Squat Jumps

Try this for a great cardio and toning blitz:

Muscles worked: Quadriceps, Gluts, Hamstrings
Time to Complete: 7 minutes
You will need: Just your body

1. Begin with your feet slightly wider than shoulder width apart and hands on hips.
2. Keeping the knees soft, bend the legs at the knees and hips downward to a half-squat position.
3. From here, immediately explode upward as high as possible, extending the hips, knees, and ankles.
4. Land in the same position as you started (half squat) and return to standing position.

Do this 10-12 times in a row, rest 30-60 seconds, then repeat 2 more times (total of 30-36 jumps).

For a more advanced exercises, try holding a pair of dumbbells, starting with 5 lbs.