Yoga to prevent kyphosis. Kyphosis involves an excessive forward curvature of the spine leading towards rounding or hunching in the upper back. Poor postural habits, sedentary lifestyle and prolonged periods sitting in front of computers can make you more susceptible to this condition. People with kyphosis will often have tight muscles in their upper chest and weak muscles in their upper back. This class features poses that help to prevent kyphosis. It includes poses that open your chest and strengthen the muscles in your upper back. The sequence will also help to improve overall postural awareness.