The technical definition of aerobic exercise is “any form of exercise or activity that uses the aerobic metabolism — meaning oxygen is heavily involved in the cellular reactions that provide the body with the energy necessary to perform activity,” explains Michael Jonesco, DO, an assistant professor of internal and sports medicine at the Ohio State University Wexner Medical Center in Columbus. “You’re making yourself more efficient at delivering oxygen to the rest of the body.”

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A single activity can include elements of both aerobic and anaerobic exercise. For example, interval training, where you alternate cycles of low-intensity (aerobic) and high-intensity (anaerobic) work during the same workout, has elements of both. So does a game of tennis where you might sprint at one moment (anaerobic) and then move less aggressively for several minutes (aerobic) as you hit ground strokes from the baseline.
Facultative and Microaerophile aerobes: Facultative bacteria behave both aerobically and anaerobically, according to the prevailing conditions. In reduced environments, they acquire energy via anaerobic pathways, whereas in oxidative environments, they develop aerobic pathways. The microaerophilic bacteria require oxygen but in very low concentrations.
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Chronic pain has been called a silent epidemic, with an estimated 100 million Americans currently living with it. And if you’re one of those people battling daily pain the last thing you probably want to do is get up and go for a walk. But researchers found that moderate walking improved chronic pain in people, both in the short term and the long run, even if the underlying condition remained uncured. The pain relief benefits of walking may not be able to cure chronic pain, but it can help you deal with it better. Learn the creative way to keep walking when the weather is cold.
Dancing, swimming, water aerobics, biking, walking, hiking, climbing steps (two at a time for a more vigorous workout), low-impact dance classes, kick-boxing, all the cardio machines at the gum (treadmill, elliptical, bike, rower, x-c skiing, stair-climber), and many other activities are all examples of types of aerobic or cardio activities, but they can be anaerobic too if they are performed at a high enough intensity. Try riding your bike alongside Lance Armstrong in the French Alps and you'll know what anaerobic exercise means in moments. But then again, riding along on your bike at a leisurely 8-10 mph on the boardwalk at the seashore is the same activity, but at a much lower intensity, much lower heart rate, and much lower oxygen consumption, and so in this case, biking is aerobic. The bottom line is that the intensity at which you perform an activity determines if it's aerobic or anaerobic.
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“Some people walk like this.” Joanna Hall, sports scientist, one-time TV fitness guru and now walking expert springs off to demonstrate a walk. She looks purposeful, compact and speedy, like a person on her way to give someone a piece of her mind. It is a fine walk. But I can tell from her manner that it does not meet the criteria of WalkActive, a walking programme Hall devised from scratch eight years ago. “And some people walk like this,” Hall continues. She embarks on a diffident shuffle, with arms swinging aimlessly from side to side.
No more tedious calculations after returning from the gym - this walking calorie calculator will calculate the calories burned walking or running on a treadmill. All that it needs are some basic information about your walking or running exercise, such as the distance and average speed, and it will provide you with the most accurate measure of how many calories does walking burn.
Imagine that you're exercising. You're working up a sweat, you're breathing hard, your heart is thumping, blood is coursing through your vessels to deliver oxygen to the muscles to keep you moving, and you sustain the activity for more than just a few minutes. That's aerobic exercise (also known as "cardio" in gym lingo), which is any activity that you can sustain for more than just a few minutes while your heart, lungs, and muscles work overtime. In this article, I'll discuss the mechanisms of aerobic exercise: oxygen transport and consumption, the role of the heart and the muscles, the proven benefits of aerobic exercise, how much you need to do to reap the benefits, and more.
Aerobic exercise (also known as cardio) is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process.[1] "Aerobic" means "relating to, involving, or requiring free oxygen",[2] and refers to the use of oxygen to adequately meet energy demands during exercise via aerobic metabolism.[3] Generally, light-to-moderate intensity activities that are sufficiently supported by aerobic metabolism can be performed for extended periods of time.[1] What is generally called aerobic exercise might be better termed "solely aerobic", because it is designed to be low-intensity enough so that all carbohydrates are aerobically turned into energy.
An analysis of studies on walking showed it improves aerobic fitness - which is technically the ability of the heart to get oxygen to our muscles and how effectively our muscles use that oxygen. But to be effective, walking needs to be of at least moderate intensity, which means an intensity where you’re able to notice your breathing but can carry on a conversation without noticeable pauses between words. For many, this is a brisk walk.
“You can just take this as blanket permission to touch me whenever you like,” I consider saying. It sounds a bit rude. I toy with some other formulations – “sure, mi casa es su casa” – and in the throes of that mental effort, my walk disintegrates entirely. Not only can I not do the new walk, I’ve forgotten how to do my old walk. When you first start to follow this technique, Hall’s advice is to do three 10-minute walks every day; any longer than that, and you won’t be able to concentrate.
The second recommendation is from the American College of Sports Medicine. The ACSM recommends 20-60 minutes of continuous aerobic activity (biking, walking, jogging, dancing, swimming, etc.) three to five times a week, at 60%-90% of maximum heart rate, and two to three days of resistance training. This is a more formal, "workout" recommendation, although you can also accumulate the more intense workout in bouts of 10-15 minutes throughout the day if you like. Follow this recommendation and your fitness and your health will improve.
Walking programs have generally been studied for effectiveness. The Ottawa Panel recently concluded that aerobic walking combined with stretching and strengthening exercises, education, or behavioral programs is recommended to improve pain relief, functional status, and the quality of life of adult individuals with OA.32 Cycling is another form of aerobic exercise that can be beneficial. Low-intensity cycling was shown to be as effective as high-intensity cycling in improving function and gait, decreasing pain, and increasing aerobic capacity in subjects with knee OA.36 Cycling should be considered for those with arthritis who may have difficulty with a walking program because of joint pain.

