Core strenght builder Workout

100 mountain climbers
100 speed steps
80 mountain climbers
80 double unders
80 air squats
60 mountain climbers
60 air squats
60 bicycles
60 speed steps
40 mountain climbers
40 air squats
40 bicycles
40 walking lunges
40 backwards jumps
20 jumps on one foot, then the other
20 mountain climbers
20 air squats
20 bicycles
20 walking lunges
20 burpees