[{"data":1,"prerenderedAt":803},["ShallowReactive",2],{"lexique-en-aerobic-system":3,"lexique-all-en":292,"lexique-trans-en-aerobic-system":799},{"id":4,"title":5,"author":6,"body":7,"category":279,"description":280,"extension":281,"faq":282,"lang":283,"lead":282,"letter":284,"meta":285,"navigation":286,"path":287,"ref":13,"related":282,"resources":282,"seo":288,"sources":282,"stem":289,"updated":290,"__hash__":291},"lexique/lexique/en/aerobic-system.md","Aerobic System","Ekklo",{"type":8,"value":9,"toc":268},"minimark",[10,14,19,36,43,46,49,52,57,60,82,89,91,95,161,163,167,197,199,203,231,233,237,251,253,257],[11,12,5],"h1",{"id":13},"aerobic-system",[15,16,18],"h4",{"id":17},"definition","Definition",[20,21,22,23,27,28,31,32,35],"p",{},"The ",[24,25,26],"strong",{},"aerobic system"," is the energy production pathway that ",[24,29,30],{},"uses oxygen"," to break down nutrients (carbs, fats, sometimes protein) into ",[24,33,34],{},"ATP"," (the body's energy currency). It powers all efforts lasting longer than ~2 minutes.",[20,37,38,39,42],{},"It is the ",[24,40,41],{},"cleanest, most efficient, and most sustainable"," energy system, but also the slowest to start producing energy.",[44,45],"blockquote",{},[20,47,48],{},"💡 Aerobic = \"with oxygen\". Anaerobic = \"without oxygen\". Both systems work simultaneously; only the dominant one changes by intensity.",[50,51],"hr",{},[53,54,56],"h3",{"id":55},"how-does-it-work","How does it work?",[20,58,59],{},"The aerobic system runs in the cell's mitochondria via 3 main steps:",[61,62,63,70,76],"ul",{},[64,65,66,69],"li",{},[24,67,68],{},"Glycolysis",": glucose → pyruvate (slight ATP yield)",[64,71,72,75],{},[24,73,74],{},"Krebs cycle",": pyruvate enters the mitochondria",[64,77,78,81],{},[24,79,80],{},"Electron transport chain",": massive ATP production with O2",[20,83,84,85,88],{},"Yield: ",[24,86,87],{},"1 glucose molecule = ~36 ATP"," (vs. just 2 ATP via the anaerobic pathway).",[50,90],{},[53,92,94],{"id":93},"aerobic-energy-zones","Aerobic energy zones",[96,97,98,114],"table",{},[99,100,101],"thead",{},[102,103,104,108,111],"tr",{},[105,106,107],"th",{},"Zone",[105,109,110],{},"% Max HR",[105,112,113],{},"Fuel",[115,116,117,129,140,151],"tbody",{},[102,118,119,123,126],{},[120,121,122],"td",{},"Z1 - Recovery",[120,124,125],{},"50-60%",[120,127,128],{},"~85% fats",[102,130,131,134,137],{},[120,132,133],{},"Z2 - Endurance",[120,135,136],{},"60-70%",[120,138,139],{},"Fats + carbs",[102,141,142,145,148],{},[120,143,144],{},"Z3 - Tempo",[120,146,147],{},"70-80%",[120,149,150],{},"Mostly carbs",[102,152,153,156,159],{},[120,154,155],{},"Z4 - Threshold",[120,157,158],{},"80-90%",[120,160,150],{},[50,162],{},[53,164,166],{"id":165},"how-to-develop-the-aerobic-system","How to develop the aerobic system",[61,168,169,176,182,188,194],{},[64,170,171,172,175],{},"✅ ",[24,173,174],{},"Zone 2 training",": 60-90 min at conversational pace, 3-4x/week",[64,177,171,178,181],{},[24,179,180],{},"Long-distance work",": 1-3 h continuous",[64,183,171,184,187],{},[24,185,186],{},"Threshold training",": 20-40 min at threshold pace",[64,189,171,190,193],{},[24,191,192],{},"Polarized 80/20",": 80% easy + 20% very hard",[64,195,196],{},"⚠️ Avoid the gray zone: too much medium-intensity work hurts both extremes",[50,198],{},[53,200,202],{"id":201},"why-develop-your-aerobic-system","Why develop your aerobic system?",[61,204,205,208,219,222,225,228],{},[64,206,207],{},"Better endurance and stamina",[64,209,210,211,215,216,218],{},"Better recovery ",[212,213,214],"em",{},"between"," sets and ",[212,217,214],{}," workouts",[64,220,221],{},"Stronger heart, lower resting HR",[64,223,224],{},"Improved mitochondrial function",[64,226,227],{},"Better long-term health and longevity",[64,229,230],{},"Higher daily energy levels",[50,232],{},[53,234,236],{"id":235},"common-mistakes","Common mistakes",[61,238,239,242,245,248],{},[64,240,241],{},"❌ Always training in the medium zone (gray zone)",[64,243,244],{},"❌ Confusing \"cardio\" with \"fat burn\" only",[64,246,247],{},"❌ Ignoring zone 2 because it feels \"too easy\"",[64,249,250],{},"❌ Lifters skipping cardio entirely",[50,252],{},[53,254,256],{"id":255},"key-takeaways","Key takeaways",[20,258,259,260,263,264,267],{},"The aerobic system is ",[24,261,262],{},"your fitness foundation, even as a lifter",". 