A Back Bay Boxing Class FAVORITE!!!! 1- to-10 and back again is a 15 or 20 minute pyramid routine (depending on your fitness level). 4 exercises - pushups, burpees (with a pushup of course), jumping jacks, and squats. You complete 1 rep of each exercise, then 2 reps of each, the 3 reps of each...all the way to 10 reps of each exercise and all the way back down. Complete explanation: 1 pushup, 1 burpee, 1 jumping jack, 1 squat 2 pushups, 2 burpees, 2 jumping jacks, 2 squats... then 3 of each, 4, 5, 6, 7, 8, 9, 10...then.....9, 8, 7, 6, 5, 4, 3, 2, 1 When you are done you will have completed 100 reps of each exercise :) Oh...and you're trying to get it done in under 15 or 20 minutes (depending on your fitness level).