STEADFAST TRAINING GLOSSARY
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Know your start. Control your finish.
WHAT IS RANGE OF MOTION?
Range of motion, or ROM, is the extent of movement available at a joint or used during an exercise. Joint assessments may express it in degrees. A training plan may describe it through clear starting and finishing positions.
The range used in an exercise is not automatically the maximum range a joint can reach. Your setup, task, and individual restrictions matter.
WHY IT MATTERS
Range changes the movement you are comparing. Eight repetitions through one range and eight through a shorter range are not identical performances.
- Consistency: Define what counts as a repetition.
- Communication: Make setup and movement limits clear.
- Progress tracking: Record deliberate changes in range.
COMMON DISTINCTIONS
| Term | Meaning |
|---|---|
| Full exercise ROM | The complete range defined for that exercise and setup. |
| Partial ROM | A selected portion of that range. |
| Active joint ROM | Movement you produce using your own muscular effort. |
| Passive joint ROM | Movement produced with external assistance. |
“Full” should not mean forcing every person into an identical position. Ask your coach to define the movement endpoints for your exercise.
WHAT DOES THE EVIDENCE SAY?
A 2021 systematic review favored full ROM for strength and lower limb muscle growth across its included comparisons. More recent work adds context: a 2025 upper body study found similar improvements with full ROM and partial repetitions performed in the lengthened portion of the movement.
These findings do not make all partial repetitions equivalent. The exercise, muscle length, and outcome being measured matter. Deliberately programmed partials differ from unintentionally shortening a lift to finish more repetitions.
ROM IN PRACTICE
Use a range you can control within your individual exercise guidance. Persistent pain or a sudden loss of motion calls for assessment, not a demand to force a larger range.
FREQUENTLY ASKED QUESTIONS
Is more range always better?
Not automatically. The appropriate range depends on the exercise, goal, and person. More movement achieved by changing the intended technique is a different task.
Are partial repetitions cheating?
Not when intentionally defined in the program. Unrecorded changes can make progress comparisons misleading.
Are flexibility and ROM identical?
No. ROM describes movement extent. Flexibility is one factor that can influence it; control and the task also matter.
Can increasing range count as progress?
It can be meaningful progress in movement capacity. Record it separately rather than treating it as identical to adding weight.