It would be interesting to know how the comfort or suitability of these postures is affected by physiology. For example, even the suitability to obtain a deep

It would be interesting to know how the comfort or suitability of these postures is affected by physiology. For example, even the suitability to obtain a deep squat may be affected by things like hip joint geometry: https://www.otpbooks.com/stuart-mcgill-hip-anatomy/ https://www.otpbooks.com/stuart-mcgill-hip-anatomy/