Common Fitness Terms

The maximum amount of weight you can lift for a single repetition with proper form. Used as a benchmark for programming training intensity.

Perform as many repetitions of an exercise as you can with good form, typically within a set or a given time frame.

A long metal bar (typically 7 feet / 20kg for Olympic) to which weight plates are attached. Allows bilateral loading for compound movements.

A subset of three essential amino acids (leucine, isoleucine, valine) that play a role in muscle protein synthesis. Generally unnecessary if protein intake is adequate.

A training method using bands or wraps to partially restrict blood flow to a muscle during low-load exercise. Can stimulate hypertrophy at lighter weights, often used during rehab.

A ratio of weight to height (kg/m2) used as a general screening tool for body composition. Does not differentiate between muscle and fat, so athletes may score "overweight" while being lean.

The number of calories your body needs at complete rest to maintain basic life functions like breathing, circulation, and cell production.

Exercises performed using only your own body weight as resistance, such as push-ups, pull-ups, squats, and dips. No external equipment required.

The brain and spinal cord. Heavy compound lifts (deadlifts, squats) tax the CNS more than isolation work. CNS fatigue can reduce force output even when muscles feel recovered.

A professional certification demonstrating competence in designing and implementing exercise programs for individuals. Offered by organizations like NASM, NSCA, ACE, and ISSA.

An advanced certification from the NSCA for professionals who train athletes. Requires a bachelor's degree and covers program design, exercise science, and testing protocols.

A short free weight held in one hand. Available in fixed or adjustable varieties. Allows unilateral training and greater range of motion than barbells.

A medical imaging scan that measures bone density, fat mass, and lean mass with high accuracy. Considered one of the gold standards for body composition testing.

Muscle pain and stiffness that typically peaks 24-72 hours after unaccustomed or intense exercise. Caused by microscopic muscle damage during eccentric movements.

A training approach where volume and intensity vary from session to session within the same week rather than progressing linearly over weeks.

The nine amino acids your body cannot produce on its own and must obtain from food. They are critical for muscle protein synthesis and recovery.

A training protocol where you perform a specific exercise at the start of every minute, resting for the remainder of that minute before the next round begins.

A measure of muscularity relative to height. An FFMI above 25 is generally considered near the natural muscular limit for men.

A scale from 0-100 that ranks carbohydrates by how quickly they raise blood sugar. High-GI foods spike insulin; low-GI foods provide steadier energy.

A broad base of fitness (strength, endurance, mobility, coordination) that supports all physical activities.

A hypertrophy-focused program that involves performing 10 sets of 10 reps of a compound exercise at approximately 60% of your 1RM with controlled rest periods.

A cardiovascular training method alternating short bursts of intense effort with brief recovery periods. Effective for improving conditioning and burning calories in less time.

An eating pattern that cycles between periods of fasting and eating. Common protocols include 16:8 (16 hours fasting, 8 hours eating) and 20:4.

A flexible dieting approach where you can eat any foods as long as they fit within your daily macronutrient targets.

A cast-iron weight shaped like a cannonball with a handle. Used for ballistic exercises like swings, cleans, and snatches that develop power and conditioning.

Sustained cardio performed at a low, consistent intensity (e.g., walking, easy cycling) for an extended period. Easier to recover from than HIIT.

The highest training volume at which you are still making gains. Training beyond MAV approaches your maximum recoverable volume.

The lowest amount of training volume needed to stimulate muscle growth. Training below this threshold may maintain muscle but is unlikely to drive new gains.

The conscious focus on contracting and engaging the target muscle during an exercise. Can enhance muscle activation and hypertrophy, especially for isolation work.

The biological process of building new muscle protein. Triggered by resistance training and protein consumption. Elevated for 24-48 hours after training.

The highest training volume from which your body can still recover. Exceeding MRV leads to overreaching and eventually overtraining.

A prominent fitness certification organization known for its Optimum Performance Training (OPT) model and corrective exercise specialization.

Calories burned through daily activities that are not structured exercise, such as walking, fidgeting, household chores, and standing.

