2: Jump crunches
- Bend your knees a little, and draw your palms back.
- Bounce straight up, looking to carry your knees as high as you could.
This workout requires an extra attempt than the others. It isn’t easy to do 30 jumps in your first strive, so it’s better to divide them into 3 units of 10 reps with a one-minute rest in among.
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