horse back muscles
Equethy - Saddle fit and horse posture notes
Measuring for a saddle.
I found this very helpful. Lots of tips on different things to help you become a better rider.
Leg muscles named so I can figure out which one to work on.
Core Exercises and Horse Riding -
Improving Rider Balance in the Saddle
Core Exercises For The Horse Rider
Physioballs article by Mary Wanless - swiss ball exercises for the rider.
Reflexology diagram for the feet.