Running in Place
Not a bad exercise on the ground, but is even better when done in a swimming pool. Add a baseball cap and a clip-on metronome attached to the cap, and you’ve got not only an excellent running drill, but also an excellent active recovery “run” to mix into your training program. Don’t set the metronome beat to anything less than 180 bpm. See about getting the beat count up to 215 for some workouts.