[{"data":1,"prerenderedAt":785},["ShallowReactive",2],{"lexique-en-bmr":3,"lexique-all-en":430,"lexique-trans-en-bmr":782},{"id":4,"title":5,"body":6,"description":420,"extension":421,"lang":422,"letter":423,"meta":424,"navigation":425,"path":426,"ref":12,"seo":427,"stem":428,"__hash__":429},"lexique/lexique/en/bmr.md","BMR",{"type":7,"value":8,"toc":408},"minimark",[9,13,18,29,36,39,46,49,54,61,80,82,86,89,165,167,171,174,178,181,186,189,194,197,203,209,213,216,223,225,229,236,308,314,316,320,327,360,362,366,373,376,392,394,398],[10,11,5],"h1",{"id":12},"bmr",[14,15,17],"h4",{"id":16},"definition","Definition",[19,20,21,24,25,28],"p",{},[22,23,5],"strong",{}," (Basal Metabolic Rate) represents ",[22,26,27],{},"the number of calories your body burns at complete rest"," to maintain its vital functions: breathing, blood circulation, temperature regulation, organ function, etc.",[19,30,31,32,35],{},"It is the minimum energy your body needs if you stayed lying down all day without moving. BMR makes up ",[22,33,34],{},"60 to 75% of your daily energy expenditure",".",[37,38],"blockquote",{},[19,40,41,42,45],{},"💡 BMR is different from ",[22,43,44],{},"TDEE"," (Total Daily Energy Expenditure), which also includes physical activity, digestion (thermic effect of food), and NEAT.",[47,48],"hr",{},[50,51,53],"h3",{"id":52},"why-know-your-bmr","Why know your BMR?",[19,55,56,57,60],{},"BMR is the ",[22,58,59],{},"foundation of all nutrition calculations",". Knowing it lets you:",[62,63,64,68,71,74,77],"ul",{},[65,66,67],"li",{},"Accurately calculate your TDEE (by adding your activity)",[65,69,70],{},"Set a realistic caloric deficit for cutting",[65,72,73],{},"Calculate your surplus for bulking",[65,75,76],{},"Understand why you gain or lose weight",[65,78,79],{},"Adapt your intake to your goals",[47,81],{},[50,83,85],{"id":84},"factors-that-influence-bmr","Factors that influence BMR",[19,87,88],{},"BMR varies enormously between individuals. The main factors:",[90,91,92,105],"table",{},[93,94,95],"thead",{},[96,97,98,102],"tr",{},[99,100,101],"th",{},"Factor",[99,103,104],{},"Impact on BMR",[106,107,108,117,125,133,141,149,157],"tbody",{},[96,109,110,114],{},[111,112,113],"td",{},"Muscle mass",[111,115,116],{},"+++ (muscle is highly energy-demanding at rest)",[96,118,119,122],{},[111,120,121],{},"Sex",[111,123,124],{},"++ (men generally have a higher BMR)",[96,126,127,130],{},[111,128,129],{},"Age",[111,131,132],{},"-- (BMR drops 1-2% per decade after age 20)",[96,134,135,138],{},[111,136,137],{},"Height / Weight",[111,139,140],{},"++ (taller / heavier = higher BMR)",[96,142,143,146],{},[111,144,145],{},"Genetics",[111,147,148],{},"+/- (natural variation between individuals)",[96,150,151,154],{},[111,152,153],{},"Thyroid hormones",[111,155,156],{},"+/- (strongly influence metabolism)",[96,158,159,162],{},[111,160,161],{},"Outside temperature",[111,163,164],{},"+ (cold slightly raises BMR)",[47,166],{},[50,168,170],{"id":169},"how-to-calculate-your-bmr","How to calculate your BMR",[19,172,173],{},"Several formulas exist. The 2 most accurate:",[14,175,177],{"id":176},"_1-mifflin-st-jeor-formula-recommended","1. Mifflin-St Jeor formula (recommended)",[19,179,180],{},"The most accurate formula for the general population, validated by many studies.",[19,182,183],{},[22,184,185],{},"For men:",[19,187,188],{},"BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5",[19,190,191],{},[22,192,193],{},"For women:",[19,195,196],{},"BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161",[19,198,199,202],{},[22,200,201],{},"Concrete example",": 30-year-old man, 80 kg, 180 cm",[19,204,205,206],{},"BMR = (10 × 80) + (6.25 × 180) - (5 × 30) + 5 = 800 + 1125 - 150 + 5 = ",[22,207,208],{},"1780 kcal/day",[14,210,212],{"id":211},"_2-katch-mcardle-formula-more-accurate-if-you-know-your-body-fat","2. Katch-McArdle formula (more accurate if you know your body fat %)",[19,214,215],{},"BMR = 370 + (21.6 × lean mass in kg)",[19,217,218,219,222],{},"This formula is ",[22,220,221],{},"more accurate for muscular individuals"," because it accounts for actual body composition, not just weight.",[47,224],{},[50,226,228],{"id":227},"from-bmr-to-tdee","From BMR to TDEE",[19,230,231,232,235],{},"Once BMR is calculated, multiply it by an ",[22,233,234],{},"activity coefficient"," to get your TDEE (real caloric needs).",[90,237,238,251],{},[93,239,240],{},[96,241,242,245,248],{},[99,243,244],{},"Activity level",[99,246,247],{},"Coefficient",[99,249,250],{},"Description",[106,252,253,264,275,286,297],{},[96,254,255,258,261],{},[111,256,257],{},"Sedentary",[111,259,260],{},"× 1.2",[111,262,263],{},"Desk job, little to no sport",[96,265,266,269,272],{},[111,267,268],{},"Lightly active",[111,270,271],{},"× 1.375",[111,273,274],{},"Sport 1-3x/week",[96,276,277,280,283],{},[111,278,279],{},"Moderately active",[111,281,282],{},"× 1.55",[111,284,285],{},"Sport 3-5x/week",[96,287,288,291,294],{},[111,289,290],{},"Very