2-3 zone 2 sessions per week + 1 high-intensity session = optimal cardiovascular base. ",[24,265,266],{},"A strong aerobic system speeds up recovery between strength sets too",".",{"title":269,"searchDepth":270,"depth":270,"links":271},"",2,[272,274,275,276,277,278],{"id":55,"depth":273,"text":56},3,{"id":93,"depth":273,"text":94},{"id":165,"depth":273,"text":166},{"id":201,"depth":273,"text":202},{"id":235,"depth":273,"text":236},{"id":255,"depth":273,"text":256},"methods","The aerobic system produces energy with oxygen, fueling long-duration efforts. It's the foundation of endurance and recovery.","md",null,"en","A",{},true,"/lexique/en/aerobic-system",{"title":5,"description":280},"lexique/en/aerobic-system","2026-07-27","vnjvrysFewp1tGo_HNz1O_EM3AeGVUU0sCcytUo22lo",[293,297,301,305,309,313,317,318,322,326,330,334,338,342,346,350,354,358,362,366,370,374,378,382,386,390,394,398,402,406,410,414,418,422,426,430,434,438,442,446,450,454,458,462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,530,534,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,647,651,655,659,663,667,671,675,679,683,687,691,695,699,703,707,711,715,719,723,727,731,735,739,743,747,751,755,759,763,767,771,775,779,783,787,791,795],{"title":294,"description":295,"slug":296,"ref":296},"1RM (One-Rep Max)","1RM is the heaviest load you can lift for one clean repetition — the reference for strength programming and percentages.","one-rep-max",{"title":298,"description":299,"slug":300,"ref":300},"AMRAP - As Many Reps/Rounds As Possible","AMRAP is a high-intensity training format: do as many reps or rounds as possible in a fixed time. CrossFit favorite.","amrap-as-many-reps-rounds-as-possible",{"title":302,"description":303,"slug":304,"ref":304},"ATP (Adenosine Triphosphate)","ATP is the universal energy currency of the body. Every muscle contraction, every cellular function depends on it.","atp-adenosine-triphosphate",{"title":306,"description":307,"slug":308,"ref":308},"Abduction","Discover what abduction is in bodybuilding, this movement which moves a limb away from the central axis of the body to develop the stabilizing muscles.","abduction",{"title":310,"description":311,"slug":312,"ref":312},"Active recovery","Active recovery uses light activity to speed muscle recovery. Find out how to effectively integrate it into your routine.","active-recovery",{"title":314,"description":315,"slug":316,"ref":316},"Adduction","Adduction is a movement that brings a body part toward the body's midline. Opposite of abduction.","adduction",{"title":5,"description":280,"slug":13,"ref":13},{"title":319,"description":320,"slug":321,"ref":321},"Anabolic window","The anabolic window is the post-workout period considered ideal for nutrition. The reality: it's much longer than thought.","anabolic-window",{"title":323,"description":324,"slug":325,"ref":325},"Anaerobic System","The anaerobic system produces energy without oxygen — for explosive, intense efforts. Limited but powerful, it fuels strength and sprints.","anaerobic-system",{"title":327,"description":328,"slug":329,"ref":329},"BCAA","BCAAs are 3 essential branched-chain amino acids: leucine, isoleucine, valine. Discover their real usefulness, timing, and whether you actually need them.","bcaa",{"title":331,"description":332,"slug":333,"ref":333},"BMI","BMI (Body Mass Index) is a quick health screening tool, but it doesn't account for body composition. Limited but useful.","bmi-body-mass-index",{"title":335,"description":336,"slug":337,"ref":337},"BMR","BMR (Basal Metabolic Rate) is your resting metabolism — the calories burned just to stay alive. Learn how to calculate and optimize it for your fitness goals.","bmr",{"title":339,"description":340,"slug":341,"ref":341},"Beta-alanine","Beta-alanine is an amino acid that raises muscle carnosine and can help buffering in efforts of ~1–4 minutes; tingles (paresthesia) are common.","beta-alanine",{"title":343,"description":344,"slug":345,"ref":345},"Block periodization","Block periodization concentrates training into focused blocks (accumulation, intensification, realization) with clear priorities.","block-periodization",{"title":347,"description":348,"slug":349,"ref":349},"Blood flow restriction (BFR)","BFR training uses cuffs to partially restrict blood flow so lighter loads can still stimulate hypertrophy — with safety constraints.","blood-flow-restriction",{"title":351,"description":352,"slug":353,"ref":353},"Body fat percentage","Body fat percentage measures the share of fat in your total body mass. A key indicator of body composition.","body-fat-percentage",{"title":355,"description":356,"slug":357,"ref":357},"Body recomposition","Body recomposition is gaining muscle and losing fat at the same time. Possible but slow — discover the conditions for success.","body-recomposition",{"title":359,"description":360,"slug":361,"ref":361},"Bodyweight","Bodyweight training uses your own body as resistance. No equipment, anywhere, scalable to any level.","bodyweight",{"title":363,"description":364,"slug":365,"ref":365},"Caffeine","Caffeine is a stimulant that can raise alertness and training performance; dose and timing matter for sleep and anxiety.","caffeine",{"title":367,"description":368,"slug":369,"ref":369},"Calisthenics","Calisthenics builds strength and skill primarily with bodyweight patterns (push-ups, pull-ups, dips, levers) and progressive variations.","calisthenics",{"title":371,"description":372,"slug":373,"ref":373},"Calorie Maintenance","Caloric maintenance is the calorie level keeping your weight stable. Foundation of any nutritional plan.","calorie-maintenance",{"title":375,"description":376,"slug":377,"ref":377},"Calorie Surplus","A caloric surplus means consuming more calories than you burn. Mandatory mechanism for serious muscle building.","calorie-surplus",{"title":379,"description":380,"slug":381,"ref":381},"Calorie deficit","A caloric deficit means consuming fewer calories than you burn. It's the only proven mechanism for fat loss. Learn how to set yours up properly.","calorie-deficit",{"title":383,"description":384,"slug":385,"ref":385},"Calories","Calories measure the energy provided by food. Understanding your caloric needs is the foundation of every fitness goal.","calories",{"title":387,"description":388,"slug":389,"ref":389},"Carbohydrates","Carbohydrates are the main source of energy for intense training. Discover your needs, the different types and their role in performance.","carbohydrates",{"title":391,"description":392,"slug":393,"ref":393},"Casein","Casein is a slower-digesting dairy protein, often used between meals or at night to help hit daily protein targets.","casein",{"title":395,"description":396,"slug":397,"ref":397},"Circuit training","Circuit training chains several exercises with little rest. Ideal for burning calories and improving cardiovascular fitness while keeping muscle.","circuit-training",{"title":399,"description":400,"slug":401,"ref":401},"Cluster sets","Cluster sets break a set into mini-bouts with short intra-set rests to keep bar speed and load high — useful for strength and power.","cluster-sets",{"title":403,"description":404,"slug":405,"ref":405},"Collagen","Collagen is a structural protein; supplements may support connective tissue goals but are incomplete for total muscle protein needs.","collagen",{"title":407,"description":408,"slug":409,"ref":409},"Compound exercise","A compound exercise trains several joints and muscle groups at once (squat, hinge, press, pull) — high return for strength and hypertrophy.","compound-exercise",{"title":411,"description":412,"slug":413,"ref":413},"Concentric (Phase)","The concentric phase is the lifting movement, where the muscle shortens under load. It's the active phase that produces force.","concentric-phase",{"title":415,"description":416,"slug":417,"ref":417},"Cool-down","A cool-down is light activity after hard work to gradually lower intensity; useful for feel and transition, not