After 20 minutes of jogging, you will push yourself almost to the limit for 30 seconds and then jog very slowly for 30 seconds, before starting again and completing a total of 10 repetitions.
Finish the session with a 10-minute warm-down (without exceeding 65% of your maximum heart rate) to relax the muscles and gradually lower the pulse.
You will recover more quickly and your body will cope with the following session better.