JUMP ROPE + PUSH-UPS/SIT-UPS
 Jump/Skip rope in 30/30 intervals for twenty minutes performing quick sets of calisthenics during the rest intervals.
   
 This   is a challenging workout, but it is effective and very satisfying to   complete. During the thirty seconds between sets of rope skipping you   will complete a brief set of an additional exercise. Alternate sets of   push-ups and sit-ups so that you perform ten sets of each during the   twenty minutes.
 
 You   do not have long to perform each set. You also will need extra time to   transition from skipping to pushing or crunching and back again. Plan  to  keep the sets small (e.g. 5-20 reps) and allow ~5 seconds for the  first  transition and 5-10 seconds for the transition back to the rope.
 
 Start   with sets of push-ups and sit-ups smaller than you think you can   handle. This is a conditioning drill, not a strength workout.
 
 This does not have to be done at an all-out sprint. Find a rhythm and work from one exercise to the other.
   
 Advanced
Complete ten sets of:
  Intermediate - Basic
  Complete ten sets of:
 -  
30/30 Skipping Rope or Jumping Jacks
 -  
A set of Push-ups (go to your knees if necessary)
   -  
30/30 Skipping Rope or Jumping Jacks
 -  
A set of Crunches
 
 30/30 Interval = 30 seconds work, 30 seconds rest