[{"data":1,"prerenderedAt":764},["ShallowReactive",2],{"lexique-en-type-ii-muscle-fibers":3,"lexique-all-en":252,"lexique-trans-en-type-ii-muscle-fibers":759},{"id":4,"title":5,"author":6,"body":7,"category":239,"description":240,"extension":241,"faq":242,"lang":243,"lead":242,"letter":244,"meta":245,"navigation":246,"path":247,"ref":13,"related":242,"resources":242,"seo":248,"sources":242,"stem":249,"updated":250,"__hash__":251},"lexique/lexique/en/type-ii-muscle-fibers.md","Type II muscle fibers","Ekklo",{"type":8,"value":9,"toc":229},"minimark",[10,14,19,31,34,37,40,45,99,102,104,108,149,151,155,187,189,192,194,198,212,214,218],[11,12,5],"h1",{"id":13},"type-ii-muscle-fibers",[15,16,18],"h4",{"id":17},"definition","Definition",[20,21,22,26,27,30],"p",{},[23,24,25],"strong",{},"Type II fibers"," (or fast-twitch / \"white\" fibers) are ",[23,28,29],{},"muscle fibers optimized for high-intensity, short-duration efforts",". They contract quickly and powerfully, but fatigue rapidly.",[32,33],"blockquote",{},[20,35,36],{},"💡 The triceps, biceps, quadriceps and gastrocnemius are typically rich in type II fibers. The opposite of type I fibers (slow, endurance-oriented).",[38,39],"hr",{},[41,42,44],"h3",{"id":43},"the-2-subtypes-of-type-ii","The 2 subtypes of Type II",[46,47,48,67],"table",{},[49,50,51],"thead",{},[52,53,54,58,61,64],"tr",{},[55,56,57],"th",{},"Subtype",[55,59,60],{},"Speed",[55,62,63],{},"Endurance",[55,65,66],{},"Profile",[68,69,70,85],"tbody",{},[52,71,72,76,79,82],{},[73,74,75],"td",{},"Type IIa",[73,77,78],{},"Fast",[73,80,81],{},"Moderate",[73,83,84],{},"Hybrid (force + some endurance)",[52,86,87,90,93,96],{},[73,88,89],{},"Type IIb (or IIx)",[73,91,92],{},"Very fast",[73,94,95],{},"Very low",[73,97,98],{},"Pure power, explosive",[20,100,101],{},"Type IIb fibers are the most powerful, but also the fastest to fatigue.",[38,103],{},[41,105,107],{"id":106},"characteristics-of-type-ii","Characteristics of Type II",[109,110,111,119,125,131,137,143],"ul",{},[112,113,114,115,118],"li",{},"✅ ",[23,116,117],{},"Force production",": very high",[112,120,114,121,124],{},[23,122,123],{},"Contraction speed",": fast to very fast",[112,126,114,127,130],{},[23,128,129],{},"Hypertrophy potential",": high (visible muscle gains)",[112,132,133,134,136],{},"❌ ",[23,135,63],{},": low",[112,138,133,139,142],{},[23,140,141],{},"Mitochondria",": few",[112,144,133,145,148],{},[23,146,147],{},"Energy source",": anaerobic (ATP-PC, glycolysis)",[38,150],{},[41,152,154],{"id":153},"how-to-develop-type-ii","How to develop Type II",[109,156,157,163,169,175,181],{},[112,158,114,159,162],{},[23,160,161],{},"Heavy reps",": 1-8 reps at 70-90% 1RM",[112,164,114,165,168],{},[23,166,167],{},"Long rest",": 3-5 minutes",[112,170,114,171,174],{},[23,172,173],{},"Explosive movements",": power cleans, jumps, plyometrics",[112,176,114,177,180],{},[23,178,179],{},"Sprints",": 20-100 m at maximum effort",[112,182,114,183,186],{},[23,184,185],{},"Maximum movement speed",": even with moderate loads, push intent",[32,188],{},[20,190,191],{},"⚠️ Type II fibers atrophy faster with age and inactivity than type I. Maintaining them requires regular stimulation.",[38,193],{},[41,195,197],{"id":196},"common-mistakes","Common mistakes",[109,199,200,203,206,209],{},[112,201,202],{},"❌ Always training at high reps (15+) → ignores type II",[112,204,205],{},"❌ Slow movements without explosive intent",[112,207,208],{},"❌ Cardio-only without resistance training (atrophy of type II)",[112,210,211],{},"❌ Skipping plyometrics and sprints",[38,213],{},[41,215,217],{"id":216},"key-takeaways","Key takeaways",[20,219,220,221,224,225,228],{},"Type II fibers are ",[23,222,223],{},"your engine for strength, power and visible hypertrophy",". Train them with heavy loads, low reps, explosive intent. ",[23,226,227],{},"Develop them young, maintain them with age"," — they're the first to disappear with sedentarism.",{"title":230,"searchDepth":231,"depth":231,"links":232},"",2,[233,235,236,237,238],{"id":43,"depth":234,"text":44},3,{"id":106,"depth":234,"text":107},{"id":153,"depth":234,"text":154},{"id":196,"depth":234,"text":197},{"id":216,"depth":234,"text":217},"anatomy","Type II fibers (fast-twitch) are powerful muscle fibers optimized for explosive efforts. Essential for strength and