Exercise Benefits part2

Exercise Health Benefit 7: A hedge against colon cancer
Colon cancer is one of the leading causes of cancer death in men. Approximately 80% of cases of this disease could be prevented. A healthier diet (with more fiber and whole grains) is part of the prescription. But exercise turns out to be just as important as diet. Studies have shown that physical activity may reduce colon cancer risk by as much as 30 to 40%.
Exercise Health Benefit 8: Strong bones
Another unwelcome effect of aging is thinning bones, which can lead to a greater risk of fractures. In a study that followed 3,262 men from their 40s to their 60s, strenuous physical activity dramatically lowered the risk of hip fractures.
Exercise Health Benefit 9: Weight loss
A lifetime of regular physical activity — even activities as simple as walking half an hour most days — can help keep that belly from bulging over your belt. 3500 calories in one pound.
Exercise Health Benefit 10: A longer life
Add it all up and an active life also means a longer and healthier life. In a 2004 study researchers followed 15,853 men aged 30 to 59. Over a 20 year period, men who engaged in physically active leisure activities — jogging, skiing, swimming, playing ball, or doing serious gardening — were up to 21% less likely to develop cardiovascular disease or to die of any cause during the study period.
How much exercise do you need to reap these health benefits?
The answer to how much exercise you need depends partly on what you’re after. Burning about 1,000 extra calories a week in activities is likely to extend your life. Walking half an hour most days of the week is all you need to significantly lower your risk of colon cancer and diabetes. But the more physical activities you can weave into your daily life, the healthier you’ll be. Most studies of physical activity show a strong dose-response rate, the more you do, the more you benefit.