To understand how yoga helps our joints, we must first fully understand what a joint is. A joint is where two bones meet. Some joints you can't move, like those in our skull, others are slightly or freely movable.
To make it simple: joints are the connective tissue that holds our bones together. Each joint has a limited range of motion. When you are strechting and lengthening your muscles during a practice, you can actually improve your joints natural range of motion. You will feel a lot lighter and daily movements like picking something up or reaching for something, will become much easier.
When you do bodyweight exercices in Yoga like the asanas Chaturanga or Upward Dog, you are strengthening the muscles, thus relieving stress and strain on your joints.
People who are overweight tend to go running as everyone tells them it is the quickest way to shed the extra pounds.
However, they forget the impact this excess bodyweight has on their muscles and most importantly, the strain it puts on their joints.
Yoga, combined with a healthy diet, is a much safer way to loose the excess weight, while strenghtening the joints.
Still not convinced yoga is for you? Come back tomorrow to see what DAY 5 has in store for you.
Btw: needless to say that the woman in the photograph has VERY movable joints and she didn't get them by going for a jog ;)