active",[111,292,293],{},"× 1.725",[111,295,296],{},"Sport 6-7x/week",[96,298,299,302,305],{},[111,300,301],{},"Extremely active",[111,303,304],{},"× 1.9",[111,306,307],{},"Intense sport 2x/day, athlete",[19,309,310,311,35],{},"Back to the example: if the man trains 4x/week, his TDEE = 1780 × 1.55 = ",[22,312,313],{},"2759 kcal/day",[47,315],{},[50,317,319],{"id":318},"how-to-optimize-your-bmr","How to optimize your BMR",[19,321,322,323,326],{},"Good news: you can ",[22,324,325],{},"increase your BMR"," with a few effective strategies:",[62,328,329,336,342,348,354],{},[65,330,331,332,335],{},"✅ ",[22,333,334],{},"Build muscle mass",": each kg of muscle burns ~13 kcal/day at rest (vs ~5 kcal for fat)",[65,337,331,338,341],{},[22,339,340],{},"High protein intake",": high thermic effect (20-30% of calories burned just to digest)",[65,343,331,344,347],{},[22,345,346],{},"Quality sleep",": lack of sleep lowers BMR",[65,349,331,350,353],{},[22,351,352],{},"Avoid very restrictive diets",": they trigger a downward metabolic adaptation",[65,355,331,356,359],{},[22,357,358],{},"Regular HIIT",": \"afterburn\" effect (EPOC) raises post-workout metabolism",[47,361],{},[50,363,365],{"id":364},"limits-of-formulas","Limits of formulas",[19,367,368,369,372],{},"⚠️ All BMR formulas have a ",[22,370,371],{},"±10-15% margin of error"," compared to lab-measured metabolism.",[19,374,375],{},"For maximum accuracy, you can:",[62,377,378,385],{},[65,379,380,381,384],{},"Get an ",[22,382,383],{},"indirect calorimetry"," test in a clinic (very precise but costly: $100-200)",[65,386,387,388,391],{},"Run a calculated intake for 2-3 weeks and ",[22,389,390],{},"adjust based on real results"," (weight, performance)",[47,393],{},[50,395,397],{"id":396},"key-takeaways","Key takeaways",[19,399,400,401,404,405,35],{},"BMR is ",[22,402,403],{},"the starting point of any serious nutritional strategy",". Calculate it with Mifflin-St Jeor, multiply by your activity coefficient, adjust based on results observed over 2-3 weeks. That is more accurate than any \"trendy\" diet that ignores your individual physiology. ",[22,406,407],{},"Knowing your metabolism = taking control of your results",{"title":409,"searchDepth":410,"depth":410,"links":411},"",2,[412,414,415,416,417,418,419],{"id":52,"depth":413,"text":53},3,{"id":84,"depth":413,"text":85},{"id":169,"depth":413,"text":170},{"id":227,"depth":413,"text":228},{"id":318,"depth":413,"text":319},{"id":364,"depth":413,"text":365},{"id":396,"depth":413,"text":397},"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.","md","en","B",{},true,"/lexique/en/bmr",{"title":5,"description":420},"lexique/en/bmr","MrLYG5s3fooSJgUMCyr6_dPeQHZqFbmF_vdCqp9CwyE",[431,435,439,443,447,451,455,459,463,467,471,472,476,480,484,488,492,496,500,504,508,512,516,520,524,528,532,536,540,544,548,552,556,560,564,568,572,576,580,584,588,592,596,600,604,608,612,616,620,624,627,631,635,639,643,647,651,655,659,663,667,671,675,679,683,687,691,695,699,703,707,711,715,719,723,727,731,735,738,742,746,750,754,758,762,766,770,774,778],{"title":432,"description":433,"slug":434},"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":436,"description":437,"slug":438},"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":440,"description":441,"slug":442},"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":444,"description":445,"slug":446},"Active recovery","Active recovery uses light activity to speed muscle recovery. Find out how to effectively integrate it into your routine.","active-recovery",{"title":448,"description":449,"slug":450},"Adduction","Adduction is a movement that brings a body part toward the body's midline. Opposite of abduction.","adduction",{"title":452,"description":453,"slug":454},"Aerobic System","The aerobic system produces energy with oxygen, fueling long-duration efforts. It's the foundation of endurance and recovery.","aerobic-system",{"title":456,"description":457,"slug":458},"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":460,"description":461,"slug":462},"Anaerobic System","The anaerobic system produces energy without oxygen — for explosive, intense efforts. Limited but powerful, it fuels strength and sprints.","anaerobic-system",{"title":464,"description":465,"slug":466},"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":468,"description":469,"slug":470},"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":5,"description":420,"slug":12},{"title":473,"description":474,"slug":475},"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":477,"description":478,"slug":479},"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":481,"description":482,"slug":483},"Bodyweight","Bodyweight training uses your own body as resistance. No equipment, anywhere, scalable to any level.","bodyweight",{"title":485,"description":486,"slug":487},"Calorie Maintenance","Caloric maintenance is the calorie level keeping your weight stable. Foundation of any