Flexibility is generally a good thing. What happens when you're too flexible though...
May 13, 2022
Joint flexibility exists on a continuum, from very tight joints to the pathologically loose joints in such conditions as Ehlers-Danlos or Marfan's syndromes.
Even at the "normal" end of the flexible scale it is not unusual to find that people (many will be children or young adults) complain of painful feet or legs when walking. It puts many of them off exercise. Family walks may not be possible.
You can quickly gain an idea of your flexibility by looking to see if:
elbows and knees hyperextend ("over-straighten")
can touch the floor easily, probably with your palms
the thumb can be bet back to contact the forearm
In these situations Rugby Podiatry can help a great deal with properly-designed custom orthotics and by encouraging strength and conditioning exercises.