The adductor longus muscle arises in the groin from the pelvis and runs down the inside of the thigh to attach to the middle of the thigh bone. It is one of three adductor muscles and their main action is to bring the leg back towards the midline.
Injury usually happens through overuse such as in working a horse while riding – thus ‘rider’s strain’. It may be injured at its attachment to the pelvis or where the tendon meets the muscle (musculotendinous junction). Pain will be provoked by pulling the leg towards the midline against resistance and by stretching the area by taking the leg to the end of range away form the mid line.
Physiotherapy can help with treatment including soft tissue massage and a specific massage technique called frictions across the tender area. Ice and electrotherapy may be used, particularly ultrasound, to relieve pain and the promote healing. Care must be taken not to stretch too soon as healing could be delayed. Advice will be given for the return to full activity.
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