What matters most in the process of Yoga is a state of relaxation and an attitude of care. You are learning how to be relaxed in your action. The way in which you practise Yoga should be of great concern.
If you keep plants at home and you care for them they are bound to flourish and grow. The same is true for the body. If you care for your body lovingly through your Yoga practice, then it will grow and become powerful and strong. The same is true for any living thing. When you give it loving care it will be nourished, without a doubt. If you are careless and use fertilisers and pesticides on your beloved plants then they will suffer. Accordingly, if you are out of touch with the needs of your body, and are unaware of its need for nutrition, cleanliness, and daily maintenance it will suffer as a result. Equally, if you feed your body with negative thoughts, judging how it looks with an attitude of worry and stress then, of course, it will suffer. Learn to care less about how you think it should look and care more about how it should be maintained. Just as you avoid putting unnecessary additives onto your plants, apply the same principle to your body, whether the additives are in the form of chemical medicines or toxic thoughts. Learn to give care to your body in every way including through right practice of Yoga.