nutritional plan.","calorie-maintenance",{"title":489,"description":490,"slug":491},"Calorie Surplus","A caloric surplus means consuming more calories than you burn. Mandatory mechanism for serious muscle building.","calorie-surplus",{"title":493,"description":494,"slug":495},"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":497,"description":498,"slug":499},"Calories","Calories measure the energy provided by food. Understanding your caloric needs is the foundation of every fitness goal.","calories",{"title":501,"description":502,"slug":503},"Carbohydrates","Carbohydrates are the main source of energy for intense training. Discover your needs, the different types and their role in performance.","carbohydrates",{"title":505,"description":506,"slug":507},"Circuit training","Circuit training chains several exercises with little rest. Ideal for burning calories and improving cardiovascular fitness while keeping muscle.","circuit-training",{"title":509,"description":510,"slug":511},"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":513,"description":514,"slug":515},"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":517,"description":518,"slug":519},"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":521,"description":522,"slug":523},"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":525,"description":526,"slug":527},"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":529,"description":530,"slug":531},"Dropset","A dropset extends a set by reducing the load when failure hits. Powerful intensification method for hypertrophy.","dropset",{"title":533,"description":534,"slug":535},"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":537,"description":538,"slug":539},"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":541,"description":542,"slug":543},"Extension","Extension is the anatomical movement that increases the angle between two body segments. Opposite of flexion.","extension",{"title":545,"description":546,"slug":547},"Fat mass","Fat mass is the total weight of fat tissue. Essential for survival, but excess harms health and aesthetics.","fat-mass",{"title":549,"description":550,"slug":551},"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":553,"description":554,"slug":555},"Flexion","Flexion is the anatomical movement that decreases the angle between two body segments. Opposite of extension.","flexion",{"title":557,"description":558,"slug":559},"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":561,"description":562,"slug":563},"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":565,"description":566,"slug":567},"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":569,"description":570,"slug":571},"Hypertrophy","Muscle hypertrophy is the increase in muscle fiber size. It's the primary mechanism behind muscle growth from resistance training.","hypertrophy",{"title":573,"description":574,"slug":575},"Hypertrophy Training","Hypertrophy training aims to maximize muscle growth using moderate loads (65-85% 1RM) with 8-15 repetitions per set.","hypertrophy-training",{"title":577,"description":578,"slug":579},"Intra-workout","Intra-workout refers to nutrition consumed during training to maintain energy, hydration and performance on long sessions.","intra-workout",{"title":581,"description":582,"slug":583},"Isometric","Isometric contraction is when the muscle produces tension without changing length. No visible movement, intense work.","isometric-contraction",{"title":585,"description":586,"slug":587},"Lean mass","Lean mass is everything in your body except fat: muscles, bones, organs, water. A real performance indicator.","lean-mass",{"title":589,"description":590,"slug":591},"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":593,"description":594,"slug":595},"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":597,"description":598,"slug":599},"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":601,"description":602,"slug":603},"Maintenance","Maintenance is the calorie level at which your weight remains stable. The neutral baseline for any nutritional strategy.","maintenance",{"title":605,"description":606,"slug":607},"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":609,"description":610,"slug":611},"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":613,"description":614,"slug":615},"Mesocycle","A mesocycle is a 4-8 week training block with a specific objective (hypertrophy, strength, peak, deload). The cornerstone of periodization.","mesocycle",{"title":617,"description":618,"slug":619},"Microcycle","A microcycle is the smallest planning unit in bodybuilding: generally 1 week of training. This is your weekly routine.","microcycle",{"title":621,"description":622,"slug":623},"Mobility","Mobility is the ability to actively control range of motion. Find out how to improve your mobility to optimize your performance.","mobility",{"title":113,"description":625,"slug":626},"Muscle mass is the total weight