Fitness Glossary

Every fitness term, defined plainly.

Fifteen entries. Each one answers what the term means, how it is calculated, and which free Zealova calculator puts it to work. Citations included.

One-Rep Max (1RM)

The maximum weight you can lift for a single rep, the universal benchmark for strength programming.

Every calorie you burn in a day. BMR plus food digestion, exercise, and daily movement.

Calories your body burns at complete rest to keep organs, brain, and cells running.

Protein, carbohydrates, and fat. The three energy-yielding nutrients that make up every calorie you eat.

Gradually increasing training demand over time. The single non-negotiable principle of getting stronger or bigger.

Reps in Reserve and Rate of Perceived Exertion. How lifters quantify set intensity without a 1RM test.

A planned reduction in training volume or intensity to dissipate fatigue and supercompensate.

Phases of intentional fat loss or muscle gain through controlled calorie deficits and surpluses.

A 4 to 6 week training block that ramps volume from MEV to MRV, then deloads.

A sex-adjusted bodyweight coefficient that lets powerlifters across weight classes compare totals.

The share of your body weight that is fat tissue, as opposed to muscle, bone, and water.

The 90-minute NREM-to-REM rotations your brain runs all night. Waking between cycles feels best.

Time-restricted eating protocols like 16:8 and OMAD that compress all calories into a fixed window.

The maximum volume of oxygen your body can use per minute. The gold-standard aerobic fitness marker.

Conversational-pace aerobic training at 60 to 70 percent of max heart rate. Builds the mitochondrial base.

Want the calculators directly?