Humpback is often used to describe the lack of mobility of thoracic vertebrae, often accompanied by bad postures such as round shoulders and chest-lifting, which is called "upper cross syndrome". 90% of the reasons are that the deep muscles in the front of the body, such as pectoralis minor, are tight, and the muscles in the back, such as rhomboid and trapezius, lose their elasticity, such as playing with their heads down for a long time and not paying attention to sitting and standing.

Upper cross syndrome

2. As far as the two sports are concerned.

Regardless of fitness or yoga, if you don't make a detailed training plan and don't pay attention to the posture during training, it will cause this posture. Moreover, both sports also have rehabilitation training for this posture.

To sum up, I personally think that, first of all, improving living habits is more important. Secondly, if you want to start a sport, do it without hesitation.