A leading professional organization in strength and conditioning. Offers the CSCS and NSCA-CPT certifications.

A compound pressing movement where weight is pushed from shoulder height to overhead. Also called the military press. Targets shoulders, triceps, and upper chest.

An extreme form of intermittent fasting where all daily calories are consumed in a single meal within a one-hour window.

A 4-day training program that combines power-focused days (heavy, low reps) with hypertrophy-focused days (moderate weight, higher reps).

A popular training split that organizes workouts into push movements (chest, shoulders, triceps), pull movements (back, biceps), and leg exercises.

The best performance you have achieved in a given exercise, whether for a single rep, a set of reps, or overall volume.

A hip-hinge exercise performed by lowering the barbell or dumbbells along the legs while maintaining a slight knee bend. Primarily targets the hamstrings and glutes.

How quickly you can generate force. Critical for explosive movements like jumping, sprinting, and Olympic lifts.

The estimated number of additional reps you could perform before reaching failure. RIR 2 means you stopped with 2 reps left in the tank.

The full extent of movement a joint can achieve during an exercise. Training through a full ROM generally leads to better muscle development and joint health.

A scale (typically 1-10) used to measure the subjective intensity of exercise. An RPE of 10 means maximal effort, while RPE 7 means you could do about 3 more reps.

A set structure where you start with your heaviest set first, then reduce weight and increase reps on subsequent sets.

A class of compounds that bind to androgen receptors with tissue-selective activity. Not approved by the FDA for human use and banned in competitive sports.

The three competition lifts in powerlifting. Your total is the sum of your best squat, bench, and deadlift.

How much muscle growth stimulus an exercise provides relative to the fatigue it generates. High-SFR exercises give good stimulus with less systemic fatigue.

Can refer to Mark Rippetoe's "Starting Strength" beginner barbell program, or a superset where two exercises are performed back-to-back with no rest.

The total number of calories your body burns in a day, including BMR, physical activity, the thermic effect of food, and NEAT.

The energy required to digest, absorb, and process nutrients. Protein has the highest TEF (20-30%), followed by carbs (5-10%) and fats (0-3%).

A percentage of your true 1RM (often 85-90%) used as the basis for calculating working weights in programs like 5/3/1.

The total time a muscle is under strain during a set. Increasing TUT by slowing rep tempo can enhance muscle hypertrophy stimulus.

A training split that alternates between upper body and lower body sessions, typically run 4 days per week.

The maximum rate at which your body can consume oxygen during intense exercise. A key marker of cardiovascular fitness.

A term popularized by CrossFit referring to the prescribed workout for a given day. Typically combines varied functional movements at high intensity.

Supplemental exercises performed after main compound lifts to strengthen weak points, address imbalances, or add volume to specific muscle groups.

Light movement (walking, easy cycling, stretching) performed on rest days to promote blood flow and reduce stiffness without adding training stress.

The body's ability to adjust to repeated training stimuli over time. Why progressive overload is necessary for continued gains.

Adjusting training intensity, volume, or exercise selection daily based on how you feel (often using RPE or RIR). Accounts for day-to-day variation in readiness.

A lighter set performed after your heaviest working sets, typically at 10-20% less weight. Used to accumulate extra volume without excessive fatigue.

Exercises that use both limbs simultaneously, such as barbell squats, deadlifts, or bench press. Generally allow heavier loads than unilateral movements.

Dividing training into distinct blocks (accumulation, transmutation, realization) that each emphasize a specific quality. Common in advanced programs.

Tensing and stabilizing your core before and during a lift. Involves taking a deep breath into the belly and tightening the abdominal wall to protect the spine.

A rep performed with intentional deviation from strict form (using momentum) to move a heavier weight or squeeze out extra reps. Should be used sparingly.

Performing a series of exercises back-to-back with minimal rest, then resting after the full circuit. Combines strength and cardiovascular training.

A set broken into smaller mini-sets with brief intra-set rest periods (10-30 seconds). Allows heavier loads for more total reps by managing fatigue.

