Glossary
Range of Motion
Range of motion (ROM) is how far a joint moves through an exercise — a full ROM means completing the whole movement, not a partial one.
Range of motion is the distance a joint travels during a rep, from the start position to the fully worked position and back. A full squat, for example, goes down until the thighs are at least parallel and back up to standing.
Training through a full range of motion generally builds more strength and flexibility than short, partial reps, and it makes each rep count. That's why REP RUSH calibrates to your personal range at the start of a workout and only counts reps that reach real depth.
Your usable range depends on your mobility — work within a range you can control with good form, and it will improve over time.
Curling only halfway up is a partial rep; bringing the weight all the way to your shoulder and back down is full range of motion.
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