How breakfast protein helps muscles grow when women lift weights
Relationship between protein intake and resistance training-induced muscle hypertrophy in middle-aged women: A pilot study.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Middle-aged women in Japan did weight training twice a week for 16 weeks. Scientists checked how much muscle they gained and how much protein they ate, especially at breakfast.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
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Max 30Expert Opinion & Narrative Reviews
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Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Middle-aged women in Japan did weight training twice a week for 16 weeks. Scientists checked how much muscle they gained and how much protein they ate, especially at breakfast.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 539 / 72
Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Publication
Authors
Yasuda J, Murata K, Hasegawa T, Yamamura M, Maeo S, Takegaki J, Tottori N, Yokokawa T, Mori R, Arimitsu T, Nishikori S, Fujita S
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Claims (5)
Most of the reason why people gain muscle at different rates isn't because of their genes—it's because of things they can change, like how hard they train, how much they eat, and how focused they are in the gym.
When doing strength training, consuming more protein leads to greater muscle growth than consuming the same amount of calories from carbohydrates or fats.
Working out with weights twice a week for four months can help middle-aged Japanese women build a little more muscle, even as they get older.
If middle-aged Japanese women eat more protein at breakfast over time while strength training, they may gain more muscle — but if they already eat a lot of protein at breakfast to start with, they might not gain as much.
If middle-aged Japanese women who are doing strength training start eating more protein at breakfast—especially if they weren’t eating much before—they’re likely to gain more muscle.