power.","md",null,"en","T",{},true,"/lexique/en/type-ii-muscle-fibers",{"title":5,"description":240},"lexique/en/type-ii-muscle-fibers","2026-07-27","JJhS4P3ZN4YqfCo3key7tPWnUqo_h3JqyI2SPGUug9U",[253,257,261,265,269,273,277,281,285,289,293,297,301,305,309,313,317,321,325,329,333,337,341,345,349,353,357,361,365,369,373,377,381,385,389,393,397,401,405,409,413,417,421,425,429,433,437,441,445,449,453,457,461,465,469,473,477,481,485,489,493,497,501,505,509,513,517,521,525,529,533,537,541,545,549,553,557,561,565,569,573,577,581,585,589,593,597,601,605,610,614,618,622,626,630,634,638,642,646,650,654,658,662,666,670,674,678,682,686,690,694,698,702,706,710,714,718,722,726,730,734,735,739,743,747,751,755],{"title":254,"description":255,"slug":256,"ref":256},"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":258,"description":259,"slug":260,"ref":260},"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":262,"description":263,"slug":264,"ref":264},"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":266,"description":267,"slug":268,"ref":268},"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":270,"description":271,"slug":272,"ref":272},"Active recovery","Active recovery uses light activity to speed muscle recovery. Find out how to effectively integrate it into your routine.","active-recovery",{"title":274,"description":275,"slug":276,"ref":276},"Adduction","Adduction is a movement that brings a body part toward the body's midline. Opposite of abduction.","adduction",{"title":278,"description":279,"slug":280,"ref":280},"Aerobic System","The aerobic system produces energy with oxygen, fueling long-duration efforts. It's the foundation of endurance and recovery.","aerobic-system",{"title":282,"description":283,"slug":284,"ref":284},"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":286,"description":287,"slug":288,"ref":288},"Anaerobic System","The anaerobic system produces energy without oxygen — for explosive, intense efforts. Limited but powerful, it fuels strength and sprints.","anaerobic-system",{"title":290,"description":291,"slug":292,"ref":292},"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":294,"description":295,"slug":296,"ref":296},"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":298,"description":299,"slug":300,"ref":300},"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":302,"description":303,"slug":304,"ref":304},"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":306,"description":307,"slug":308,"ref":308},"Block periodization","Block periodization concentrates training into focused blocks (accumulation, intensification, realization) with clear priorities.","block-periodization",{"title":310,"description":311,"slug":312,"ref":312},"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":314,"description":315,"slug":316,"ref":316},"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":318,"description":319,"slug":320,"ref":320},"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":322,"description":323,"slug":324,"ref":324},"Bodyweight","Bodyweight training uses your own body as resistance. No equipment, anywhere, scalable to any level.","bodyweight",{"title":326,"description":327,"slug":328,"ref":328},"Caffeine","Caffeine is a stimulant that can raise alertness and training performance; dose and timing matter for sleep and anxiety.","caffeine",{"title":330,"description":331,"slug":332,"ref":332},"Calisthenics","Calisthenics builds strength and skill primarily with bodyweight patterns (push-ups, pull-ups, dips, levers) and progressive variations.","calisthenics",{"title":334,"description":335,"slug":336,"ref":336},"Calorie Maintenance","Caloric maintenance is the calorie level keeping your weight stable. Foundation of any nutritional plan.","calorie-maintenance",{"title":338,"description":339,"slug":340,"ref":340},"Calorie Surplus","A caloric surplus means consuming more calories than you burn. Mandatory mechanism for serious muscle building.","calorie-surplus",{"title":342,"description":343,"slug":344,"ref":344},"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":346,"description":347,"slug":348,"ref":348},"Calories","Calories measure the energy provided by food. Understanding your caloric needs is the foundation of every fitness goal.","calories",{"title":350,"description":351,"slug":352,"ref":352},"Carbohydrates","Carbohydrates are the main source of energy for intense training. Discover your needs, the different types and their role in performance.","carbohydrates",{"title":354,"description":355,"slug":356,"ref":356},"Casein","Casein is a slower-digesting dairy protein, often used between meals or at night to help hit daily protein targets.","casein",{"title":358,"description":359,"slug":360,"ref":360},"Circuit training","Circuit training chains several exercises with little rest. Ideal for burning calories and improving cardiovascular fitness while keeping muscle.","circuit-training",{"title":362,"description":363,"slug":364,"ref":364},"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":366,"description":367,"slug":368,"ref":368},"Collagen","Collagen is a structural protein; supplements may support connective tissue goals but are incomplete for total muscle protein