Muscle growth response to protein after a full body workout between larger and smaller participants shows not much difference.
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Men With More Muscle May Not Need More Protein"
‘Muscles were able to grow and recover from exercise better after a higher dose of protein irrespective of the body mass of the person.’
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Kevin Tipton, Professor of Sport, Health and Exercise Science in the Faculty of Health Sciences and Sport, said: "There is a widely-held assumption that larger athletes need more protein, with nutrition recommendations often given in direct relation to body mass. 
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"In our study, participants completed a bout of whole-body resistance exercise, where earlier studies -- on which protein recommendations are based -- examined the response to leg-only exercise. This difference suggests the amount of muscle worked in a single session has a bigger impact on the amount of protein needed afterwards, than the amount of muscle in the body."
Experts also found participants' muscles were able to grow and recover from exercise better after a higher dose of protein.
Consuming 40 grams of protein after exercise was more effective at stimulating muscle growth than 20 grams. This increase occurred irrespective of the size of the participants.
Professor Tipton continued: "Until now the consensus among leading sports nutritionists, including the American College of Sports Medicine and the British Nutrition Foundation, is that weightlifters do not need more than around 25 grams of protein after exercise to maximally stimulate the muscle's ability to grow.
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Young, resistance-trained males were recruited for the study and divided into two groups, one with lower lean body mass of less than 65 kilograms and one with higher lean body mass of more than 70 kilograms.
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Source-Eurekalert