The single leg hop with perturbations is a dynamic plyometric exercise designed to improve lower limb power, balance and reactive stability. It challenges the muscles of the hip, knee and ankle—particularly the gluteals, quadriceps, hamstrings and calf complex—while also training proprioception and neuromuscular control. The added perturbations (external pushes or disturbances) increase the demand on joint stability and help prepare the body for unpredictable forces encountered in sport. Beginning with backward perturbations and progressing to forward perturbations gradually increases the challenge to the knee and ankle.
- Stand tall on one leg with your knee slightly bent and your pelvis level.
- Engage your core and keep your chest upright.
- Perform a small controlled hop upwards (vertically), landing softly on the same leg.
- Land through the ball of your foot and then lower your heel, absorbing the force by bending through your hip and knee.
- As you stabilise after landing, have a partner apply a gentle, quick perturbation from behind (backwards direction).
- Resist the force and maintain your balance without letting your knee collapse inwards.
- Hold the landing position momentarily, regaining full control before the next hop.
- Once you can control backward perturbations confidently, progress to perturbations applied from the front.
- When receiving forward perturbations, focus on preventing your knee from shifting excessively backwards and maintain strong hip control.
- Keep your knee aligned over your second toe throughout.
- Complete repetitions as prescribed by your physiotherapist.