Classic Burpees: 2 Minutes
Works: Cardio, chest, triceps, abdominals, glutes, quadriceps, hamstrings and calves
(A) Lower to a crouched position, placing both hands by feet. (B) Forcefully extend both legs out behind you into a plank position. Keep abdominals tight and do not allow lower back to dip down. (C) Hop both legs back into starting position, then (D) jump up as high as you can with arms up overhead. Return to starting crouched position and repeat for two minutes.
Easier option: Eliminate the final high jump; end in a standing position with your arms reaching overhead.