magic recovery.","cool-down",{"title":419,"description":420,"slug":421,"ref":421},"Creatine","Creatine is the most studied supplement in sports nutrition, proven to boost strength, power and muscle mass. Learn dosage, timing and real benefits.","creatine",{"title":423,"description":424,"slug":425,"ref":425},"Cutting","A cutting phase is a period of caloric deficit aimed at losing fat while preserving muscle. Discover how to do it without losing your hard-earned gains.","dried",{"title":427,"description":428,"slug":429,"ref":429},"DOMS (Delayed Onset Muscle Soreness)","DOMS is the muscle soreness that appears 24-72h after exercise. Discover its causes, how to manage it, and what it really means for your progress.","doms-delayed-onset-muscle-soreness",{"title":431,"description":432,"slug":433,"ref":433},"Deload","Deload is an active recovery week where you intentionally reduce volume and intensity to allow your body to fully recover and come back stronger.","deload",{"title":435,"description":436,"slug":437,"ref":437},"Dietary fiber","Dietary fiber supports satiety, digestion and cardiometabolic health; useful in fat-loss adherence plans.","dietary-fiber",{"title":439,"description":440,"slug":441,"ref":441},"Dropset","A dropset extends a set by reducing the load when failure hits. Powerful intensification method for hypertrophy.","dropset",{"title":443,"description":444,"slug":445,"ref":445},"EMOM - Every Minute On the Minute","EMOM (Every Minute On the Minute) is a training format where you start a set at the top of each minute and rest until the next.","emom-every-minute-on-the-minute",{"title":447,"description":448,"slug":449,"ref":449},"Eccentric (Phase)","The eccentric phase is the lowering movement, where the muscle lengthens under tension. It's the most damaging phase and the key driver of hypertrophy.","eccentric-phase",{"title":451,"description":452,"slug":453,"ref":453},"Electrolytes","Electrolytes (sodium, potassium, magnesium…) are minerals that conduct electrical signals and help fluid balance, especially with heavy sweating.","electrolytes",{"title":455,"description":456,"slug":457,"ref":457},"Exercise selection","Exercise selection is choosing movements that fit the goal, equipment, anatomy and skill — the foundation of a good program.","exercise-selection",{"title":459,"description":460,"slug":461,"ref":461},"Extension","Extension is the anatomical movement that increases the angle between two body segments. Opposite of flexion.","extension",{"title":463,"description":464,"slug":465,"ref":465},"Fat mass","Fat mass is the total weight of fat tissue. Essential for survival, but excess harms health and aesthetics.","fat-mass",{"title":467,"description":468,"slug":469,"ref":469},"Fibers","Muscle fibers are the cells that make up muscle. Two main types — Type I (slow) and Type II (fast) — define your physical potential.","fibers",{"title":471,"description":472,"slug":473,"ref":473},"Flexion","Flexion is the anatomical movement that decreases the angle between two body segments. Opposite of extension.","flexion",{"title":475,"description":476,"slug":477,"ref":477},"Foam rolling","Foam rolling is a myofascial self-massage technique to release muscle tension. Find out how to use it effectively to improve recovery and mobility.","foam-rolling",{"title":479,"description":480,"slug":481,"ref":481},"For Time","For Time is a training format where you complete a fixed amount of work as fast as possible. Race against the clock.","for-time",{"title":483,"description":484,"slug":485,"ref":485},"Full Body","A full body program trains all major muscle groups in each session, 2-4 times per week. Ideal for beginners and strength training.","full-body",{"title":487,"description":488,"slug":489,"ref":489},"German Volume Training (GVT)","GVT is a high-volume hypertrophy scheme classically built around 10×10 on big lifts with short rests — very fatiguing.","german-volume-training",{"title":491,"description":492,"slug":493,"ref":493},"Glycogen","Glycogen is the storage form of carbohydrate in muscle and liver — the primary fuel for hard