An analysis of 407 papers.
Most studies identified similar physiques based on: physical traits (small size and low body mass), a body type (predominance of ecto-mesomorphy), body composition (low fat mass), and maturity status (late skeletal maturity as well as late age-at-menarche).
However, there was no consensus as to whether these features predicted competitive performance, or even differentiated between gymnasts within distinctive competitive levels. …
The Physique of Elite Female Artistic Gymnasts: A Systematic Review (2017)
by Sarita Bacciotti, Adam Baxter-Jones, Adroaldo Gaya, and José Maia
Gymnastics Coaching.com 