[{"data":1,"prerenderedAt":802},["ShallowReactive",2],{"lexique-en-creatine":3,"lexique-all-en":445,"lexique-trans-en-creatine":799},{"id":4,"title":5,"body":6,"description":435,"extension":436,"lang":437,"letter":438,"meta":439,"navigation":440,"path":441,"ref":12,"seo":442,"stem":443,"__hash__":444},"lexique/lexique/en/creatine.md","Creatine",{"type":7,"value":8,"toc":423},"minimark",[9,13,18,29,36,39,42,45,50,53,57,64,70,77,90,92,96,182,184,188,191,196,219,221,224,226,230,234,241,245,252,255,259,266,280,282,286,289,293,320,324,339,341,345,406,408,412],[10,11,5],"h1",{"id":12},"creatine",[14,15,17],"h4",{"id":16},"definition","Definition",[19,20,21,24,25,28],"p",{},[22,23,5],"strong",{}," is a natural compound produced by the human body (liver, kidneys, pancreas) from 3 amino acids: ",[22,26,27],{},"arginine, glycine and methionine",". It is stored at 95% in skeletal muscle as phosphocreatine.",[19,30,31,32,35],{},"It is by far ",[22,33,34],{},"the most studied sports supplement in the world",", with over 1000 published scientific studies. Its efficacy and safety are proven beyond any reasonable doubt.",[37,38],"blockquote",{},[19,40,41],{},"💡 Creatine is not a doping product. It is a molecule naturally present in red meat and fish, and produced by your own body every day.",[43,44],"hr",{},[46,47,49],"h3",{"id":48},"how-does-creatine-work","How does creatine work?",[19,51,52],{},"To understand its effect, you need to understand how your body produces energy during intense effort.",[14,54,56],{"id":55},"the-atp-pc-system","The ATP-PC system",[19,58,59,60,63],{},"During an explosive effort (squat, sprint, deadlift), your muscles use ",[22,61,62],{},"ATP"," (adenosine triphosphate) as fuel. But your ATP stores are limited: they are depleted in 2-3 seconds.",[19,65,66,69],{},[22,67,68],{},"Phosphocreatine"," is then used to rapidly regenerate ATP, extending the duration of intense effort by a few extra seconds.",[19,71,72,73,76],{},"By supplementing with creatine, you ",[22,74,75],{},"increase phosphocreatine stores"," in your muscles, which allows you to:",[78,79,80,84,87],"ul",{},[81,82,83],"li",{},"Lift heavier",[81,85,86],{},"Do more reps at maximum intensity",[81,88,89],{},"Recover faster between explosive sets",[43,91],{},[46,93,95],{"id":94},"scientifically-proven-benefits","Scientifically proven benefits",[97,98,99,115],"table",{},[100,101,102],"thead",{},[103,104,105,109,112],"tr",{},[106,107,108],"th",{},"Benefit",[106,110,111],{},"Evidence level",[106,113,114],{},"Average effect",[116,117,118,130,140,150,161,172],"tbody",{},[103,119,120,124,127],{},[121,122,123],"td",{},"Strength increase",[121,125,126],{},"★★★★★",[121,128,129],{},"+5-15%",[103,131,132,135,137],{},[121,133,134],{},"Muscle mass gain",[121,136,126],{},[121,138,139],{},"+1-2 kg over 4-12 weeks",[103,141,142,145,147],{},[121,143,144],{},"Explosive performance",[121,146,126],{},[121,148,149],{},"Significantly improved",[103,151,152,155,158],{},[121,153,154],{},"Recovery between sets",[121,156,157],{},"★★★★",[121,159,160],{},"Improved",[103,162,163,166,169],{},[121,164,165],{},"Cognition and memory",[121,167,168],{},"★★★",[121,170,171],{},"Emerging benefits",[103,173,174,177,179],{},[121,175,176],{},"Brain health (aging)",[121,178,168],{},[121,180,181],{},"Promising leads",[43,183],{},[46,185,187],{"id":186},"which-creatine-to-choose","Which creatine to choose?",[19,189,190],{},"The market is flooded with different forms: creatine HCL, ethyl ester, kre-alkalyn, micronized creatine... Marketing is intense.",[19,192,193],{},[22,194,195],{},"The scientific truth: creatine monohydrate is the only one to use.",[78,197,198,205,211,216],{},[81,199,200,201,204],{},"✅ ",[22,202,203],{},"Most studied form"," (90% of studies use monohydrate)",[81,206,200,207,210],{},[22,208,209],{},"The cheapest"," (3-5x less expensive than other forms)",[81,212,200,213],{},[22,214,215],{},"Maximum proven effectiveness",[81,217,218],{},"❌ Other forms cost more without any extra demonstrated benefit",[37,220],{},[19,222,223],{},"⚠️ Look for the \"Creapure®\" label on the packaging: it's the German seal guaranteeing the purity and quality of the creatine monohydrate.",[43,225],{},[46,227,229],{"id":228},"dosage-and-timing","Dosage