training.","glycogen",{"title":495,"description":496,"slug":497,"ref":497},"HIIT","HIIT (High-Intensity Interval Training) alternates short hard efforts with recovery to improve fitness and calorie burn in less time.","hiit",{"title":499,"description":500,"slug":501,"ref":501},"Hydration","Hydration is maintaining fluid balance for performance, cognition and recovery — water plus electrolytes when sweat losses are high.","hydration",{"title":503,"description":504,"slug":505,"ref":505},"Hypertrophy","Muscle hypertrophy is the increase in muscle fiber size. It's the primary mechanism behind muscle growth from resistance training.","hypertrophy",{"title":507,"description":508,"slug":509,"ref":509},"Hypertrophy Training","Hypertrophy training aims to maximize muscle growth using moderate loads (65-85% 1RM) with 8-15 repetitions per set.","hypertrophy-training",{"title":511,"description":512,"slug":513,"ref":513},"Intermittent fasting","Intermittent fasting restricts eating to time windows; fat loss still depends mainly on calorie balance and protein.","intermittent-fasting",{"title":515,"description":516,"slug":517,"ref":517},"Intra-workout","Intra-workout refers to nutrition consumed during training to maintain energy, hydration and performance on long sessions.","intra-workout",{"title":519,"description":520,"slug":521,"ref":521},"Isolation exercise","An isolation exercise targets mainly one joint and one muscle group (curl, lateral raise, leg extension) to add local volume or correct imbalances.","isolation-exercise",{"title":523,"description":524,"slug":525,"ref":525},"Isometric","Isometric contraction is when the muscle produces tension without changing length. No visible movement, intense work.","isometric-contraction",{"title":527,"description":528,"slug":529,"ref":529},"LISS","LISS (Low-Intensity Steady State) is continuous easy cardio at a conversational pace — useful for recovery, aerobic base and extra calorie burn.","liss",{"title":531,"description":532,"slug":533,"ref":533},"Lean bulk","A lean bulk is a slow, controlled surplus aimed at maximizing muscle gain while limiting fat gain.","lean-bulk",{"title":535,"description":536,"slug":537,"ref":537},"Lean mass","Lean mass is everything in your body except fat: muscles, bones, organs, water. A real performance indicator.","lean-mass",{"title":539,"description":540,"slug":541,"ref":541},"Linear periodization","Linear periodization progresses from higher volume/lower intensity toward lower volume/higher intensity over weeks.","linear-periodization",{"title":543,"description":544,"slug":545,"ref":545},"Lipids (Fats)","Lipids are essential for hormone production and vitamin absorption. Discover your needs, the right sources and their role in bodybuilding.","lipids-fats",{"title":547,"description":548,"slug":549,"ref":549},"Macrocycle","A macrocycle is the global organization of your training over 3-12 months. The highest level of periodization, your annual game plan.","macrocycle",{"title":551,"description":552,"slug":553,"ref":553},"Macronutrients (Macros)","Macronutrients are the 3 main types of nutrients: proteins, carbohydrates and lipids. Their balance is crucial for performance and body composition.","macronutrients-macros",{"title":555,"description":556,"slug":557,"ref":557},"Maintenance","Maintenance is the calorie level at which your weight remains stable. The neutral baseline for any nutritional strategy.","maintenance",{"title":559,"description":560,"slug":561,"ref":561},"Mass gain","Mass gain (or bulk) is a controlled caloric surplus phase aimed at building muscle. Discover how to do it without gaining excess fat.","mass-gain",{"title":563,"description":564,"slug":565,"ref":565},"Meal timing","Meal timing is the strategic distribution of your meals around training and through the day to optimize performance and recovery.","meal-timing",{"title":567,"description":568,"slug":569,"ref":569},"Mesocycle","A mesocycle is a 4-8 week training block with a specific objective (hypertrophy, strength, peak, deload). The cornerstone of periodization.","mesocycle",{"title":571,"description":572,"slug":573,"ref":573},"Microcycle","A