Reverse plank crunches

How to do it

1. Set upReverse plank: hands behind you, hips up, legs straight.
2. MovePull both knees in toward your chest, then extend them back out without letting your hips drop.
3. Watch forLetting your shoulders creep up to your ears. Push the floor away.

Easier or harder

Easier

Reverse plank climbers: one leg at a time.

Harder

Pause for a second with the knees tucked.

What it works

Muscles

Core, Upper body

Position

Seated

Intensity

Moderate Medium

Impact

No jumping

Swap it for

• Reverse plank hold
• Reverse plank climbers
• Russian twists
• Body twists
• High plank arm raises
• High plank hold