Fitness & Training Glossary: 23 Terms Explained

Training has its own vocabulary, and coaches often use it without realizing not everyone speaks it yet. Here are 23 terms you’ll hear around Sculpt Fitness — and anywhere else you train — explained in plain English.

Most Looked-Up Terms

– Endurance
– Spotting
– Rest Interval
– Fitness Assessment
– Circuit Training

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Aerobic-Exercise

Exercise that relies primarily on oxygen to fuel your muscles over a sustained period — think jogging, cycling, or a long swim. Your heart rate rises but stays at a pace you can sustain for an extended time.

Anaerobic-Exercise

Short, intense bursts of effort where your body works faster than oxygen alone can fuel it — sprinting, heavy lifting, or a max-effort set. These efforts can’t be sustained for long, which is exactly what makes them effective for building strength and power.

Body Mass Index (BMI)

A simple ratio of weight to height, used as a rough general population screening tool. It doesn’t account for muscle mass, so a muscular person can show a higher BMI without carrying excess fat — it’s a starting reference point, not a verdict on your health.

Calisthenics

Bodyweight exercises — push-ups, pull-ups, squats, lunges — that use your own body as resistance instead of external weight. A foundational category of training that requires no equipment.

Circuit Training

A workout format where you move through a series of exercises back to back with minimal rest between them, then rest briefly before repeating the circuit. It’s efficient — you get strength and cardio benefits in the same session, which is exactly the format Sculpt’s Small Group Boot Camp is built around.

Cross-Training

Mixing different types of training (strength, cardio, flexibility) or alternating between sports/activities rather than doing the same workout repeatedly. It helps prevent overuse injuries and plateaus that come from doing the exact same movements every session.

Endurance

Your body’s ability to sustain physical effort over time without fatiguing. There are two main types: cardiovascular endurance (how long your heart and lungs can support sustained activity) and muscular endurance (how many times a muscle can contract before it fatigues). Both improve with consistent training, just through different types of work.

Fitness Assessment

A baseline evaluation of your current fitness level — typically strength, mobility, and cardiovascular capacity — done before starting a program so your coach can build something suited to where you’re actually starting from, not a generic template.

High-Intensity Interval Training (HIIT)

Alternating short bursts of maximum effort with brief recovery periods. HIIT is efficient because the intensity of the “on” periods drives results in less total time than steady, moderate-intensity cardio.

Isometric Exercise

A muscle contraction where the muscle doesn’t change length and the joint doesn’t move — think holding a plank or a wall sit. You’re building strength and stability without the muscle actually shortening or lengthening.

Macronutrients

The three nutrient categories your body needs in large amounts: protein, carbohydrates, and fat. Everything on a nutrition label outside of vitamins and minerals falls into one of these three buckets, and getting the balance right is central to Sculpt’s Nutrition Coaching.

Metabolic Rate

The rate at which your body burns calories at rest just to keep basic functions running (breathing, circulation, cell repair). Building muscle through resistance training raises this rate over time, which is part of why strength training supports fat loss even outside of the workout itself.

Overtraining

A state where training volume or intensity outpaces your body’s ability to recover — showing up as persistent fatigue, declining performance, or increased injury risk. It’s a sign to scale back temporarily, not push harder through it.

Plyometrics

Explosive, jump-based movements (box jumps, jump squats) that train your muscles to produce maximum force in minimum time. Builds power, not just strength.

Progressive Overload

Gradually increasing the demand on your muscles over time — more weight, more reps, or more difficulty — so your body keeps adapting instead of plateauing. Read the full breakdown in How to Keep Getting Stronger: The Progressive Overload Method.

Repetition (Rep)

One complete movement of an exercise — one full push-up, one full squat. Reps are grouped into sets (see below).

Resistance Training

Any exercise that works your muscles against a force — weights, bands, or your own bodyweight. Strength training and resistance training are often used interchangeably.

Rest Interval

The recovery time between sets or exercises. How long you rest changes what you’re training for: shorter rest builds endurance, longer rest allows more full recovery for maximum strength output on the next set.

Set

A group of consecutive reps performed without stopping. “3 sets of 10” means 10 reps, a rest, 10 more reps, a rest, then 10 final reps.

Spotting

Having another person stand by during a lift (especially heavy bench press or squat) to assist if you fail to complete the rep safely. A core safety practice, not a sign you’re lifting too much.

Strength-Training

Exercise focused specifically on increasing muscular strength, usually through resistance against weight, bands, or bodyweight. See The 5 Foundational Strength Training Movements for where to start.

Target Heart Rate

The heart rate range you aim for during exercise to hit a specific training effect — generally estimated as a percentage of your maximum heart rate (roughly 220 minus your age, adjusted based on fitness goals).

Warm Up

Preparatory movement before the main workout — light cardio and dynamic stretching that raises your body temperature and primes your joints and muscles, reducing injury risk and improving performance in the session ahead.

Weight Training

Resistance training performed specifically with external weights — dumbbells, barbells, machines — as opposed to bodyweight-only training.

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Ready to Put These Into Practice?

Book your first class at Sculpt Fitness and put this vocabulary to work.