microcycle is the smallest planning unit in bodybuilding: generally 1 week of training. This is your weekly routine.","microcycle",{"title":575,"description":576,"slug":577,"ref":577},"Mind-muscle connection","Mind-muscle connection is the intentional focus on feeling the target muscle contract — useful for hypertrophy technique and isolation work.","mind-muscle-connection",{"title":579,"description":580,"slug":581,"ref":581},"Mobility","Mobility is the ability to actively control range of motion. Find out how to improve your mobility to optimize your performance.","mobility",{"title":583,"description":584,"slug":585,"ref":585},"Muscle failure","Muscle failure is the point where you cannot complete another clean rep with the target technique — RIR 0 / RPE 10.","muscle-failure",{"title":587,"description":588,"slug":589,"ref":589},"Muscle mass","Muscle mass is the total weight of muscles in the body. Key indicator of strength, metabolism, and longevity.","muscle-mass",{"title":591,"description":592,"slug":593,"ref":593},"Muscular Endurance Training","Muscular endurance training develops the ability to sustain prolonged effort. Light loads, high reps, short rests.","muscular-endurance-training",{"title":595,"description":596,"slug":597,"ref":597},"Muscular endurance","Muscular endurance is a muscle's capacity to sustain repeated or prolonged contractions without excessive fatigue. Foundation of many sports.","muscular-endurance",{"title":599,"description":600,"slug":601,"ref":601},"Muscular strength","Muscular strength is the maximum force a muscle (or group) can produce. The fundamental physical quality of any athlete.","muscular-strength",{"title":603,"description":604,"slug":605,"ref":605},"Myo-reps","Myo-reps is an intensification method: an activation set near failure, then mini-sets with short rests to accumulate effective reps.","myo-reps",{"title":607,"description":608,"slug":609,"ref":609},"NEAT","NEAT is the energy you burn through all your daily activities outside of training. The most underestimated lever of your body composition.","neat",{"title":611,"description":612,"slug":613,"ref":613},"Omega-3 fatty acids","Omega-3 fats (EPA/DHA) support general health; in athletes they are discussed for recovery and inflammation — food first, then supplements if needed.","omega-3",{"title":615,"description":616,"slug":617,"ref":617},"Overreaching","Overreaching is a short-term performance drop from hard training that recovers with planned rest — unlike prolonged overtraining.","overreaching",{"title":619,"description":620,"slug":621,"ref":621},"Overtraining","Overtraining is a prolonged performance drop from excess stress without enough recovery — rarer than simple overreaching.","overtraining",{"title":623,"description":624,"slug":625,"ref":625},"PR - Personal Record","A PR (Personal Record) is your best performance ever on a movement. The fundamental progress marker.","pr-personal-record",{"title":627,"description":628,"slug":629,"ref":629},"Passive recovery","Passive recovery links on complete rest to allow the body to regenerate. Find out when and how to use it effectively.","passive-recovery",{"title":631,"description":632,"slug":633,"ref":633},"Periodization","Periodization is the cyclical organization of training into distinct phases to optimize progression, prevent plateaus, and avoid injuries.","periodization",{"title":635,"description":636,"slug":637,"ref":637},"Plateau","A plateau is a period of stagnation despite consistent training. Identifying the cause is the key to breaking it.","plateau",{"title":639,"description":640,"slug":641,"ref":641},"Post-workout","The post-workout is the nutrition right after training to optimize recovery and growth. Protein, carbs, hydration.","post-workout",{"title":643,"description":644,"slug":645,"ref":646},"Power (explosive strength)","Power is force × velocity — producing force quickly. Trained with intent, moderate loads moved fast, jumps/throws, and adequate rest.","power-training","power",{"title":648,"description":649,"slug":650,"ref":650},"Powerlifting","Powerlifting