needs.","collagen",{"title":370,"description":371,"slug":372,"ref":372},"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":374,"description":375,"slug":376,"ref":376},"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":378,"description":379,"slug":380,"ref":380},"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":382,"description":383,"slug":384,"ref":384},"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":386,"description":387,"slug":388,"ref":388},"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":390,"description":391,"slug":392,"ref":392},"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":394,"description":395,"slug":396,"ref":396},"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":398,"description":399,"slug":400,"ref":400},"Dietary fiber","Dietary fiber supports satiety, digestion and cardiometabolic health; useful in fat-loss adherence plans.","dietary-fiber",{"title":402,"description":403,"slug":404,"ref":404},"Dropset","A dropset extends a set by reducing the load when failure hits. Powerful intensification method for hypertrophy.","dropset",{"title":406,"description":407,"slug":408,"ref":408},"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":410,"description":411,"slug":412,"ref":412},"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":414,"description":415,"slug":416,"ref":416},"Electrolytes","Electrolytes (sodium, potassium, magnesium…) are minerals that conduct electrical signals and help fluid balance, especially with heavy sweating.","electrolytes",{"title":418,"description":419,"slug":420,"ref":420},"Exercise selection","Exercise selection is choosing movements that fit the goal, equipment, anatomy and skill — the foundation of a good program.","exercise-selection",{"title":422,"description":423,"slug":424,"ref":424},"Extension","Extension is the anatomical movement that increases the angle between two body segments. Opposite of flexion.","extension",{"title":426,"description":427,"slug":428,"ref":428},"Fat mass","Fat mass is the total weight of fat tissue. Essential for survival, but excess harms health and aesthetics.","fat-mass",{"title":430,"description":431,"slug":432,"ref":432},"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":434,"description":435,"slug":436,"ref":436},"Flexion","Flexion is the anatomical movement that decreases the angle between two body segments. Opposite of extension.","flexion",{"title":438,"description":439,"slug":440,"ref":440},"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":442,"description":443,"slug":444,"ref":444},"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":446,"description":447,"slug":448,"ref":448},"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":450,"description":451,"slug":452,"ref":452},"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":454,"description":455,"slug":456,"ref":456},"Glycogen","Glycogen is the storage form of carbohydrate in muscle and liver — the primary fuel for hard training.","glycogen",{"title":458,"description":459,"slug":460,"ref":460},"HIIT","HIIT (High-Intensity Interval Training) alternates short hard efforts with recovery to improve fitness and calorie burn in less time.","hiit",{"title":462,"description":463,"slug":464,"ref":464},"Hydration","Hydration is maintaining fluid balance for performance, cognition and recovery — water plus electrolytes when sweat losses are high.","hydration",{"title":466,"description":467,"slug":468,"ref":468},"Hypertrophy","Muscle hypertrophy is the increase in muscle fiber size. It's the primary mechanism behind muscle growth from resistance training.","hypertrophy",{"title":470,"description":471,"slug":472,"ref":472},"Hypertrophy Training","Hypertrophy training aims to maximize muscle growth using moderate loads (65-85% 1RM) with 8-15 repetitions per set.","hypertrophy-training",{"title":474,"description":475,"slug":476,"ref":476},"Intermittent fasting","Intermittent fasting restricts eating to time windows; fat loss still depends mainly on calorie balance and protein.","intermittent-fasting",{"title":478,"description":479,"slug":480,"ref":480},"Intra-workout","Intra-workout refers to nutrition consumed during training to maintain energy, hydration and performance on long sessions.","intra-workout",{"title":482,"description":483,"slug":484,"ref":484},"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":486,"description":487,"slug":488,"ref":488},"Isometric","Isometric contraction is when the muscle produces tension without changing length. No visible movement, intense work.","isometric-contraction",{"title":490,"description":491,"slug":492,"ref":492},"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":494,"description":495,"slug":496,"ref":496},"Lean bulk","A lean bulk is a slow, controlled surplus aimed at maximizing muscle gain while limiting fat gain.","lean-bulk",{"title":498,"description":499,"slug":500,"ref":500},"Lean mass","Lean mass is everything in your body except fat: muscles, bones, organs, water. A real performance indicator.","lean-mass",{"title":502,"description":503,"slug":504,"ref":504},"Linear