A multi-joint movement that works several muscle groups at once. Examples: squats, deadlifts, bench press, rows. The foundation of effective training programs.

The phase of a lift where the muscle shortens under load. The "lifting" phase: standing up in a squat, pressing the bar up in bench press.

A planned reduction in training volume and/or intensity (typically 40-60%) lasting about a week. Allows recovery and prepares for the next training block.

The amount of work performed per unit of time. Increasing density by shortening rest periods is one way to progressively overload without adding weight.

An intensity technique where you perform a set to near-failure, immediately reduce weight by 20-30%, and continue for more reps. Can be repeated multiple times.

The phase of a lift where the muscle lengthens under load. The "lowering" phase. Causes more muscle damage than concentric work.

The last ~5 reps of a set performed close to failure, where motor unit recruitment and mechanical tension are highest. These drive the most hypertrophy.

Performing reps until you cannot complete another rep with proper form. Increases stimulus but also fatigue. Best used strategically, not on every set.

A rep completed with assistance from a spotter after you have reached failure on your own. Allows extending a set beyond solo failure.

How often you train a muscle group per week. Research suggests 2-3x per week per muscle group may be optimal for hypertrophy.

Four or more exercises performed back-to-back with no rest. Typically targets the same muscle group from different angles for maximum pump.

A very slow, difficult rep where the weight moves at near-stall speed. Common during maximal attempts. Demonstrates high effort and neural drive.

The increase in muscle size achieved through resistance training. Driven by mechanical tension, metabolic stress, and muscle damage. Typically trained in the 6-15 rep range.

The percentage of your 1RM used on a lift, or how close to failure a set is taken. Higher intensity means heavier weight or closer to failure.

A single-joint movement that targets one muscle group. Examples: bicep curls, tricep extensions, leg curls, lateral raises. Best used as accessories.

A muscle contraction where the muscle generates force without changing length. Examples: holding a plank, wall sits, or pausing at the bottom of a squat.

Sets performed far from failure (RPE 5-6 or lower) that add fatigue without meaningful hypertrophy stimulus. Eliminating junk volume can improve recovery.

The exercise intensity at which lactate accumulates in the blood faster than it can be cleared. Training near this threshold improves endurance.

Adding a fixed amount of weight each session or week. Works well for beginners who can recover and adapt quickly.

The top position of a lift where joints are fully extended. In deadlifts, standing fully upright with hips locked.

The primary driver of muscle growth. The force a muscle produces when contracting against resistance. Heavier loads and controlled reps create the most.

The process of activating motor neurons and their muscle fibers. Heavier loads and proximity to failure recruit more high-threshold motor units needed for growth.

Previously trained muscles regain size and strength faster when retraining after a layoff. The muscle nuclei gained during initial training persist.

A rest-pause technique: perform an activation set to near-failure, rest 3-5 seconds, then do short sets of 3-5 reps. Accumulates effective reps efficiently.

Focusing on the eccentric (lowering) phase, often using a weight heavier than you can concentrically lift. Requires a spotter or machine to assist.

The rapid strength and muscle gains experienced by beginners. Driven by neural adaptations and the untrained body being very responsive to new stimuli.

A short-term accumulation of training fatigue that temporarily decreases performance. Functional overreaching can lead to supercompensation after rest.

A chronic state of excessive training stress without adequate recovery, leading to persistent performance decline, fatigue, and mood changes. Rare but serious.

A rep performed through only part of the full range of motion. Sometimes used intentionally (board press, rack pulls) to overload a specific portion of a lift.

A rep with a deliberate pause (1-3 seconds) at a specific point. Eliminates the stretch reflex and increases time under tension at the hardest position.

The systematic planning of training variables over time to maximize performance and prevent overtraining. Models include linear, undulating, and block.

A period where progress stalls despite continued training. Common causes: insufficient recovery, inadequate nutrition, lack of progressive overload.

Explosive exercises involving rapid stretch-shortening cycles: jumping, bounding, box jumps. Develops power, speed, and reactive strength.

