Where one athlete might shuttle run between cones, an 82-year-old who does little exercise might replace ... Start with one minute of rest after each drill and work that down to 30 seconds.

No equipment (and very little space) necessary. Beginner workout Start with a few warm-up exercises, listed below. Do each one in order (which constitutes one set) and then repeat once more.

A 20-minute HIIT session can incorporate exercises like sprinting, jumping jacks, or burpees, providing a full-body workout that builds strength and endurance. Circuit Training Circuit training ...

You may like No gym needed — instead use this 30-minute dumbbell workout to build full-body strength at home Forget lunges — this 20-minute standing dumbbell workout strengthens the whole body ...

Each cycle will take just under four minutes, and you'll want to complete five cycles. In total, this workout will take about 20 minutes (although it's always a good idea to add a short warm-up ...