The statistics are impressive: The American Diabetes Association says walking lowers your blood sugar levels and your overall risk for diabetes. Researchers at the University of Boulder Colorado and the University of Tennessee found that regular walking lowered blood pressure by as much as 11 points and may reduce the risk of stroke by 20% to 40%. One of the most cited studies on walking and health, published in the New England Journal of Medicine in 2002, found that those who walked enough to meet physical activity guidelines (30 or more minutes of moderate activity on 5 or more days per week) had a 30% lower risk of cardiovascular disease, compared with those who did not walk regularly. "The physical benefits of walking are well documented," says Scott Danberg, director of fitness at Pritikin Longevity Center + Spa in Miami. With impressive results like these, there's a good chance you'll get a pat on the back from your doc at your next checkup.

Physical therapist, Col. Pauline Potts and Dr. Kenneth Cooper, both of the United States Air Force, advocated the concept of aerobic exercise. In the 1960s, Cooper started research into preventive medicine. He conducted the first extensive research on aerobic exercise on over 5,000 U.S. Air Force personnel[13][14] after becoming intrigued by the belief that exercise can preserve one's health. Cooper published his ideas in a 1968 book titled, "Aerobics". In 1970, he created his own institute (the Cooper Institute) for non-profit research and education devoted to preventive medicine and published a mass-market version of his book "The New Aerobics" in 1979. Cooper encouraged millions into becoming active and is now known as the "father of aerobics".[15][16] Aerobics developed as an exercise form in the 1970s and became popular worldwide in the 1980s after the release of Jane Fonda's exercise videos in 1982.[17][18]

“This has all been scientifically proven,” says Hall. “Dr Darren James, research fellow at South Bank University, has done a study showing all this. WalkActive significantly and statistically improves your posture, increases your walking speed by up to 24%, reduces joint impact, joint stress at the knee and at the ankle and improves your body shape.” It is, unmistakably, a fitness programme, as in, you would undertake it for the same reasons as an aerobics class, to lose weight, or at the very least, redistribute it in a more sightly way. I did several 10-minute walks, and while never out of breath, was certainly more tired at the end than I would normally have been.
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.
The thinking has also changed somewhat on whether there’s a threshold minimum workout duration required to reap cardiovascular health benefits from aerobic activity. HHS’s new physical activity guidelines eliminated the long-standing recommendation that exercise had to last at least 10 minutes to count toward your daily total. (4) The new guidelines emphasize that small bouts of activity throughout the day can add up to big health benefits.

But aside from weight loss, walking has definite pros.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. Researchers looked at data from the National Runners’ Health Study and the National Walkers’ Health Study and found that people who expended the same amount of calories saw many of the same health benefits. Regardless of whether they were walking or running, individuals saw a reduced risk of hypertension, high cholesterol, diabetes, and improved better cardiovascular health.
Another plan I like is the five-minute out, five-minute back plan. Just like it sounds, you walk for five minutes from your starting point, turn around, and walk back. It's simple and doable for almost everyone. It's a change in your activity behavior even though it's not all that much, and you can increase as you get more used to it. From five minutes you could go to seven and a half out, seven and a half back, a total of 15 minutes just like that. And you can keep your eye on 15 out, 15 back, and there you go meeting the Surgeon General's recommendation of 30 minutes. If you're feeling ambitious, you can add some abdominal crunches and push-ups once you get back. For push-ups, if you can't do a standard one on the floor, modify them by leaning against a wall, leaning against a table, or on your knees on the floor. The lower you go the harder they are. Start with two to three sets of crunches and push-ups, 12-15 repetitions, three to four days a week. As they get easier, you can increase the intensity of crunches by going slower or putting your legs in the air with your knees bent. As push-ups get easier, you can go to the next lower level (for example, from wall to table to on your knees on the floor).

As you get started toward the recommended 30 minutes of moderately intense aerobic exercise five days per week, aim to exercise at a level that just lets you keep up a conversation during the activity. If you can get out three or four sentences in a row without gasping for air, it’s a sign that you’re maintaining an intensity that is truly aerobic, meaning aerobic metabolism is supplying the vast majority of your body’s energy, Jonesco says.