Why a Weightlifter's Back Pain Was Actually a Left Hip Problem.

The pain traced back to left hip dysfunction, not a primary spine injury, according to Dr. Aaron Horschig's examination. The athlete, who always split with her left leg behind her during clean and jerks, developed back pain that showed up specifically during heavy lifts.

On spine assessment, flexion was completely pain-free, but extension and left side bending immediately reproduced her symptoms. That pattern pointed away from a generic 'back injury' and toward a specific movement fault tied to her split jerk setup.

Dr. Horschig used a sequence of specific tests to move from spine symptoms to the actual root cause in the hip. Here's the order he followed:

1. Spine posture and movement screen – flexion was pain-free; extension and left side bending reproduced pain.
2. Sorensen test – she fatigued after only 2 minutes, showing her lumbar extensors were strong but lacked endurance.
3. Left side Faber test – revealed limited hip mobility on that side.
4. Hip extension test – limited left hip extension triggered low back discomfort.
5. Side plank leg lift – showed noticeably weaker lateral hip endurance on the left side.

Putting it together, Dr. Horschig concluded her left hip wasn't providing enough mobility and stability, so during the split jerk she compensated by extending and rotating through the spine instead.

She could squat heavy without pain because her core stayed braced throughout the entire lift, according to Dr. Horschig. The squat doesn't require the same hip extension and brace release that the split jerk does.

The moment she relaxed her brace slightly and walked the bar back into the rack — a motion needing hip extension — her symptoms reappeared. This confirmed the diagnosis: lumbar extension with left rotation intolerance associated with left hip dysfunction, not a loading capacity issue.

Dr. Horschig fixed the issue with stability work instead of hip stretches, since the athlete was already very mobile. Stretching an already-mobile joint would have added more instability, not less.

His progression:

1. McGill Big 3 with 10-second holds to build baseline lumbar and core stability.
2. Modified side planks with the top leg lifted, targeting the glute medius to stabilize the hip.
3. Offset suitcase walks using a weight hanging off a bamboo bar to challenge asymmetrical core control.
4. Stir the pot to further build core stability.

The result: her hip mobility improved immediately, even though her hip was never stretched once — supporting the idea that a stability deficit, not a tightness problem, was driving her limited range of motion.