Star Jump

Muscles worked

The force comes from the quadriceps across the front of the thigh, which straighten the knee and, just as importantly, control it on the way back down.

A plyometric repetition is over before a slow contraction could contribute anything, so they have to produce that force immediately on contact.

Because more than one joint is moving, the work does not stay in one place: the calves control the ankle and hold the heel position; the glutes finish hip extension; the hamstrings assist hip extension and slow the knee down.

The shoulders take a share of the work as well.

Every exercise for:QuadricepsCalvesGlutesHamstringsShoulders

How this movement works

The working muscles shorten as they drive the load away from you, and more than one joint changes angle to do it. Load spreads down a chain instead of sitting on one muscle, which is why a compound push handles more weight than any single-joint alternative — and why joint position, not the muscle, is usually what fails first.

It is filed under plyometrics, which trains the stretch-shortening cycle: loaded fast, released immediately. Contact time matters more than volume, so these belong early in a session.

What you need

No equipment at all. The resistance is your own bodyweight, so you progress by changing leverage, range or tempo rather than by adding plates — and you can do it anywhere.

Every exercise using:Body only

These train the quadriceps too, using equipment this one does not:

• Step Millmachine
• Step Ups with Barbellbarbell
• Step Ups with Dumbbellsdumbbell
• Cable Deadliftscable
• Front Squats With Two Kettlebellskettlebell

Difficulty

Listed at beginner level: the pattern is simple enough to pick up without coaching, and a position that goes wrong mid-set is obvious enough to correct on the next repetition.

Of the 173 quadriceps exercises in this database, 70 are listed at beginner level.