periodization","Linear periodization progresses from higher volume/lower intensity toward lower volume/higher intensity over weeks.","linear-periodization",{"title":506,"description":507,"slug":508,"ref":508},"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":510,"description":511,"slug":512,"ref":512},"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":514,"description":515,"slug":516,"ref":516},"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":518,"description":519,"slug":520,"ref":520},"Maintenance","Maintenance is the calorie level at which your weight remains stable. The neutral baseline for any nutritional strategy.","maintenance",{"title":522,"description":523,"slug":524,"ref":524},"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":526,"description":527,"slug":528,"ref":528},"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":530,"description":531,"slug":532,"ref":532},"Mesocycle","A mesocycle is a 4-8 week training block with a specific objective (hypertrophy, strength, peak, deload). The cornerstone of periodization.","mesocycle",{"title":534,"description":535,"slug":536,"ref":536},"Microcycle","A microcycle is the smallest planning unit in bodybuilding: generally 1 week of training. This is your weekly routine.","microcycle",{"title":538,"description":539,"slug":540,"ref":540},"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":542,"description":543,"slug":544,"ref":544},"Mobility","Mobility is the ability to actively control range of motion. Find out how to improve your mobility to optimize your performance.","mobility",{"title":546,"description":547,"slug":548,"ref":548},"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":550,"description":551,"slug":552,"ref":552},"Muscle mass","Muscle mass is the total weight of muscles in the body. Key indicator of strength, metabolism, and longevity.","muscle-mass",{"title":554,"description":555,"slug":556,"ref":556},"Muscular Endurance Training","Muscular endurance training develops the ability to sustain prolonged effort. Light loads, high reps, short rests.","muscular-endurance-training",{"title":558,"description":559,"slug":560,"ref":560},"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":562,"description":563,"slug":564,"ref":564},"Muscular strength","Muscular strength is the maximum force a muscle (or group) can produce. The fundamental physical quality of any athlete.","muscular-strength",{"title":566,"description":567,"slug":568,"ref":568},"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":570,"description":571,"slug":572,"ref":572},"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":574,"description":575,"slug":576,"ref":576},"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":578,"description":579,"slug":580,"ref":580},"Overreaching","Overreaching is a short-term performance drop from hard training that recovers with planned rest — unlike prolonged overtraining.","overreaching",{"title":582,"description":583,"slug":584,"ref":584},"Overtraining","Overtraining is a prolonged performance drop from excess stress without enough recovery — rarer than simple overreaching.","overtraining",{"title":586,"description":587,"slug":588,"ref":588},"PR - Personal Record","A PR (Personal Record) is your best performance ever on a movement. The fundamental progress marker.","pr-personal-record",{"title":590,"description":591,"slug":592,"ref":592},"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":594,"description":595,"slug":596,"ref":596},"Periodization","Periodization is the cyclical organization of training into distinct phases to optimize progression, prevent plateaus, and avoid injuries.","periodization",{"title":598,"description":599,"slug":600,"ref":600},"Plateau","A plateau is a period of stagnation despite consistent training. Identifying the cause is the key to breaking it.","plateau",{"title":602,"description":603,"slug":604,"ref":604},"Post-workout","The post-workout is the nutrition right after training to optimize recovery and growth. Protein, carbs, hydration.","post-workout",{"title":606,"description":607,"slug":608,"ref":609},"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":611,"description":612,"slug":613,"ref":613},"Powerlifting","Powerlifting is a strength sport focused on maximal squat, bench press and deadlift — programming revolves around heavy compounds and peaking.","powerlifting",{"title":615,"description":616,"slug":617,"ref":617},"Pre-workout","The pre-workout is the meal or supplement taken before training to optimize performance. Energy, focus, and pump.","pre-workout",{"title":619,"description":620,"slug":621,"ref":621},"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":623,"description":624,"slug":625,"ref":625},"Protein","Protein is the essential macronutrient for building and repairing muscle. Discover your needs, the best