and timing",[14,231,233],{"id":232},"standard-method-recommended","Standard method (recommended)",[19,235,236,237,240],{},"Take ",[22,238,239],{},"3 to 5 g per day",", every day, at any time. Muscle saturation happens in 3-4 weeks.",[14,242,244],{"id":243},"loading-phase-optional","Loading phase (optional)",[19,246,247,248,251],{},"If you want to saturate faster: ",[22,249,250],{},"20 g/day for 5-7 days",", split into 4 doses. Then a maintenance dose of 3-5 g.",[19,253,254],{},"The upside: you feel the effects within 1 week instead of 4. The downside: possible digestive issues at first.",[14,256,258],{"id":257},"when-to-take-creatine","When to take creatine?",[19,260,261,262,265],{},"Scientific verdict: ",[22,263,264],{},"timing barely matters",". Daily consistency is what truly counts. A few nuances:",[78,267,268,274,277],{},[81,269,270,271],{},"Slight preference for ",[22,272,273],{},"post-workout intake with a meal",[81,275,276],{},"With carbs: better absorption (insulin helps transport)",[81,278,279],{},"On rest days: take it anyway, whenever you want",[43,281],{},[46,283,285],{"id":284},"side-effects-and-myths","Side effects and myths",[19,287,288],{},"Creatine is the victim of many myths. Let's clear them up.",[14,290,292],{"id":291},"myths-to-bury","Myths to bury",[78,294,295,302,308,314],{},[81,296,297,298,301],{},"❌ ",[22,299,300],{},"\"Creatine damages the kidneys\"",": no study on healthy subjects has shown this. Over 30 years of hindsight.",[81,303,297,304,307],{},[22,305,306],{},"\"You need to cycle it\"",": false, you can take it year-round without breaks.",[81,309,297,310,313],{},[22,311,312],{},"\"It bloats you up like doping\"",": the initial weight gain (1-2 kg) is intramuscular water retention, not fat.",[81,315,297,316,319],{},[22,317,318],{},"\"Women shouldn't take it\"",": studies show the same benefits in women.",[14,321,323],{"id":322},"real-minor-side-effects","Real (minor) side effects",[78,325,326,333],{},[81,327,328,329,332],{},"⚠️ ",[22,330,331],{},"Water retention",": +1-2 kg in the first weeks (intramuscular, normal)",[81,334,328,335,338],{},[22,336,337],{},"Digestive issues",": rare, mostly during loading or if taken without water",[43,340],{},[46,342,344],{"id":343},"who-is-creatine-useful-for","Who is creatine useful for?",[97,346,347,357],{},[100,348,349],{},[103,350,351,354],{},[106,352,353],{},"Profile",[106,355,356],{},"Recommendation",[116,358,359,367,375,383,391,398],{},[103,360,361,364],{},[121,362,363],{},"Strength training practitioner",[121,365,366],{},"✅ Highly recommended",[103,368,369,372],{},[121,370,371],{},"Explosive sports (sprint, team sports)",[121,373,374],{},"✅ Recommended",[103,376,377,380],{},[121,378,379],{},"Pure endurance sports (marathon)",[121,381,382],{},"⚠️ Limited benefit",[103,384,385,388],{},[121,386,387],{},"Vegetarians / Vegans",[121,389,390],{},"✅ Very useful (no dietary intake from meat)",[103,392,393,396],{},[121,394,395],{},"Older adults (sarcopenia)",[121,397,374],{},[103,399,400,403],{},[121,401,402],{},"Students / cognitive work",[121,404,405],{},"✅ Interesting cognitive benefits",[43,407],{},[46,409,411],{"id":410},"key-takeaways","Key takeaways",[19,413,414,415,418,419,422],{},"Creatine monohydrate is ",[22,416,417],{},"the best value-for-money in sports nutrition",". Safe, cheap, effective, backed by decades of research. If you train and you hesitate between several supplements, always start with this one. ",[22,420,421],{},"3-5 g per day, for life",", and you'll have made the most rational supplementation choice possible.",{"title":424,"searchDepth":425,"depth":425,"links":426},"",2,[427,429,430,431,432,433,434],{"id":48,"depth":428,"text":49},3,{"id":94,"depth":428,"text":95},{"id":186,"depth":428,"text":187},{"id":228,"depth":428,"text":229},{"id":284,"depth":428,"text":285},{"id":343,"depth":428,"text":344},{"id":410,"depth":428,"text":411},"Creatine is the most studied supplement in sports nutrition, proven to boost strength, power and muscle mass. Learn dosage, timing and real