Legs / Intermediate / Compound (multi-joint)

BOSU Forward Lunge

Stepping forward onto the dome into a lunge and holding it still: landing control for the knee and ankle.

At a glance

Primary

Quads, Glutes

Secondary

Hamstrings, Feet (arch & toes), Outer shins (peroneals), Hip abductors (glute med)

Equipment

BOSU ball

Movement pattern

Single-leg / lunge, Single-leg balance

Level

Intermediate

Type

Legs, Compound (multi-joint), One side at a time, Balance / unstable

Loads the knee. Use a load you can control and skip it if it causes pain.

How to do it

1. Stand about one long step behind the BOSU, dome up.
2. Step forward onto the centre of the dome and sink into a lunge, the front knee over the middle of the foot.
3. Hold the bottom for a second, until the front leg is steady.
4. Push back to the start and repeat, alternating legs.

Tips

• Land softly and hold still before you push back.
• Keep the front knee from falling inward.

Common mistakes

• ✗ Standing near the rim of the dome.

  Why it hurts: The rim tips most easily, so the BOSU rolls and the ankle can roll with it: the very sprain the exercise is meant to prevent.

  ✓ Instead: Keep the feet over the middle of the dome, and hold a wall or rail until you can stand still.

• ✗ Letting the knee fall inward as you squat or lunge.

  Why it hurts: On a wobbly surface the knee collapses inward more easily, which strains the inner knee and loads the ACL.

  ✓ Instead: Point the knee over the second toe and go less deep until you can keep it there.

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