December 2011
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The Importance of Physical "Variability" in Cardio Exercise
Your Cardio Workouts may NOT be helping you unless you incorporate a high range of heart rate shifts in your training By Mike Geary – Certified Personal Trainer, Certified Nutrition Specialist Author of best-seller: The Truth about Six Pack Abs Are you a cardio junkie? Everyone seems to think that "cardio" is the best way to get in shape and lose body fat. I'm going to show you with this article why I disagree! It is quite common to hear fitness pros, doctors, and other health professionals prescribe low to moderate intensity aerobic training (cardio) to people who are trying to prevent heart disease or lose weight. Most often, the recommendations go something like this: "Perform 30-60 minutes of steady pace cardio 3-5 times/week maintaining your heart rate at a moderate level" Before you just give in to this popular belief and become the “hamster on the wheel” doing endless hours of boring cardio exercise, I’d like you to consider some recent scientific research that indicates that steady pace endurance cardio work may not be all it’s cracked up to be. First, realize that our bodies are designed to perform physical activity in bursts of exertion followed by recovery, or stop-and-go movement instead of steady state movement. Recent research is suggesting that "physical variability" is one of THE most important aspects to consider in your training. This tendency can be seen throughout nature as most animals tend to demonstrate "stop-and-go" motion instead of steady state motion. In fact, humans are the only creatures in nature that attempt to do “endurance” type physical activities such as running long distances at the exact same speed the whole time. Most competitive sports (with the exception of endurance running or cycling) are also based on stop-and-go movement or short bursts of exertion followed by recovery. To examine an example of the different effects of endurance or steady state training versus stop-and-go training, consider the physiques of marathoners versus sprinters. Most sprinters carry a physique that is very lean, muscular, and powerful looking, while the typical dedicated marathoner is more often emaciated and sickly looking. Now which would you rather resemble? Another factor to keep in mind regarding the benefits of physical variability is the internal effect of various forms of exercise on our body. Scientists have known that excessive steady state endurance exercise (different for everyone, but sometimes defined as greater than 60 minutes per session most days of the week) increases free radical production in the body, can degenerate joints, reduces immune function, causes muscle wasting, and can cause a pro-inflammatory response in the body that can potentially lead to chronic diseases. Sports Workouts and Sprinting In addition, weight training naturally incorporates short bursts of exertion followed by recovery periods. High intensity interval training (varying between high and low intensity intervals on any piece of cardio equipment) is yet another training method that utilizes exertion and recovery periods. For example, an interval training session on the treadmill could look something like this: Warm-up for 3-4 minutes at a fast walk or light jog Interval 1 - run at 8.0 mi/hr for 1 minute Interval 2 - walk at 4.0 mi/hr for 1.5 minutes Interval 3 - run at 10.0 mi/hr for 1 minute Interval 4 - walk at 4.0 mi/hr for 1.5 minutes Repeat those 4 intervals 4 times for a very intense 20-minute workout. Also, don't overlook other great ways to incorporate variable intensity cardio training by using a jump rope, a rowing machine, stairs running, or even outdoor hill sprints. The take-away message from this article is to try to train your body at highly variable intensity rates for the majority of your workouts to get the most beneficial response in terms of heart health, fat loss, and muscle maintenance. ABOUT Driven by a philosophy to promote a community and lifestyle of staying in shape and living healthy in Orange County, California.The OC Muscle Academy promotes products that helps individuals achieve extraordinary results. Certain brands are exclusively available through the OC Muscle Academy. www.growmusclesnow.com -Jason Ferruggia's |



