Thanks for the comments,

I assessed Wikipedia reference-linkSIJ and L/S, all to note was slightly stiff end feel to R uni p/a L4/5 (springy but restricted rom)
SIJ clear, leg length L=R
Muscle strength L=R all lower limb
erector spinae L=R
Quad Lumb/ Iliopsoas L=R

pt had 'sciatica' c radiating symptoms to mid post thigh ~ 4 y ago, rx by GP was Wikipedia reference-linkfacet joint steroid inj. (pt. not sure where exactly, ? L4/5) produced relief; no further symptoms.

approx 2 months prior to this complaint, pt changed his pedals (same manufacturer, different model - Time c 15 deg of float)

he is a professional bike mechanic and is pretty sure his set up is correct. I suggested the saddle height +/-, but he's not too keen on that idea !

Spends most of his working day standing working on bikes, even the workstands are raised on blocks to maintain good posture !
doesn't do any other sport, non smoker, non drinker, no previous injuries of note, no other medical problems.


re. muscle tightness/overactivity, forgive my ignorance , but not sure how to determine this, please can you explain ?


thanks again for advice, any further pearls of wisdom much appreciated.