benefits.","md","en","C",{},true,"/lexique/en/creatine",{"title":5,"description":435},"lexique/en/creatine","4ri47ZywrAMmLs_RMpYxS1RrQwLmBhjqm0TfYsA8MMs",[446,450,454,458,462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,530,531,535,539,543,547,551,555,559,563,567,571,575,579,583,587,591,595,599,603,607,611,615,619,623,627,631,635,639,643,647,651,655,659,663,667,671,675,679,683,687,691,695,699,703,707,711,715,719,723,727,731,735,739,743,747,751,755,759,763,767,771,775,779,783,787,791,795],{"title":447,"description":448,"slug":449},"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":451,"description":452,"slug":453},"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":455,"description":456,"slug":457},"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":459,"description":460,"slug":461},"Active recovery","Active recovery uses light activity to speed muscle recovery. Find out how to effectively integrate it into your routine.","active-recovery",{"title":463,"description":464,"slug":465},"Adduction","Adduction is a movement that brings a body part toward the body's midline. Opposite of abduction.","adduction",{"title":467,"description":468,"slug":469},"Aerobic System","The aerobic system produces energy with oxygen, fueling long-duration efforts. It's the foundation of endurance and recovery.","aerobic-system",{"title":471,"description":472,"slug":473},"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":475,"description":476,"slug":477},"Anaerobic System","The anaerobic system produces energy without oxygen — for explosive, intense efforts. Limited but powerful, it fuels strength and sprints.","anaerobic-system",{"title":479,"description":480,"slug":481},"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":483,"description":484,"slug":485},"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":487,"description":488,"slug":489},"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":491,"description":492,"slug":493},"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":495,"description":496,"slug":497},"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":499,"description":500,"slug":501},"Bodyweight","Bodyweight training uses your own body as resistance. No equipment, anywhere, scalable to any level.","bodyweight",{"title":503,"description":504,"slug":505},"Calorie Maintenance","Caloric maintenance is the calorie level keeping your weight stable. Foundation of any nutritional plan.","calorie-maintenance",{"title":507,"description":508,"slug":509},"Calorie Surplus","A caloric surplus means consuming more calories than you burn. Mandatory mechanism for serious muscle building.","calorie-surplus",{"title":511,"description":512,"slug":513},"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":515,"description":516,"slug":517},"Calories","Calories measure the energy provided by food. Understanding your caloric needs is the foundation of every fitness goal.","calories",{"title":519,"description":520,"slug":521},"Carbohydrates","Carbohydrates are the main source of energy for intense training. Discover your needs, the different types and their role in performance.","carbohydrates",{"title":523,"description":524,"slug":525},"Circuit training","Circuit training chains several exercises with little rest. Ideal for burning calories and improving cardiovascular fitness while keeping muscle.","circuit-training",{"title":527,"description":528,"slug":529},"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":5,"description":435,"slug":12},{"title":532,"description":533,"slug":534},"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":536,"description":537,"slug":538},"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":540,"description":541,"slug":542},"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":544,"description":545,"slug":546},"Dropset","A dropset extends a set by reducing the load when failure hits. Powerful intensification method for hypertrophy.","dropset",{"title":548,"description":549,"slug":550},"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":552,"description":553,"slug":554},"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":556,"description":557,"slug":558},"Extension","Extension is the anatomical movement that increases the angle between two body segments. Opposite of flexion.","extension",{"title":560,"description":561,"slug":562},"Fat mass","Fat mass is the total weight of fat tissue. Essential for