Exercise Library / Jumping Jack
Jumping Jack
The warm-up that never gets old — rhythm, coordination and heart rate.
Muscles worked
Primary Shoulders
Tap a muscle to explore it on the interactive muscle map.
How to do it
- Start tall, feet together, arms at your sides.
- Jump your feet out wide as your arms sweep overhead.
- Land softly on the balls of your feet, knees gently bent.
- Snap back to the start in one springy beat.
- Keep a steady rhythm — smooth beats fast.
Common mistakes
- Narrow, shuffled feet. If the feet barely leave shoulder width, the hips and calves never actually work.
- Half-mast arms. Stopping the arms at shoulder height cuts the shoulder work and shrinks the movement.
- Heavy flat-foot landings. Thudding down flat-footed jars the knees and breaks the exercise's spring rhythm.
What the camera coach watches
These are the exact checks FitFormBuddy runs on every rep of jumping jack — and what it says when you drift:
- Foot width on the out-jump“jump your feet out wider”
Get real-time form cues on this exercise
FitFormBuddy watches through your camera and coaches you mid-set — reps counted, mistakes called out as they happen.
