| Standard rep range for strength | 1–5 reps at high load (NSCA Essentials of Strength Training and Conditioning) |
| Standard rep range for hypertrophy | 6–12 reps at moderate load (NSCA Essentials of Strength Training and Conditioning) |
| Standard rep range for muscular endurance | 15+ reps at lower load (NSCA Essentials of Strength Training and Conditioning) |
| Typical rest between strength sets | 2–5 minutes (American College of Sports Medicine guidelines) |
| Typical rest between hypertrophy sets | 60–90 seconds (American College of Sports Medicine guidelines) |
| Minimum weekly aerobic activity (moderate intensity) | 150 minutes (Physical Activity Guidelines for Americans, U.S. DHHS) |
Why Fitness Vocabulary Matters
Training plans, class descriptions, and fitness apps are packed with shorthand that can leave newer exercisers guessing. When you know what terms like periodisation or RPE actually mean, you can interpret instructions accurately, adjust intensity sensibly, and communicate progress clearly — whether you're working with a coach or going it alone.
This reference covers the core vocabulary that appears across both strength and cardiovascular programming. Use it as a lookup resource whenever a new term surfaces in your plan. For a broader introduction to building a training routine from scratch, see our complete guide to working out at home.
Rep (Repetition)
One complete execution of an exercise movement from start position back to start position. Rep count is the primary unit of training volume in resistance programming.
Set
A group of consecutive reps performed without a rest interval. Most programs specify both set count and rep count (e.g., 4×8 means four sets of eight reps).
Progressive Overload
The principle of incrementally increasing training stress — via load, volume, density, or difficulty — to continually drive physiological adaptation. Without it, fitness gains plateau.
Periodisation
The systematic planning of training across time, dividing programs into phases that vary intensity and volume to optimise adaptation and reduce overtraining.
VO₂ Max
The maximum volume of oxygen the body can utilise per minute during maximal exercise, measured in mL/kg/min. Higher values indicate greater aerobic capacity.
RPE
Rate of Perceived Exertion — a subjective scale used to quantify how hard exercise feels. A score of 7/10 RPE means the effort feels hard but sustainable for a limited time.
Lactate Threshold
The exercise intensity at which lactate builds in the bloodstream faster than it is cleared, causing fatigue. Training near this threshold improves sustained endurance performance.
Hypertrophy
An increase in the cross-sectional size of muscle fibres resulting from resistance training stimulus, sufficient protein intake, and recovery. Often targeted with moderate loads for higher reps.
1RM (One-Rep Maximum)
The maximum load that can be lifted for a single controlled repetition of an exercise. Used as a benchmark to prescribe relative training intensities (e.g., 75% of 1RM).
HIIT
High-Intensity Interval Training — a method alternating short bouts of near-maximal effort with recovery periods. Shown to improve aerobic and anaerobic fitness efficiently.
Zone Training
A heart-rate-based framework dividing exercise intensity into distinct zones (typically 1–5), each targeting different physiological adaptations from aerobic base building to speed development.
Tempo
The prescribed speed of each phase of a lift, usually written as a four-number code indicating seconds for the eccentric (lowering), pause, concentric (lifting), and top-pause phases.
Strength Training Terms
The language of resistance training is built on a handful of foundational concepts. Mastering them helps you read any program and make safe, effective adjustments.
| Standard rep range for strength | 1–5 reps at high load (NSCA Essentials of Strength Training and Conditioning) |
| Standard rep range for hypertrophy | 6–12 reps at moderate load (NSCA Essentials of Strength Training and Conditioning) |
| Standard rep range for muscular endurance | 15+ reps at lower load (NSCA Essentials of Strength Training and Conditioning) |
| Typical rest between strength sets | 2–5 minutes (American College of Sports Medicine guidelines) |
| Typical rest between hypertrophy sets | 60–90 seconds (American College of Sports Medicine guidelines) |
| Minimum weekly aerobic activity (moderate intensity) | 150 minutes (Physical Activity Guidelines for Americans, U.S. DHHS) |
- Rep (Repetition): One complete movement cycle — for example, lowering and raising a dumbbell through a full curl. Rep count controls training volume and stimulus type.
- Set: A group of consecutive reps performed without rest. Three sets of ten reps is written as 3×10.
- Tempo: The speed of each phase of a lift, often written as a four-digit code (e.g., 3-1-2-0 = 3 sec down, 1 sec pause, 2 sec up, 0 sec pause). Slower tempos increase time under tension.
- 1RM (One-Rep Maximum): The maximum load you can lift for exactly one complete, controlled repetition. Percentages of 1RM are used to prescribe training intensity (e.g., 70% 1RM for hypertrophy work).
- Progressive Overload: Gradually increasing the demand placed on the body — through added weight, reps, sets, or reduced rest — so adaptation continues over time.
- Periodisation: Organising training into planned phases (blocks) that vary volume and intensity systematically to peak performance and reduce overtraining risk. Common models include linear, undulating, and block periodisation.
- Hypertrophy: An increase in muscle fibre size driven by sufficient volume, progressive overload, and adequate protein intake. Typically targeted with moderate loads and moderate-to-high rep ranges.
If you train without a gym, many of these principles apply directly to bodyweight work. The home trainer's exercise glossary covers how terms like AMRAP and tempo translate to equipment-free sessions.
Cardio and Conditioning Terms
Cardiovascular programming has its own vocabulary, much of it drawn from exercise physiology. These are the terms you'll encounter most often in endurance and conditioning plans.
- VO₂ Max: The maximum rate at which your body can consume oxygen during intense exercise, expressed in mL/kg/min. It is widely regarded as a strong indicator of aerobic fitness and cardiovascular health.
- RPE (Rate of Perceived Exertion): A self-reported scale — most commonly 1–10 or the 6–20 Borg scale — used to gauge exercise intensity based on how hard an effort feels. RPE allows intensity prescription without requiring heart rate equipment.
- Lactate Threshold: The exercise intensity at which lactate accumulates in the blood faster than the body can clear it. Training at or near this threshold improves sustained endurance performance.
- Zone Training: Dividing exercise intensity into defined heart-rate zones (commonly Zones 1–5) to target specific physiological adaptations. Lower zones build aerobic base; higher zones develop speed and anaerobic capacity.
- HIIT (High-Intensity Interval Training): Alternating short bursts of near-maximal effort with recovery periods. Research supports its effectiveness for improving both aerobic and anaerobic fitness in shorter session durations.
- Steady-State Cardio: Sustained aerobic exercise at a consistent moderate intensity — such as a 30-minute jog held at a conversational pace. Builds aerobic base and supports recovery.
These concepts are equally useful when training away from home. Explore how to apply them in the fitness while traveling hub.
This article is for general informational purposes only and does not constitute medical or personal training advice. Consult a qualified healthcare or fitness professional before beginning or significantly changing an exercise program, especially if you have a health condition or injury.