is a strength sport focused on maximal squat, bench press and deadlift — programming revolves around heavy compounds and peaking.","powerlifting",{"title":652,"description":653,"slug":654,"ref":654},"Pre-workout","The pre-workout is the meal or supplement taken before training to optimize performance. Energy, focus, and pump.","pre-workout",{"title":656,"description":657,"slug":658,"ref":658},"Progressive overload","Progressive overload is the foundational principle of training: gradually increasing the demand on your muscles to keep gaining strength and size.","progressive-overload",{"title":660,"description":661,"slug":662,"ref":662},"Protein","Protein is the essential macronutrient for building and repairing muscle. Discover your needs, the best sources and the optimal timing.","protein",{"title":664,"description":665,"slug":666,"ref":666},"Protein powder","Protein powders are concentrated protein supplements. Practical for hitting daily protein needs.","protein-powder",{"title":668,"description":669,"slug":670,"ref":670},"Push/Pull/Legs (PPL)","The Push/Pull/Legs program divides the workout into 3 types of sessions: push (chests/shoulders/triceps), pull (back/biceps) and legs. Optimal for all levels with frequency 2x/week per muscle.","push-pull-legs-ppl",{"title":672,"description":673,"slug":674,"ref":674},"RIR","RIR (Reps in Reserve) measures how many reps you have left before failure. Modern, intuitive tool to manage intensity.","rir-reps-in-reserve",{"title":676,"description":677,"slug":678,"ref":678},"RPE","RPE (Rate of Perceived Exertion) is a 1-10 scale to measure subjective effort. Essential tool for managing intensity.","rpe-rate-of-perceived-exertion",{"title":680,"description":681,"slug":682,"ref":682},"Range of motion (ROM)","Range of motion (ROM) is the amplitude through which a joint or muscle can move during an exercise. Crucial for hypertrophy and joint health.","range-of-motion-rom",{"title":684,"description":685,"slug":686,"ref":686},"Refeed","A refeed is a planned short increase in calories (often carbs) during a fat-loss phase to support training, hormones and adherence.","refeed",{"title":688,"description":689,"slug":690,"ref":690},"Repetitions (Reps)","A rep is one complete execution of an exercise. The rep range determines whether you primarily develop strength, hypertrophy, or muscular endurance.","repetitions-reps",{"title":692,"description":693,"slug":694,"ref":694},"Reps to failure (RTF)","RTF means performing reps until no clean rep remains; useful sparingly for hypertrophy, costly if overused on heavy compounds.","reps-to-failure",{"title":696,"description":697,"slug":698,"ref":698},"Rest","Rest between sets is critical and depends on the goal. Strength: 3-5 min. Hypertrophy: 1-3 min. Endurance: 30-60 sec.","rest",{"title":700,"description":701,"slug":702,"ref":702},"Rest day","A rest day is planned time off hard training so adaptation can occur; it can be full rest or very light activity.","rest-day",{"title":704,"description":705,"slug":706,"ref":706},"Rest-Pause","Rest-pause is an intensification method using ultra-short pauses to extend a set. Powerful tool for hypertrophy.","rest-pause",{"title":708,"description":709,"slug":710,"ref":710},"Sarcomere","The sarcomere is the basic contractile unit of muscle. Composed of actin and myosin, it produces all your movements.","sarcomere",{"title":712,"description":713,"slug":714,"ref":714},"Series (Sets)","A series (or set) is a group of consecutive reps without rest. The basic unit of training programming.","series-sets",{"title":716,"description":717,"slug":718,"ref":718},"Sleep","Sleep is the most underrated training variable. It's during sleep that recovery, muscle building, and hormonal regulation happen.","sleep",{"title":720,"description":721,"slug":722,"ref":722},"Split (Split program)","A split workout involves dividing muscle groups over different days. The classic split trains each muscle once a week for 5-6 days.","split-split-program",{"title":724,"description":725,"slug":726,"ref":726},"Strength Training","Strength