If you like to run, bike, row or swim — just a little bit — this workout is a great option for you.
1. Warm up for 2 minutes.
2. Pedal, run or swim all-out for 20 seconds.
3. Pedal, run or swim slow and easy for 2 minutes.
4. Pedal, run or swim all-out for 20 seconds.
5. Pedal, run or swim slow and easy for 2 minutes.
6. Pedal, run or swim all-out for 20 seconds.
7. Cool down for 3 minutes.
Do this three times a week, for a total of 30 minutes of weekly exercise.