High-intensity interval training (HIIT) means different things to different people. For some, it’s about sprinting on a track or pounding away on a rowing machine.

For others, HIIT means battling through a CrossFit-style regimen of burpees, pullups, and box jumps. Still ,others think of HIIT as a grueling outdoor workout simulating the challenges found in an obstacle race.

There’s no right or wrong answer, but come summer your HIIT sessions should take the form of beach workouts (if you live by the water.