training aims to develop maximal strength using heavy loads (80-95% of 1RM) with few repetitions (1-6 reps).","strength-training",{"title":728,"description":729,"slug":730,"ref":730},"Stretching","Stretching improves flexibility and range of motion. Learn about the different types and how to effectively incorporate them into your routine.","stretching",{"title":732,"description":733,"slug":734,"ref":734},"Superset","A superset chains two exercises with no rest between them. Time-efficient method that boosts intensity and density.","superset",{"title":736,"description":737,"slug":738,"ref":738},"TDEE","TDEE (Total Daily Energy Expenditure) represents your total daily energy expenditure. Find out how to calculate it precisely to optimize your results.","tdee",{"title":740,"description":741,"slug":742,"ref":742},"TUT - Time Under Tension","TUT (Time Under Tension) measures the total time the muscle is under load during a set. Key variable for hypertrophy.","tut-time-under-tension",{"title":744,"description":745,"slug":746,"ref":746},"Tabata","Tabata is a 4-minute HIIT protocol: 20 seconds max effort, 10 seconds rest, 8 rounds. Maximum efficiency in minimum time.","tabata",{"title":748,"description":749,"slug":750,"ref":750},"Tempo - Execution speed","Tempo is the controlled speed of each phase of a movement. Powerful tool to maximize stimulus and control.","tempo-execution-speed",{"title":752,"description":753,"slug":754,"ref":754},"Training density","Training density measures the amount of work done per unit of time. Increase it to boost intensity and metabolic stress.","training-density",{"title":756,"description":757,"slug":758,"ref":758},"Training frequency","Training frequency defines how many times per week you work a muscle. Discover the optimal frequency to progress.","training-frequency",{"title":760,"description":761,"slug":762,"ref":762},"Training intensity","Bodybuilding intensity measures the difficulty of the effort. Find out how to calculate it with % of 1RM, RPE, and RIR.","training-intensity",{"title":764,"description":765,"slug":766,"ref":766},"Training volume","Training volume represents the total amount of work performed. Discover the optimal volumes per muscle per week to progress.","training-volume",{"title":768,"description":769,"slug":770,"ref":770},"Type I muscle fibers","Type I fibers (slow-twitch) are endurance-oriented muscle fibers. Resistant to fatigue, they sustain prolonged efforts.","muscle-fibers-type-i",{"title":772,"description":773,"slug":774,"ref":774},"Type II muscle fibers","Type II fibers (fast-twitch) are powerful muscle fibers optimized for explosive efforts. Essential for strength and power.","type-ii-muscle-fibers",{"title":776,"description":777,"slug":778,"ref":778},"Undulating periodization","Undulating periodization varies volume and intensity frequently (daily or weekly) instead of long linear phases.","undulating-periodization",{"title":780,"description":781,"slug":782,"ref":782},"Upper/Lower","The Upper/Lower program divides training into upper body and lower body sessions over 4 days per week. Perfect balance between frequency (2x/week) and volume for all levels.","upper-lower",{"title":784,"description":785,"slug":786,"ref":786},"VO2 max","VO2 max is the maximum amount of oxygen your body can use during intense exercise. It's the gold standard of cardiovascular fitness.","vo2-max",{"title":788,"description":789,"slug":790,"ref":790},"Warm-up","A warm-up raises temperature, primes the nervous system and rehearses the session patterns before hard sets.","warm-up",{"title":792,"description":793,"slug":794,"ref":794},"Whey protein","Whey is a fast-digesting dairy protein powder, rich in leucine — a convenient way to hit daily protein targets.","whey-protein",{"title":796,"description":797,"slug":798,"ref":798},"Zone 2","Zone 2 is a moderate aerobic intensity (often ~60–70% HRmax) where you can talk in full sentences — foundation of endurance base.","zone-2",{"de":800,"en":13,"es":801,"fr":802,"it":801,"pt":801},"aerobes-system","sistema-aerobico","systeme-aerobie",1785169292663]