Exercise acts as a temporary diversion to daily stresses and it improves self-esteem. Increased core temperature during exercise may lead to reduced muscle tension and favourable alterations in brain neurotransmitters. Mood improvements may also occur due to the increased secretion of endogenous (internal) opiates, e.g. endorphins. Psychological changes may occur because of changes in norepinephrine, dopamine and serotonin, all hormones which can affect mood and anxiety levels.
At least 35% of all cancer deaths may be related to overweight and lack of activity, the Seattle Cancer Research Centre has found. Exercise is believed to speed the passage of food through the colon, thereby reducing the amount of time that any toxins are in contact with the body. Overweight people also tend to have more insulin, which promotes the growth of tumours. For women, exercise reduces the level of oestrogen, a hormone linked to breast cancer.
Quick Q&A: Which is better at relieving anxiety — a warm bubble bath or a 20-minute jog? You might be surprised at the answer. The warm and fuzzy chemicals that are released during and after exercise can help people with anxiety disorders calm down. Hopping on the track or treadmill for some moderate-to-high intensity aerobic exercise (intervals, anyone?) can reduce anxiety sensitivity Effects of aerobic exercise on anxiety sensitivity. Broman-Fulks JJ, Berman ME, Rabian BA, Webster MJ. Department of Psychology, The University of Southern Mississippi, Hattiesburg, MS, USA. Behavior Research and Therapy. 2004 February;42(2):125-36. Exercise for the treatment of depression and anxiety. Carek PJ, Laibstain SE, Carek SM. Department of Family Medicine, Medical University of South Carolina, Charleston, SC, USA. The International Journal of Psychiatry in Medicine. 2011;41(1):15-28.. And we thought intervals were just a good way to burn calories!
If you want to lose weight and keep it off, you know that exercise should be an essential part of your routine. But the benefits of physical activity go far beyond just physical fitness. Increasingly, more and more research is showing that working out regularly can boost other aspects of your health as well, including cognitive function and emotional well-being.