It’s widely known that competitive gymnasts have excellent bone density. Some of that research was done at my old stomping grounds, the University of Saskatchewan.
But this was new to me:
… Young recreational and precompetitive gymnasts had, on average, 23% greater bone strength at the wrist compared to children participating in other recreational sports. …
OSTEOPOROSIS INTERNATIONAL – Precompetitive and recreational gymnasts have greater bone density, mass, and estimated strength at the distal radius in young childhood
M. C. Erlandson & S. A. Kontulainen & A. D. G. Baxter-Jones
They surveyed 120 children age 4-9yrs-old.
Of course developing good bone density, especially in the growing female athlete, helps prevent Osteoporosis later in life.
M. C. Erlandson I know as ‘Marta“, one of my gymnasts from some years ago. She’s peeking out from atop the bleachers.
Gymnastics Coaching.com 