What muscles does the Bounds work?

Mainly the quads. It also works the calves, glutes and hamstrings.

What equipment do you need for the Bounds?

None. It is a bodyweight exercise.

GymVim rates it intermediate. For a beginner-rated exercise on the same muscle and movement, see the Box Jump.

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An alternating-leg horizontal bound: an exaggerated running stride that covers distance with a long, springy flight.

Stand tall with the feet close, one foot slightly ahead, and the arms relaxed.
Lean forward a little and load the lead leg without sitting into a deep squat.
Drive that leg into the floor and bound forward, cycling the other knee through.
Land on the opposite foot on the ball of the foot, then bound again immediately.
Keep the torso upright and the legs relatively long rather than tucking into a hop.
Continue alternating legs for the desired distance or number of contacts.

Sitting into a deep squat on each takeoff, which turns the bound into a jump squat.
Landing stiff-legged with a locked knee, which dumps the impact into the joint.
Letting the hips twist so each bound becomes a shuffle instead of a straight stride.
Pausing on every landing instead of using the landing as the next takeoff.

What muscles does the Bounds work?: Mainly the quads. It also works the calves, glutes and hamstrings.
What equipment do you need for the Bounds?: None. It is a bodyweight exercise.
Is the Bounds good for beginners?: GymVim rates it intermediate. For a beginner-rated exercise on the same muscle and movement, see the Box Jump.