For instance, I commonly go to the local high school track to exercise. I will lightly stretch for just a few minutes and my first interval will be a 30 second run on the track. I stop and walk for 90 seconds. The next interval I do consists of fast push-ups on the grass for 30 seconds. I then walk for 90 seconds as rest. I then do another run for 30 seconds after which I rest for 90 seconds. Next, I will do pull-ups on the soccer goal posts for 30 seconds and rest with a 90 second walk. Get the idea? I run again for 30 seconds, then rest for 90 seconds. I will do another interval of push-ups for 30 seconds, then rest. Finally, I will run one more interval for 30 seconds, then rest. Done! If I feel I still have energy in the tank, I will run another 2 intervals and call it a day. Try it. It's a great work-out and it's fun to mix and match exercises. You can try other exercises to your liking (bridges, lunges, jumping jacks
1. run for 30 s, rest 90s
2. push-ups for 30s, rest 90s
3. run for 30 s, rest 90s
4. pull-ups for 30 s, rest 90s
5. run for 30 s, rest 90s
6. push-ups for 30 s, rest 90s (stop here if tired)
7. run for 30 s, rest 90s
8. run for 30 s, rest 90s