survival, but excess harms health and aesthetics.","fat-mass",{"title":564,"description":565,"slug":566},"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":568,"description":569,"slug":570},"Flexion","Flexion is the anatomical movement that decreases the angle between two body segments. Opposite of extension.","flexion",{"title":572,"description":573,"slug":574},"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":576,"description":577,"slug":578},"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":580,"description":581,"slug":582},"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":584,"description":585,"slug":586},"Hypertrophy","Muscle hypertrophy is the increase in muscle fiber size. It's the primary mechanism behind muscle growth from resistance training.","hypertrophy",{"title":588,"description":589,"slug":590},"Hypertrophy Training","Hypertrophy training aims to maximize muscle growth using moderate loads (65-85% 1RM) with 8-15 repetitions per set.","hypertrophy-training",{"title":592,"description":593,"slug":594},"Intra-workout","Intra-workout refers to nutrition consumed during training to maintain energy, hydration and performance on long sessions.","intra-workout",{"title":596,"description":597,"slug":598},"Isometric","Isometric contraction is when the muscle produces tension without changing length. No visible movement, intense work.","isometric-contraction",{"title":600,"description":601,"slug":602},"Lean mass","Lean mass is everything in your body except fat: muscles, bones, organs, water. A real performance indicator.","lean-mass",{"title":604,"description":605,"slug":606},"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":608,"description":609,"slug":610},"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":612,"description":613,"slug":614},"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":616,"description":617,"slug":618},"Maintenance","Maintenance is the calorie level at which your weight remains stable. The neutral baseline for any nutritional strategy.","maintenance",{"title":620,"description":621,"slug":622},"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":624,"description":625,"slug":626},"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":628,"description":629,"slug":630},"Mesocycle","A mesocycle is a 4-8 week training block with a specific objective (hypertrophy, strength, peak, deload). The cornerstone of periodization.","mesocycle",{"title":632,"description":633,"slug":634},"Microcycle","A microcycle is the smallest planning unit in bodybuilding: generally 1 week of training. This is your weekly routine.","microcycle",{"title":636,"description":637,"slug":638},"Mobility","Mobility is the ability to actively control range of motion. Find out how to improve your mobility to optimize your performance.","mobility",{"title":640,"description":641,"slug":642},"Muscle mass","Muscle mass is the total weight of muscles in the body. Key indicator of strength, metabolism, and longevity.","muscle-mass",{"title":644,"description":645,"slug":646},"Muscular Endurance Training","Muscular endurance training develops the ability to sustain prolonged effort. Light loads, high reps, short rests.","muscular-endurance-training",{"title":648,"description":649,"slug":650},"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":652,"description":653,"slug":654},"Muscular strength","Muscular strength is the maximum force a muscle (or group) can produce. The fundamental physical quality of any athlete.","muscular-strength",{"title":656,"description":657,"slug":658},"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":660,"description":661,"slug":662},"PR - Personal Record","A PR (Personal Record) is your best performance ever on a movement. The fundamental progress marker.","pr-personal-record",{"title":664,"description":665,"slug":666},"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":668,"description":669,"slug":670},"Periodization","Periodization is the cyclical organization of training into distinct phases to optimize progression, prevent plateaus, and avoid injuries.","periodization",{"title":672,"description":673,"slug":674},"Plateau","A plateau is a period of stagnation despite consistent training. Identifying the