The 'New' Cardio
Joe Weider
Muscle and Fitness, january 2003
If you thought running or other aerobic activities were the only way to a healthy heart, take note: Research is provingthat resistance training is effective in reducing blood pressure, controlling coronary risk factors, and is a great help in preventing and managing diseases such as diabetes and osteoporosis. And that's on top of improving one's strength, endurance, and psychological well-being.
In other words, weight training boasts many of the same benefits often associated directly with cardio workouts! A regimen that incudes both is definitely a powerful one-two combo to maintainyour body and your health, but many people focus too much of their limited energies on cardio, which is a mistake in my estimation.
you see, for years, weight traininghas suffered from misinformation, or at least a lack of information, among some exercisers. Specifically, people training more to protect their health than build their body think cardio is the best option for that goal- so they lace up their running shoes, jump on the bike, or crankout 40 minutes on the elliptical machine and may never even touch a weight during their workouts. After al, cardiovascular training is all about the heart, while weight training is all about building big muscles, right?
Well, wrong, actually, as I've been arguing for years. And now science is catching up. Indeed, rsistance training offers it all in terms of benefits. And while cardio is a sound component of a total health and fitness program, it's certainly not the most efficient road to benefits if you do cardio as your main mode of exercise and weight-train only as an afterthought.
A recent study from the University of Wisconsin-LaCrosse, reported in the European Journal of Applied Physiology, offers even more compelling evidence. Researchers found that after a 30-minute full-body workout, where subjects trained with their 10-rep max weights, resting metabolic rate was elevated by %20 for two days following the exercise session. In a 180-pound man, that averages to an extra 400 calories per day! Additionally, the percentage of fat that was burned by the subjects also increased.The researchers concluded that the energy required to recover from resistance exercise was significant enough to be helpful in a weight-loss program.
Following aerobic exercise, a person's resting metabolic rate remains elevated for anywhere from 60 minutes to about 12 hours, depending on the intensity and duration of the exercixe session. Although a typical weightlifting workout may burn only about 60% of the calories burned during a moderate bout of cardio of the same duration (for instance, a 180-pound manwould burn 210 caloriesi n 30 minutes of weight training vs. 360 calories if he jogged at 6 mph for the same period), that gap closes over the longer term. The payoff for weight training comes during the following rest days, when that 180-pound man would burn an additional 800 calories simply from an elevated metabolism.
Another thing to consider: Cardio activity may burn calories, and it does condition the heart, but one thing cardio activity does not do is promote significant skeletal muscle growth. And muscle is a metabolic machine - a pound of muscle burns about 35-50 calories per day on average. Sure, it's not much by itself, but it adds up. Add 5 pounds of muscle, and your body will burn about 250 more calories each and every day. Suddenly, calories that were going to your midsection will be used as muscle fuel, keeping you leaner over the long haul,
In a succesful fitness program, you need both weight training and cardio - just keep in mindwhich form of exercise gives you the most bang for your buck!