HI Ben, thanks for your interesting post. It would be good if you add the body chart to your history as that helps us visualize more where your issues are felt.
A few questions:
- How did you suffer the foot trauma?
- How was the L2/L3 fracture diagnosed and what treatment did you have for that. Did you have follow-up x-rays or an MRI to check all was healed?
By the sounds of it you might have a pelvic imbalance, perhaps historic, or at least since the foot trauma. The ice skating probably just highlighted this issue rather than resulted in an injury per se. Fast forward to the snowboard accident which could have upset the pelvic alignment as well as possible implications for the restriction free movement of the nerve roots at the same levels. Note that L2/L3 supply innervation and sensation to the upper thigh area with L1 a little more around the anterior groin region. You could also feel weak in the right hip flexors and knee extensors (quads) with altered neural flow to those same areas.
The deadlift of course uses the hips and lumbar spine together as they act across the pelvis. Thus an issue here could be from one or the other or both as a result of piriformis issues. It could also just be a lumbar instability and or disc issue that is exacerbated with the dead-lift rendering the squat weak. You would really need to have someone with a good knowledge of dead-lifting and squatting to take a look at you performing the exercises and then assessing the results and alignment at that time.
I would recommend a sports physio with a special interest in lifting training. There should be plenty but a good place to start is at a sport academy near where you live. Another useful option would be to look for an assessment from someone with an interest in pelvis instability and muscle energy techniques (nordic therapy). Most good Aussie physios have interests in both those. The really need to be able to provoke the symptoms and assess at that time so a center that has access to a gym set up where you can perform the troublesome activity whilst being supervised/assessed would be ideal.
I think Osteitis Pubis is very unlikely as this is more a sprinter or hurdler issue and not one for people whose legs are keep a little closer together as in ice skating.
My gut feeling is that as sitting affects you (and the probing around looking for the focal spot to massage) it might well be that the low back is involved here, perhaps with its relationship to the pelvic musculature (piriformis).
I hope this helps you to seek out the relevant clinic for further assessment as this one is a very difficult one to give more concrete commentary on via a forum.
Let us know how you get on and the results. :-)