Jai Sri Ganesha,
Physical posture and mental framework may influence the meditation in its truth,
But when an aspirant reaches a mature stage, he left behind the initial cult of meditation that,
Rather meditation follows the aspirants to help them reach at the destined destination,
At the initial stage, an upright straight column of the spine with head in orientation with self with deep insight thought but they superficial chapter that may differ in truth with the condition of aspirants,
May Lord Bless all,
Thanks, please