I was experiencing similar symptoms to the OP some months ago. At the time I was seeing a Physiotherapist about a shoulder injury. I mentioned the leg pain. etc to her and asked about these machines. She said not to waste my money, they were an expensive fad and gave no more relief than exercises, weight control and increases mobility.
Stabbing at a school in Wales this lunchtime.
To think that London, or anywhere else for that matter, does not belong to any one demographic