Chest opener jacks

How to do it

1. Set upFeet together, arms straight out in front at shoulder height.
2. MoveJump out as you swing your straight arms wide, squeezing your shoulder blades together, then jump in as your arms come back to the front.
3. Watch forArching your lower back as your arms open. Squeeze your shoulder blades together.

Easier or harder

Easier

Step out instead of jumping.

Harder

Seal jacks: faster, with a clap.

What it works

Muscles

Cardio, Quads, Upper body

Position

Standing

Intensity

Moderate Medium

Impact

Jumping

Swap it for

• Punch up jacks
• Jacks + side punch
• Butt kicks
• Standing jacks (low impact)
• Jumping jacks
• Seal jacks

In these workouts

• Upper-Body HIIT Workout