Hello,
You may want to check out the website www.hypermobility.org which has an awful lot of information and resources on hypermobility. You did not mention whether you have BJHS or Ehlers-Danlos/Marfans Syndrome, however I am sure you'll find that site very useful.
Have you tried/considered water running, where you're suspended by a belt around your waist and walk/run in the water? It is slightly less taxing on the joints and some HMS patients find it a lot easier.
If you would like any papers/information on HMS please feel free to contact me - I did my MSc project on it!
Ruth Cheesley BSc(Hons) MSc MCSP
Chartered Physiotherapist