The gradual increase of stress placed on the body during training. Achieved by increasing weight, reps, sets, or decreasing rest. The foundational principle of gains.

Temporary swelling and tightness in a muscle during training, caused by increased blood flow. May contribute to hypertrophy through metabolic stress.

Increasing weight and decreasing reps each set (ascending), decreasing weight and increasing reps (descending), or both (full pyramid).

Take a set to near-failure, rest 10-20 seconds, then continue for additional reps. Extends a set beyond normal failure.

Your body adapts to the specific demands you place on it. Want to get stronger at squats? You need to squat.

The weakest point in a lift where bar speed slows or stalls. For bench press it is often a few inches off the chest; for deadlifts, at the knees.

Two exercises performed consecutively with no rest. Can be antagonistic (opposing muscle groups) or compound (same muscle group).

20 seconds of all-out effort followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total). Originally developed using cycling at 170% VO2 max.

Controlling the speed of each rep phase, written as four numbers (e.g., 3-1-2-0 for 3s eccentric, 1s pause, 2s concentric, 0s pause at top).

Total weight lifted in a session: sets x reps x weight. Example: 4x8 at 200 lbs = 6,400 lbs. One way to track volume over time.

Three exercises performed back-to-back with no rest. Can target the same muscle from three angles or three different muscle groups.

Exercises that work one limb at a time: single-leg squats, one-arm rows, lunges. Helps identify and correct strength imbalances.

Taking a deep breath and holding it while bracing the core during heavy lifts. Creates intra-abdominal pressure to stabilize the spine.

Total work performed, measured as sets x reps (or sets x reps x weight). A primary driver of hypertrophy when performed close enough to failure.

Lighter sets before working sets to increase blood flow, activate muscles, and prepare joints. Ramped up progressively toward working weight.

A set performed at your prescribed training weight and intensity. These are the sets that "count" in your program.

A metabolic state where the body builds tissue. Promoted by adequate protein, caloric surplus, resistance training, and hormones like testosterone.

The debated post-workout period where protein is thought to be most effective. Research shows total daily protein matters far more than exact timing.

How well a nutrient is absorbed and utilized by the body. Animal proteins have higher bioavailability than plant proteins.

Simultaneously losing fat and gaining muscle. Most effective for beginners, those returning from a break, or those with higher body fat.

A period of intentional caloric surplus to maximize muscle growth. "Clean" bulking uses a modest surplus (200-500 cal); "dirty" bulking uses a larger one.

Consuming fewer calories than your body burns. Required for fat loss. A moderate deficit (300-500 cal/day) preserves more muscle.

Consuming more calories than your body burns. Required for optimal muscle growth. 200-500 calories above TDEE is generally recommended.

Alternating between high-carb and low-carb days, typically with higher carbs on training days and lower on rest days.

Consuming high carbohydrates (8-12g/kg) before an endurance event to maximize glycogen stores. Common in marathon and cycling preparation.

A metabolic state where the body breaks down tissue for energy. Prolonged deficits, excessive cardio, and inadequate protein promote catabolism.

The most well-researched sports supplement. Increases phosphocreatine stores for better high-intensity performance. Standard dose: 3-5g daily.

A period of intentional caloric deficit to lose body fat while preserving muscle. Requires high protein, continued heavy training, and moderate deficit.

A planned 1-2 week period of eating at maintenance during a longer diet phase. Helps restore hormonal levels and reduce diet fatigue.

Minerals (sodium, potassium, magnesium, calcium) that regulate muscle contractions, hydration, and nerve function. Lost through sweat.

The stored form of carbohydrates in muscles and liver. Your primary fuel source during moderate-to-high intensity exercise.

Total body weight minus fat mass. Includes muscle, bone, water, organs, and connective tissue. Better than total weight for tracking progress.

A conservative bulking approach with a small surplus (200-300 cal/day). Slower gains but easier to maintain leanness year-round.

The three major nutrient categories: protein (4 cal/g), carbohydrates (4 cal/g), and fats (9 cal/g). Balancing macros affects body composition.

