Scientists have recently become interested in the effects of aerobic exercise on cognitive function. It has been shown in rats that use of a running wheel every day stimulates new brain cells to grow in as few as 12 days. Brain cells in humans can't be studied directly, but what has been shown is that rates of dementia and Alzheimer's disease are lower in older individuals who exercise three or more times per week compared with older adults who exercise fewer than three times per week. In some cases, the risk is 62% lower. Evidence is also accumulating that active individuals perform better on cognitive function tests such as tests of memory and spatial relations than sedentary individuals.
If you're thinking that walking could be a good way of getting fit, losing weight or just keeping you healthy, then this book will tell you how to go about it. If you have already started walking and want to hone your power walking technique, or train for a specific goal (e.g. the London Moonwalk), then this book will tell you everything you need to know. But if you're more into hiking or country walks, then this is not for you.
Walking is a low-cost and effective form of exercise. However, the wrong type of shoe or walking action can cause foot or shin pain, blisters and injuries to soft tissue. Make sure your shoes are comfortable, with appropriate heel and arch supports. Take light, easy steps and make sure your heel touches down before your toes. Whenever possible, walk on grass rather than concrete to help absorb the impact.
If you're thinking that walking could be a good way of getting fit, losing weight or just keeping you healthy, then this book will tell you how to go about it. If you have already started walking and want to hone your power walking technique, or train for a specific goal (e.g. the London Moonwalk), then this book will tell you everything you need to know. But if you're more into hiking or country walks, then this is not for you.
There are many reasons why people start running: Busting stress, boosting energy, or snagging that treadmill next to a longtime gym crush are just a few. What's more, running can keep your heart healthy, improve your mood, stave off sickness, and aid in weight loss.Greater weight loss from running than walking during a 6.2-yr prospective follow-up. Williams PT. Medicine and Science in Sports and Exercise, 2013, Nov.;45(4):1530-0315. But depending on your personal goals, going full speed isn't the only route to good health.Walking versus running for hypertension, cholesterol, and diabetes mellitus risk reduction. Williams PT, Thompson PD. Arteriosclerosis, Thrombosis, and Vascular Biology, 2013, Apr.;33(5):1524-4636.
The research, presented at the European Society of Cardiology (ESC) Congress, followed 69 people between the ages of 30 and 60. Those who engaged in daily moderate exercise, such as a brisk walk or jog, high-intensity interval training (HIIT), and strength training experienced anti-aging benefits that could add an additional three to seven years to your life.1

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Breathing increases during aerobic exercise to bring oxygen into your body. Once inside your body the oxygen is (1) processed by the lungs, (2) transferred to the bloodstream where it is carried by red blood cells to the heart, and then (3) pumped by the heart to the exercising muscles via the circulatory system, where it is used by the muscle to produce energy.

The heart has four chambers that fill with blood and pump blood (two atria and two ventricles) and some very active coronary arteries. Because of all this action, the heart needs a fresh supply of oxygen, and as you just learned, the lungs provide it. Once the heart uses what it needs, it pumps the blood, the oxygen, and other nutrients out through the large left ventricle and through the circulatory system to all the organs, muscles, and tissues that need it.


Studies have shown that (1) microbial community composition may play an important role in xenobiotic processing in soil and other soil processes (Cavigelli and Robertson, 2000; Balser et al., 2002) and (2) the microbial communities residing at depth are not simply diluted analogs of the surface microbial communities, but exhibit considerable differentiation (Ghiorse and Wilson, 1988; Fritze et al., 2000; Blume et al., 2002). In fact, the microbial communities in the soil subsurface may function differently from those at different depths. Aerobic microbes predominated the surface soil or soil rich in moisture and oxygen, whereas anaerobic microbes predominated the deep soil (Li et al., 2014a; Fierera et al., 2003; Blume et al., 2002).
I suggest keeping records of your weekly progress by writing down what happens, or at least checking off that you followed through, and then setting your weekly plan every week for at least three months. Then at three months, you can evaluate your progress and see if any changes need to be made. How will you know if you're ready to stop setting weekly goals each week? Ask yourself if you believe you will be exercising regularly in six months. If the answer is "I'm not sure," or "no," then you ought to continue to set weekly goals. If you are confident that you can maintain the behavior and will be exercising in six months, then you may not need to set weekly goals, but at the first sign of slipping, you ought to go back to it.
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