MTA99 said:
So why eat protein if you're trying to gain lean muscle? Surely if I train I'm damaging the fibres in my muscles and these need repairing with amino acids? Given exactly the same diet, I do 500cals of low intensity cardio on one day, then 500cals of weights the next, wouldn't more of the protein be required for repair and growth than the day of cardio?
Yep thats exactly right. If you are training, your body does indeed need a higher amount of protein for repair. Remember though that all that training is burning calories. You need to eat enough calories to cover the energy expenditure of the exercising and then on top of that have enough extra calories to cause the body to need to "store" some. And lastly, a high enough proportion of you calorofic intake needs to be protein so that the body can repair your damaged muscles and go on to induce a hypertrophic state.
MTA99 said:
All this aside, the point I'm making is that if the "guy" in the original post has 1 shake a day "that body builders use" (an extra ~30gms and ~125cals to his "normal" diet), he won't get fat nor will he turn into Ronnie Coleman!
And you're absolutely correct there mate.
Let me rephrase what a said earlier to avoid confusion though.
Person A:
Eats 2500 calories per day
Burns 2500 calories per day
Drinks 500 calories worth of protein shakes per day
Result = He gains weight.
Not because of the protein specifically, but simply because overall he is consuming more calories (3000) than his body is using (2500). Whether it is the protein or the real food that puts him over that limit, does not matter.
If that same guy was weight training then yes his body would require more protein in order to rebuild and repair his damaged muscles. Therefore some of those extra 500 calories would be used up in that process. But if that was the case then he would actually be burning more than 2500 calories per day.
Like this:
Person A:
- Eats 2500 calories of whole food per day
- Burns 2500 calories from sitting on his backside all day
- Drinks 500 calories worth of protein shakes per day
- Works out and burns 200 further calories, 300 more calories are used to repair his damaged muscles
The result, He neither loses nore gains weight.
In this scenario the formula is slightly different. Person A is consuming a total of 3000 calories, and his body is also burning 3000 calories, be it through exercise or through the bodies need for repair. If the guy had eaten say an extra 300 calories on top of this then he would gain weight. Since he had worked out and consumed enough protein so support hypertrophy he would like gain a higher ratio of muscle than fat. As the calorific excess increases so will the weight gain.
The bottom line is, Proteins are energy, carbs are energy, fats are energy. If we intake more energy than we expend we gain weight. Simple as that.