Fortunately, the body has a natural counterbalance to the “fight or flight” response, called the parasympathetic nervous system or the “relaxation response.” The parasympathetic nervous system becomes activated when the threat or stressor has passed or ended, but it can also be consciously activated by deepening the breath and by relaxing the skeletal muscles.
When activated, the parasympathetic nervous system lowers blood pressure, heart rate and respiration (the pace of the breath). Digestion and elimination are allowed to be stimulated and blood is free to travel to the digestive, reproductive, glandular and immune systems —systems necessary for the promotion of long-term health. The “relaxation response” is also known as the “rest and renew” stage, when the body has the time and resources to heal the body and to respond to illness. Obviously, by increasing the frequency, time and depth of the “relaxation response” we not only allow our body to recover from illness and disease, but we also practise preventive medicine by allowing the body to perform all of its essential maintenance tasks.
Yoga’s emphasis on long, deep breathing and conscious relaxation activates the parasympathetic nervous system and promotes its “rest and renew” functions. In fact, a recent study has shown yoga to decrease the level of the stress hormone cortisol in the blood. The meditative practices of yoga help to reduce the responsiveness of the mind to stressors and to lessen the intensity of the “fight or flight” response. Yoga also teaches us to see potential stressors as challenges rather than threats, enabling one to avoid the stress response entirely.
The inverting, twisting and compressing that occur in yoga postures enhance the circulation of blood and body fluids. This increase in circulation not only improves the body’s ability to deliver the materials needed to allow healing to take place, but also activates the lymphatic system to maintain normal functioning of the immune system and inflammation response. Yoga poses also improve muscle strength, flexibility and range of motion, all very important for the healing and prevention of musculoskeletal diseases such as arthritis and osteoporosis.
1. What is the parasympathetic nervous system or the relaxation response?
2. How can parasympathetic nervous system be consciously activated?
3. What is the other name for relaxation response?
4. When does body perform all of its essential maintenance tasks?
5. How is yoga useful in reducing stress?
6. How are yoga postures beneficial for the body?
7. Name two musculoskeletal diseases.
8. Locate from the passage the opposite words for the following words :
(i) short-term
(ii) expanding.