cause is the key to breaking it.","plateau",{"title":676,"description":677,"slug":678},"Post-workout","The post-workout is the nutrition right after training to optimize recovery and growth. Protein, carbs, hydration.","post-workout",{"title":680,"description":681,"slug":682},"Pre-workout","The pre-workout is the meal or supplement taken before training to optimize performance. Energy, focus, and pump.","pre-workout",{"title":684,"description":685,"slug":686},"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":688,"description":689,"slug":690},"Protein","Protein is the essential macronutrient for building and repairing muscle. Discover your needs, the best sources and the optimal timing.","protein",{"title":692,"description":693,"slug":694},"Protein powder","Protein powders are concentrated protein supplements. Practical for hitting daily protein needs.","protein-powder",{"title":696,"description":697,"slug":698},"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":700,"description":701,"slug":702},"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":704,"description":705,"slug":706},"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":708,"description":709,"slug":710},"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":712,"description":713,"slug":714},"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":716,"description":717,"slug":718},"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":720,"description":721,"slug":722},"Rest-Pause","Rest-pause is an intensification method using ultra-short pauses to extend a set. Powerful tool for hypertrophy.","rest-pause",{"title":724,"description":725,"slug":726},"Sarcomere","The sarcomere is the basic contractile unit of muscle. Composed of actin and myosin, it produces all your movements.","sarcomere",{"title":728,"description":729,"slug":730},"Series (Sets)","A series (or set) is a group of consecutive reps without rest. The basic unit of training programming.","series-sets",{"title":732,"description":733,"slug":734},"Sleep","Sleep is the most underrated training variable. It's during sleep that recovery, muscle building, and hormonal regulation happen.","sleep",{"title":736,"description":737,"slug":738},"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":740,"description":741,"slug":742},"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":744,"description":745,"slug":746},"Stretching","Stretching improves flexibility and range of motion. Learn about the different types and how to effectively incorporate them into your routine.","stretching",{"title":748,"description":749,"slug":750},"Superset","A superset chains two exercises with no rest between them. Time-efficient method that boosts intensity and density.","superset",{"title":752,"description":753,"slug":754},"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":756,"description":757,"slug":758},"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":760,"description":761,"slug":762},"Tabata","Tabata is a 4-minute HIIT protocol: 20 seconds max effort, 10 seconds rest, 8 rounds. Maximum efficiency in minimum time.","tabata",{"title":764,"description":765,"slug":766},"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":768,"description":769,"slug":770},"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":772,"description":773,"slug":774},"Training frequency","Training frequency defines how many times per week you work a muscle. Discover the optimal frequency to progress.","training-frequency",{"title":776,"description":777,"slug":778},"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":780,"description":781,"slug":782},"Training volume","Training volume represents the total amount of work performed. Discover the optimal volumes per muscle per week to progress.","training-volume",{"title":784,"description":785,"slug":786},"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":788,"description":789,"slug":790},"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":792,"description":793,"slug":794},"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":796,"description":797,"slug":798},"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",{"de":800,"en":12,"es":801,"fr":12,"it":801,"pt":801},"kreatin","creatina",1784214981700]