أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
The development of the sport body is subject to several factors, including, physiological, and morphological, and psychological factors, and mental athlete.
In fact, everyone has different opinions. Some people think you can't sleep with a waist trainer. And others think the opposite. I suggest you listen to the experts. Here https://waisttraineraz.com/can-you-sleep-with-a-waist-trainer-on-and-stay-unaffected/ you will find information on how to properly train your waist. You will also find out if you can sleep with a waist trainer. This answer is definitive and objective. So read on and feel free to listen to the expert guides.
Also genetics, unless you would include that under physiological.
