Adding resistance training to aerobic exercise, such as bench step aerobics,
improves health and other fitness indicators.
|Since the late 80s
aerobics have become an extremely popular way of developing cardiovascular
fitness and helping lose bodyfat, thereby improving your body composition.
Most frequently, women participate in aerobic type exercises, but especially
in aerobics such as step and other aerobics dance classes. Sadly most women
leave it there when it comes to exercise. New evidence is arriving daily clearly
showing that resistance training must also make up at least part of your exercise
training. This study should hopefully shed some light as to why.
These top researchers looked at how 35 healthy, active women would go performing bench step aerobics (BSA) as well as adding resistance training exercises. Four equally matched groups were set up. One group did 25 minutes of BSA only called group A25. Another group did 25 min of BSA plus sets of upper and lower body resistance training called group AR. Then a third group performed 40 minutes of BSA only called group A40. A fourth "control group" was also set up that did nothing but daily tasks (C).
They studied these groups of women and individualized their training for
a period of 12 weeks. Of course before the training protocol began they were
subjected to many tests and also performed the same tests after the 12 week
exercise period, to establish changes due to exercise.
Muscular performance data showed that the AR group increased their squat and shoulder press weight by 26 and 11% respectively. Those performing aerobic only exercise, the A25 and A40, showed insignificant improvements by 9 and 16% respectively in the squat and only 5% in the shoulder press for both groups.
Only the AR group significantly improved their cycle time to exhaustion. Only the AR group showed a significant improvement of 30% in shoulder power. And only the AR group showed a significant improvement in peak vertical jump power.
In terms of body composition, no significant differences were observed in
any of the training groups. All exercise groups lost significant bodyfat.
Strong trends did show that those in the A40 and particularly those in the
AR groups actually increased fat free mass (or muscle) but they were not statistically
significant. Perhaps this will help ease the fears of some women exercisers
who believe that resistance training will get you looking big and muscular.
After 12 weeks of supervised resistance training these women gained only small
amounts of muscle mass. In fact the researchers would have loved more muscle
gain in these women since more muscle is associated with lower bodyfat levels
and enhanced prevention of gaining weight.
So in summary, adding resistance training to your aerobics exercise schedule can bring added benefits that are especially important to women. An aerobic exercise program alone seems to lack the ability to develop muscle strength and power which are critical to the healthy woman. Developing these will greatly aid in the prevention of falls, aging, improve bone health and enhance performance including daily tasks.
This study clearly demonstrates the importance of resistance training in an effective health fitness program. Adding resistance training allows you to have lower heart rates after training and helps lower your blood pressure and thus lowers your risk of heart disease. Adding resistance exercise to your training program also seems to allow your body to work at a lower "stress" level not only by lowering blood pressure, heart rate but perhaps most importantly, your perceived level of exertion will be much more tolerable and maybe even enjoyable.
The study not only shows health benefits associated with adding resistance training. It also shows that daily tasks will be much easier, especially when it comes to balance, stability and muscular strength. Clearly those in the resistance exercise group actually were much stronger, in both the lower and upper body and in almost all instances tested better after the 12 weeks, compared to aerobics training alone. Even though this study found that body composition did not change significantly amongst groups, I'm certain that if they studied these women over a longer period of time, these women would have a more functional life and a better chance of being lean, and more importantly staying lean long term.
Improves VO2 max; the oxygen use by the body
Decreases post workout heart rate for better recovery
Decreases blood pressure with a significant decrease in systolic blood pressure
Lowers your ratings of perceived exertion of each exercise
Increased the most weight in the squat and shoulder press, 26 and 11% respectively
Only the resistance training group significantly improved their cycle time to exhaustion
Only the resistance training group showed a significant improvement of 30% in shoulder power.
Only the resistance training group showed a significant improvement in peak vertical jump power.
Significantly increased the cross sectional area of leg muscles.
WILLIAM J. KRAEMER et al. Medicine and Science in Sports and Exercise 2001;33:259-269
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