Wednesday, April 17, 2013

Why Performing Cardio Before Weights Is Better For Building Lean Muscle

By Howe Russ


When you are trying to build lean muscle in the gym, should you do cardio before or after weights for maximum results? This is a question often asked and rarely answered with anything more than personal opinion. If you are trying to figure out how to lose weight or build muscle, you're about to discover the facts on this topic.

There are numerous areas in the fitness industry which, until recently, were shrouded in mystery. This is one of them. Despite the fact everybody knows someone who has some fitness knowledge, until very recently the answer to this question was based entirely on personal opinion because there weren't sufficient studies to give a definitive answer.

Recent studies showed beyond any doubt that performing a cardiovascular workout before resistance training was far more effective than doing it the other way around. Today we'll be delving into two of the most well documented studies in this area, showing you why they reached their controversial conclusions. []

While both approaches ultimately yield positive results, a study at the James Maddison University discovered that an aerobic-weights routine yielded far more lean muscle growth than a weights-aerobic routine.

Furthermore, the Journal of Strength and Conditioning recently carried out a study on this topic to discover the fat loss benefits, too. Their findings were similar. Those who performed aerobic exercise before hitting the iron were able to increase fat loss results considerably over the group of case studies doing it the opposite way around.

Those facts may be controversial to many fitness enthusiasts, who opt to perform their resistance training first. The theory behind that method is that they don't want their muscles to be tired by aerobic exercise when they begin pushing out repetitions. This makes sense and it's an approach which does yield results. However, science suggests that switching them around is far superior for both fat loss and lean muscle development.

Two enzymes released during exercise will play an important factor here:

* AMPK

* mTOR (aka mammalian target of rapamycin)

You may have heard these two enzymes discussed in fitness magazines and bodybuilding gyms in the past. If you are performing aerobic activity the body increases the release of the AMPK enzyme to help your muscles adjust to endurance activity, while signals the beginning of the muscle recovery process at the end of a workout. For about an hour after you hit the weights, you'll have a surge of mTOR in your body and this is perfect for consuming post-workout nutrition. After six hours, the spike in mTOR wears off and your body returns to normal. []

If you finish your weight training and then sit on a bike for 45 minutes you have not only wasted the bulk of your golden nutrition window, you have also made a fatal mistake. When the body releases AMPK, i.e. during cardiovascular exercise, this hormone doesn't co-exist with mTOR and actually kills it off.

So, should you do cardio before or after weights? Whether you want to learn how to lose weight or how to pack on lean muscle, recent science is heavily on the side of performing your aerobic activity before you pick up a dumbbell.




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