The calorie intake at which your body weight remains stable. Equals your TDEE. Starting point for calculating surpluses or deficits.

Your body's response to prolonged dieting: reduced NEAT, lower BMR, increased hunger hormones. Addressed with diet breaks or reverse dieting.

Vitamins and minerals needed in small amounts for health and performance. Deficiencies (vitamin D, iron, magnesium, zinc) can impair recovery.

The difference between protein intake and protein excretion. Positive nitrogen balance indicates an anabolic state supporting muscle growth.

A planned day of higher calories (primarily carbs) during a cut. Helps replenish glycogen, boost leptin, and reduce diet fatigue.

Gradually increasing calories after a cut (50-100 cal/week) to restore metabolic rate without rapid fat regain.

Fat stored directly under the skin, the kind you can pinch. Less metabolically dangerous than visceral fat. Decreases as you lean out.

Fat stored around internal organs. Associated with increased risk of heart disease and diabetes. Reduced through caloric deficit and exercise.

Temporary weight fluctuations caused by water retention. Influenced by sodium, carbs, stress, and sleep. Not indicative of fat or muscle changes.

A dumbbell shoulder press that starts with palms facing you and rotates to palms forward as you press up. Targets all three deltoid heads.

A barbell squat with the bar on the upper back. One of the most effective exercises for lower body strength and mass.

A single-leg squat with the rear foot elevated on a bench. Challenges balance and targets quads, glutes, and hip stabilizers.

A bodyweight pull using a supinated (underhand) grip. Targets back and biceps, with more bicep involvement than a pull-up.

An Olympic lift pulling the bar from the floor to the front rack position in one explosive motion. Develops full-body power and coordination.

Lifting a loaded barbell from the floor to standing. One of the best exercises for overall strength, targeting the entire posterior chain, grip, and core.

A bodyweight push on parallel bars or a bench. Leaning forward emphasizes chest; staying upright targets triceps.

A cable/band exercise pulling toward your face. Strengthens rear delts, rotator cuff, and upper back. Important for shoulder health.

Walking while holding heavy weights in each hand. Develops grip strength, core stability, traps, and total-body conditioning.

A squat with the barbell on the front of the shoulders. More quad-dominant and requires greater core stability than back squats.

Lying on your back with knees bent, driving hips up by squeezing the glutes. A foundational glute activation exercise.

A squat holding a dumbbell or kettlebell at chest height. Excellent for learning proper squat mechanics. Great for beginners.

A hip-hinge with a barbell on your back, bending forward at the hips. Targets hamstrings, glutes, and lower back.

A loaded glute exercise with upper back on a bench, driving a barbell upward at the hips. One of the most effective glute exercises.

A cable exercise pulling a bar down to your chest. Targets the lats. A common alternative to pull-ups for back development.

A machine exercise pushing a weighted platform with your legs. High quad, glute, and hamstring activation with reduced spinal loading.

A single-leg exercise stepping forward, backward, or laterally. Develops leg strength, balance, and single-leg stability.

An advanced bodyweight movement combining a pull-up with a dip in one fluid motion. Requires significant upper body strength.

A barbell row where the bar returns to the floor between each rep. Emphasizes explosive pulling power and upper back strength.

An isometric core exercise holding a push-up position with a straight body line. Builds core stability and endurance.

A bodyweight pull using a pronated (overhand) grip. Primarily targets the lats and upper back. One of the best upper body exercises.

An Olympic lift taking the bar from floor to overhead in one continuous motion. The most technically demanding barbell lift.

A deadlift with a wide stance and hands inside the knees. Reduces range of motion and shifts emphasis to quads and adductors.

The muscles on the front of the body: quads, hip flexors, abs, pecs, and anterior delts.

The muscles that stabilize the spine and pelvis, including rectus abdominis, obliques, transverse abdominis, erector spinae, and deep stabilizers.

Active movements taking joints through their full range of motion (leg swings, arm circles). Best performed before training.

The ability of a muscle to passively lengthen through a range of motion. Different from mobility, which involves active control.