of muscles in the body. Key indicator of strength, metabolism, and longevity.","muscle-mass",{"title":628,"description":629,"slug":630},"Muscular Endurance Training","Muscular endurance training develops the ability to sustain prolonged effort. Light loads, high reps, short rests.","muscular-endurance-training",{"title":632,"description":633,"slug":634},"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":636,"description":637,"slug":638},"Muscular strength","Muscular strength is the maximum force a muscle (or group) can produce. The fundamental physical quality of any athlete.","muscular-strength",{"title":640,"description":641,"slug":642},"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":644,"description":645,"slug":646},"PR - Personal Record","A PR (Personal Record) is your best performance ever on a movement. The fundamental progress marker.","pr-personal-record",{"title":648,"description":649,"slug":650},"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":652,"description":653,"slug":654},"Periodization","Periodization is the cyclical organization of training into distinct phases to optimize progression, prevent plateaus, and avoid injuries.","periodization",{"title":656,"description":657,"slug":658},"Plateau","A plateau is a period of stagnation despite consistent training. Identifying the cause is the key to breaking it.","plateau",{"title":660,"description":661,"slug":662},"Post-workout","The post-workout is the nutrition right after training to optimize recovery and growth. Protein, carbs, hydration.","post-workout",{"title":664,"description":665,"slug":666},"Pre-workout","The pre-workout is the meal or supplement taken before training to optimize performance. Energy, focus, and pump.","pre-workout",{"title":668,"description":669,"slug":670},"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":672,"description":673,"slug":674},"Protein","Protein is the essential macronutrient for building and repairing muscle. Discover your needs, the best sources and the optimal timing.","protein",{"title":676,"description":677,"slug":678},"Protein powder","Protein powders are concentrated protein supplements. Practical for hitting daily protein needs.","protein-powder",{"title":680,"description":681,"slug":682},"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":684,"description":685,"slug":686},"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":688,"description":689,"slug":690},"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":692,"description":693,"slug":694},"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":696,"description":697,"slug":698},"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":700,"description":701,"slug":702},"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":704,"description":705,"slug":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},"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},"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},"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},"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},"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},"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},"Superset","A superset chains two exercises with no rest between them. Time-efficient method that boosts intensity and density.","superset",{"title":44,"description":736,"slug":737},"TDEE (Total Daily Energy Expenditure) represents your total daily energy expenditure. Find out how to calculate it precisely to optimize your results.","tdee",{"title":739,"description":740,"slug":741},"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":743,"description":744,"slug":745},"Tabata","Tabata is a 4-minute HIIT protocol: 20 seconds max effort, 10 seconds rest, 8 rounds. Maximum efficiency in minimum time.","tabata",{"title":747,"description":748,"slug":749},"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":751,"description":752,"slug":753},"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":755,"description":756,"slug":757},"Training frequency","Training frequency defines how many times per week you work a muscle. Discover the optimal frequency to progress.","training-frequency",{"title":759,"description":760,"slug":761},"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":763,"description":764,"slug":765},"Training volume","Training volume represents the total amount of work performed. Discover the optimal volumes per muscle per week to progress.","training-volume",{"title":767,"description":768,"slug":769},"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":771,"description":772,"slug":773},"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":775,"description":776,"slug":777},"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":779,"description":780,"slug":781},"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":783,"en":12,"es":12,"fr":12,"it":784,"pt":12},"bmr-grundumsatz","bmr-metabolismo-basale",1784214981288]