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Home :: Muscle & Fitness
Does aerobic exercise really slow down muscle growth?
Almost everyone who invests time and effort in regular exercise wants
a leaner, healthier, more attractive body. This means one of two things
— more muscle or less fat. Usually, it's a combination of the two.
Of course, more muscle won't make a huge difference to the way you look
if it's hidden under a layer of fat. That's one of the reasons aerobic
exercise is so popular. After months — even years — of trying
to gain as much weight and muscle as they can, many people turn to aerobic
exercise in an attempt to shed the extra fat they've gained along the
way.
Muscle growth
Some are concerned, however, that aerobic exercise will strip away the
muscle they've worked so hard to build. One common belief is that anyone
trying to build muscle should avoid aerobic exercise on the basis that
it puts the brakes on muscle growth.
There are two main theories as to why aerobic exercise and weight training
don't mix. According to theory one, your muscles have a hard time adapting
to both resistance and aerobic exercise at the same time. The fact that
changes in both the type and size of muscle fibers after a combination
of weight training and aerobic exercise are different from those observed
after resistance exercise alone provides some support for this idea.
Theory two contends that residual fatigue from the aerobic component
of your program compromises your ability to "give your all"
when you train with weights. Muscle damage and glycogen depletion are
just two of the possible fatigue mechanisms with the potential to reduce
the "quality" of your workouts.
Before you step on the treadmill or take a seat on the exercise bike,
you need to know the full story about the effect of aerobic exercise on
muscle growth. Here's what the current evidence shows.
The first and most important finding is...
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