If you've been thinking of starting up on the intermittent fasting approach, you've likely taken the time to do some research about what this approach is all about and whether it's going to be a good choice for you. That said, you've likely come across a few criticisms at some point or another and wondered just how valid these claims were.

Is intermittent fasting a good option to use or is it something that will take away from the total progress that you see?

Let's have a quick peak at what some of the criticisms are of this approach so that you can get the facts straight.

Criticism #1: You'll Lose Lean Muscle Mass

The very first criticism that you often hear with regards to intermittent fasting is that you'll start to lose lean muscle mass if you use this plan. This, however, is not correct. As long as you are getting sufficient protein for the day and are making sure not to overload on cardio training, you should have no problem maintaining your lean muscle mass.

The body is not going to move into a catabolic state when you go for 9 hours without food or longer. It would take days without food to start burning up lean muscle mass.

Criticism #2: Hunger Is Too Difficult To Manage

Another often stated criticism is that hunger is too hard to manage. While there will be a few people who find that their hunger dramatically increases on this plan, keep in mind that for most people, they'll actually find that hunger isn't an issue at all.

In fact, hunger is often lower on this approach than on the traditional 6-meals a day diet plan. Once your body adapts, you'll find that hunger is something you just don't experience. Certain hormones kick in during the fast that reduce hunger entirely.

Criticism #3: It'll Slow Down Your Metabolism

The third criticism that you may hear about intermittent fasting is that it will cause your metabolism to slow down. Again, this isn't correct. A very low calorie diet is what causes your metabolism to slow down.

As long as you are sure to be consuming the right amount of calories each day to maintain your body weight or offer a safe rate of fat loss, you aren't going to see your metabolic rate plummeting.

Contrary to what many people think, eating multiple times per day doesn't boost your metabolism any greater than eating three times per day. The amount of metabolic boost you get is directly related to how many calories you're consuming.

Criticism #4: It's Difficult To Get In Proper Nutrition

Finally, the last problem that some people state they run into with intermittent fasting is that they can't get in the right amount of good nutrition. Again, with proper planning, this is easily overcome.

While it can be a little more trying to eat a higher quantity of fruits and vegetables while on this diet as they tend to fill you up more, making it more difficult to eat them amongst all the other foods you have to get in, if you choose carefully, you can still do it.

Turn to higher calorie items such as dried fruits, bananas, avocadoes, carrots, and possibly even blended vegetables into a sauce if you're really struggling.

So there you have some of the top criticisms of this approach that you should know about. If you're smart in how you structure this diet, all of these are easily overcome

About the author: Shannon is a fitness trainer and freelance writer who has written for Bodybuilding.com.

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