Self-myofascial release using a foam roller to reduce soreness and improve range of motion. Best as part of a warm-up or cool-down.

A fundamental movement pattern bending at the hips while maintaining a neutral spine. The basis for deadlifts, RDLs, and kettlebell swings.

The ability to actively move a joint through its full range with control and stability. You need both the range (flexibility) and strength to control it.

The muscles on the back of the body: hamstrings, glutes, erector spinae, lats, and rear delts. Key for posture, power, and injury prevention.

Inward rotation. For the forearm, turning the palm down (overhand grip). For the foot, rolling inward during walking/running.

Pulling shoulder blades together and down. Critical for proper bench press setup, rows, and pulling movements. Protects the shoulders.

Holding a stretch for 15-60 seconds. Best after training. Can temporarily reduce force production if done immediately before heavy lifting.

Outward rotation. For the forearm, turning the palm up (underhand grip). A supinated grip on curls provides greater bicep activation.

Rubber-coated weight plates designed to be dropped from overhead. All bumper plates are the same diameter regardless of weight.

A machine using pulleys and cables to provide constant tension throughout the range of motion. Versatile for hundreds of exercises.

Magnesium carbonate applied to hands to improve grip. Especially useful for deadlifts, pull-ups, and Olympic lifts.

A shorter, W-shaped barbell to reduce wrist strain during curls and tricep exercises. The angled grips place wrists in a more natural position.

Neoprene sleeves for warmth, compression, and mild joint support during squats. Not the same as knee wraps, which provide elastic energy.

A thick belt worn during heavy compound lifts. Provides something to brace against, increasing intra-abdominal pressure. Typically used above 80% 1RM.

Straps that wrap around the bar and wrists to reinforce grip. Useful when grip is the limiting factor, not the target muscles.

A four-posted metal cage with adjustable safety bars and J-hooks. Allows heavy squats and bench press safely without a spotter.

Elastic bands providing variable resistance. Used for warm-ups, assistance (banded pull-ups), added resistance, or rehab work.

A barbell fixed on vertical guide rails. Provides stability and built-in safety catches. Different muscle activation than free weights.

A training partner who assists if you fail a rep. Essential for heavy bench press and squat attempts. A good spotter only helps when truly needed.

A hexagonal barbell you stand inside of. Allows a neutral grip deadlift with more upright torso, reducing lower back stress.

A sport focused on developing muscle size, symmetry, and definition. Judged on physique appearance, not strength.

Bodyweight training developing strength, flexibility, and control. Includes pull-ups, dips, push-ups, muscle-ups, handstands, and planches.

A fitness methodology combining weightlifting, gymnastics, and metabolic conditioning in constantly varied, high-intensity workouts.

A coefficient used in powerlifting to compare lifters across weight classes. Considered more accurate than the Wilks score for modern athletes.

A sport consisting of two lifts: the snatch and the clean and jerk. Emphasizes power, speed, mobility, and technique.

A strength sport consisting of squat, bench press, and deadlift. Each lifter gets three attempts, and the best of each is summed for a total.

A sport featuring atlas stones, log press, deadlift for reps, yoke carries, and tire flips. Tests maximal strength and endurance.

The sum of your best squat, bench press, and deadlift in competition. The primary measure of overall strength in powerlifting.

A coefficient to compare lifters across weight classes by normalizing their total relative to body weight. Being replaced by DOTS and IPF GL.

A popular strength program using a training max and monthly progression with three waves of increasing intensity (5s, 3s, 5/3/1). Flexible accessory work.

A system (popularized by Westside Barbell) rotating exercises frequently with max effort and dynamic effort days to develop strength and speed-strength.

A framework organized into three tiers: T1 (heavy compound at 85%+), T2 (moderate compound at 65-85%), and T3 (light accessories for high reps).

A high-volume linear progression based on 5/3/1. Features daily AMRAP sets and many back-off sets. Popular among intermediates. Very demanding on recovery.

A beginner barbell program using 5 sets of 5 reps on compound lifts. Adds weight each session. Simple, effective, and easy to follow for new lifters.