"Blackjack"
For time:
20-19-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1 Sit-ups
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20 Push-ups

Do 21 sit-ups and 1 push-up, then 20 sit-ups and 2 push-ups, then 19 sit-ups and 3 push-ups...continuing until you get to 1 sit-up and 21 push-ups.

Beginner: Start at 11 and work down to one. (11 sit-ups and 1 push-up, then 10 sit-ups and 2 push-ups...until you get to 1 sit-up and 11 push-ups). Scale push-ups and sit-ups to your ability.

Intermediate: Start at 16 and work down to one. (16 sit-ups and 1 push-up, then 15 sit-ups and 2 push-ups...until you get to 1 sit-up and 16 push-ups)

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