Is HIIT More Effective For Fat Loss Or Building Lean Muscle?

By Russ Hollywood


Learning how to build muscle is often a game of chance and opinion, with what works for one guy often not quite working for another. However, there are a few benchmark pieces of advice which have been proven by modern science when it comes to building mass and losing fat, one of which is high intensity interval training.

For years, it was believed that performing high intensity cardiovascular activity was a sure-fire way to waste all of your efforts when it came to lifting weights. []

If you are trying to gain size you can get fooled into believing you only need to work hard on the weights, or that cardio work is dull and boring. However, recent studies show that muscle gains were massively increased thanks to the incorporation of HIIT into weekly resistance workouts in place of dull, regular cardiovascular activity.

You read that correctly - performing a HIIT workout has been proven by modern science to burn off more calories and promote more lean muscle growth than regular, steady state cardio. If you find the prospect of an hour on the bike to be pretty dull, then this discovery should really appeal to you.

It would be foolish to jump straight in, of course, without taking a few minutes to learn some of the basic principles which HIIT operates around. People often buy into opinions in the fitness world, rather than stone cold facts. They follow the advice of their friend purely because he's in shape, despite the fact that the advice offered little or zero scientific support. This is why so many people don't get results in the gym. For instance, most people do their cardio work after they hit the weights. Based on recent studies, not only should you be doing HIIT you should also be doing it before you hit the weights.

A Canadian study found that cardio exercise followed by weight training was vastly superior to doing it afterwards, both for fat loss and lean muscle retention. This study dates back to 2001, but was vastly under-reported and so it went under the radar of many trainers.

Of course, it is also important to discuss the increased difficulty which will be served up by a HIIT workout in comparison to regular, steady state endurance exercise. You won't be able to do this every day of the week, particularly if you are also doing resistance training. That's actually a good though, though, as it will allow your body to recuperate fully.

If you have been trying to learn how to build muscle in the gym but were perhaps unsure of high intensity interval training due to the fat loss stigma which is attached to it, you need not worry. HIIT has been proven to retain lean muscle mass in a far superior way to regular cardiovascular activity, allowing you to slot it into your program and get the best of both worlds.




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