i know this might sound like something from the left field but please hear me out...i had very VERY severe tendonitis, tennis elbow, arthritis the works, all from playing sports pretty much all my life, up until the age of 39 is when i found out all my suffering was due to eating factory farm cheese, meats etc. which are all injected with hormones, fed GMO grains etc. so i decided to stop eating factory farmed junk and moved to grass fed cheese, pasture raised meats etc. and to my surprise, all my pain has diminished completely. we have been fed poison all our lives and no body seems to put the blame on foods we eat,,,humans are meant to walk long distances, we are meant to move aned use our bodies to the max, even with this wonderful kite sports, people tend to think...well, im in pain it must be from old age or from sports,,,far from the truth..you really are what you eat...i would say for the most part 80% of the time your issues are from the foods you eat..hope this helps somewhat, im just very sad to find this out after 30 years of suffering,,but never too late to change the way we eat. cheers and happy gliding