sources and the optimal timing.","protein",{"title":627,"description":628,"slug":629,"ref":629},"Protein powder","Protein powders are concentrated protein supplements. Practical for hitting daily protein needs.","protein-powder",{"title":631,"description":632,"slug":633,"ref":633},"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":635,"description":636,"slug":637,"ref":637},"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":639,"description":640,"slug":641,"ref":641},"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":643,"description":644,"slug":645,"ref":645},"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":647,"description":648,"slug":649,"ref":649},"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":651,"description":652,"slug":653,"ref":653},"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":655,"description":656,"slug":657,"ref":657},"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":659,"description":660,"slug":661,"ref":661},"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":663,"description":664,"slug":665,"ref":665},"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":667,"description":668,"slug":669,"ref":669},"Rest-Pause","Rest-pause is an intensification method using ultra-short pauses to extend a set. Powerful tool for hypertrophy.","rest-pause",{"title":671,"description":672,"slug":673,"ref":673},"Sarcomere","The sarcomere is the basic contractile unit of muscle. Composed of actin and myosin, it produces all your movements.","sarcomere",{"title":675,"description":676,"slug":677,"ref":677},"Series (Sets)","A series (or set) is a group of consecutive reps without rest. The basic unit of training programming.","series-sets",{"title":679,"description":680,"slug":681,"ref":681},"Sleep","Sleep is the most underrated training variable. It's during sleep that recovery, muscle building, and hormonal regulation happen.","sleep",{"title":683,"description":684,"slug":685,"ref":685},"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":687,"description":688,"slug":689,"ref":689},"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":691,"description":692,"slug":693,"ref":693},"Stretching","Stretching improves flexibility and range of motion. Learn about the different types and how to effectively incorporate them into your routine.","stretching",{"title":695,"description":696,"slug":697,"ref":697},"Superset","A superset chains two exercises with no rest between them. Time-efficient method that boosts intensity and density.","superset",{"title":699,"description":700,"slug":701,"ref":701},"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":703,"description":704,"slug":705,"ref":705},"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":707,"description":708,"slug":709,"ref":709},"Tabata","Tabata is a 4-minute HIIT protocol: 20 seconds max effort, 10 seconds rest, 8 rounds. Maximum efficiency in minimum time.","tabata",{"title":711,"description":712,"slug":713,"ref":713},"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":715,"description":716,"slug":717,"ref":717},"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":719,"description":720,"slug":721,"ref":721},"Training frequency","Training frequency defines how many times per week you work a muscle. Discover the optimal frequency to progress.","training-frequency",{"title":723,"description":724,"slug":725,"ref":725},"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":727,"description":728,"slug":729,"ref":729},"Training volume","Training volume represents the total amount of work performed. Discover the optimal volumes per muscle per week to progress.","training-volume",{"title":731,"description":732,"slug":733,"ref":733},"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":5,"description":240,"slug":13,"ref":13},{"title":736,"description":737,"slug":738,"ref":738},"Undulating periodization","Undulating periodization varies volume and intensity frequently (daily or weekly) instead of long linear phases.","undulating-periodization",{"title":740,"description":741,"slug":742,"ref":742},"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":744,"description":745,"slug":746,"ref":746},"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":748,"description":749,"slug":750,"ref":750},"Warm-up","A warm-up raises temperature, primes the nervous system and rehearses the session patterns before hard sets.","warm-up",{"title":752,"description":753,"slug":754,"ref":754},"Whey protein","Whey is a fast-digesting dairy protein powder, rich in leucine — a convenient way to hit daily protein targets.","whey-protein",{"title":756,"description":757,"slug":758,"ref":758},"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":760,"en":13,"es":761,"fr":762,"it":763,"pt":761},"typ-ii-muskelfasern","fibras-musculares-tipo-ii","fibres-musculaires-type2","fibre-muscolari-tipo-ii",1785169300778]