Dry sand is just about the perfect training ground. Its uneven surface keeps your body guessing, it's forgiving on your joints, and it randomly displaces and shifts under your weight, forcing you to engage more muscle. For this high-intensity workout, mark off a 20-yard stretch of beach (no, probably not a good idea to do this mid-afternoon in high summer). This will be your lane during the regimen. Try for five circuits. After completing one, immediately do 10 push-ups, then rest for 10 seconds before beginning the next circuit.
The Sand Circuit Workout
10 minutes to work every muscle.
Standing Long Jumps
Crouch down and jump forward with both feet. Land and immediately go into the next jump. Do long jumps for 20 yards, turn, and jump back to start position. The key is to jump for height, not for distance, to maximize muscle burn.