OK, here's the thing. Your teacher is pretty much right in one respect. I think what he meant to say is that if you intake too much protein AT ONE TIME, it will be a waste since the body can only "absorb" around 30-50 g of protein at one shot (55 kg MAX for very few people based on body build and size). So, after your exercise, the most your body will "keep" is probably about 50 g. You are right that after exercise is a good time to consume protein - your muscles are short on amino acids and other nutrients due to the intense physical activity.
Basically, it is a waste to consume vast amounts of protein in one shot - in that case you will piss it all out. However, if you have a high daily protein intake, and you spread out your periods of protein consumption (instead of taking 100g at one sitting, take approx 33 g across 6-7 hrs), then the efficiency will increase regarding how much protein your body utilizes. Your teacher is right that protein is not stored - as a protein. If too much protein (protein is 4 kcal per gram - same as a carb) is taken in, the amino acids and functional groups that make it a protein in the first place will be excreted, while a lot of the energy storing parts of the macromolecule will be stored as adipose tissue (fat). So all the energy will be stored, but it just will be stored as fat rather than muscle. It's like eating chicken all day (lean white meat chicken breast) - if you continuously eat it your muscles wont become larger and you will just become fat.
Protein is basically used in muscle building since sarcomeres, the functional unit of muscle fibers, are very large and therefore require a lot of building blocks and what not, and one of protein's physiological functions is to serve as the "building blocks" of cellular components. That's why, when you exercise, you heavily exert your muscles and in response, your muscles try to adapt by becoming larger - and to become larger they need protein "building blocks".
Edit - I have something to add. Your teacher said that eating normal protein will be sufficient. This depends - if you go to the gym and work out, but stick with a "normal" protein intake, your gains will most likely be less than if you increased your protein diet. Like I said, protein serves as the building blocks for cellular structures, and some of the biggest cellular structures are sarcomeres of the muscles. So, while your teacher is wrong about eating more protein not helping for muscles, it DOES depend on whether or not you eat it in one shot (the body can only "process" so much protein at one time").
Log in to comment