Thanks foe the reply - I believe from what I know of my own body, and my history, is that the tightness and knots came from overcycling about 6 years back - never stretched and commuted for many miles weekly. Cycling is famous for tightening the hams....and I think that this, along with postural issues causes problems.

However, I have worked for years as I said on posture, and that really helps. But I feel, intuitively, that if the hams are knotted, they can never fully stretch, and in times of tension, like now when I have some big life changes, things tighten even more. My work is as a therapist, so I know how much tension and tight emotion translate into the body....but those darn knots have been there 6 years, and everything else I do can only go so far.

I have had full examination by NHS physio and several osteo in the past. None spotted the knots though, only massage therapists did (and me). Trouble is, they are tight & knotted when you feel them, but I have a lot of flexibility and can raise leg to 90 degrees no prob when lying on my back. Physio before gave me stretches and strengthening exercises, all great, but it's like stretching a knotted rope!