Today's workout is a 21-15-9.
Perform 21 repetitions of the first exercise, followed by 21 repetitions of the next exercise. Repeat for 15 reps and 9 reps. Complete this workout as fast as possible.
- Double Kettlebell Swings
- Box Jumps
This is a metabolic burner, and you should be exhausted by the end.
B.Kin, Canadian Society of Exercise Physiology
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