For 20 minutes, every minute on the minute
1. Run a 20 meter sprint, 5 burpees, sprint back
2. Run a 20 meter sprint, 10 pushups, sprint back
3. Run a 20 meter sprint, 5 burpees, sprint back
4. Run a 20 meter sprint, 10 squats, sprint back
Repeat through your 20 minutes.