Can lifting weights and drinking protein shake help you keep muscle while dieting?
Independent and Combined Effects of Resistance Training and Whey Protein on Skeletal Muscle Mass and Function in Individuals with MASLD Under Caloric Restriction
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Whey protein did not enhance strength or endurance gains beyond resistance training alone — even at 1.5g/kg/day.
Decades of fitness marketing and research in non-restricted states show whey + lifting = better gains. This study shows that synergy disappears under severe calorie restriction, which contradicts nearly all mainstream fitness advice.
Practical Takeaways
If you're dieting to lose fat, lift weights 5x/week and eat 0.8g of protein per kg of body weight daily — skip the extra shakes.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Whey protein did not enhance strength or endurance gains beyond resistance training alone — even at 1.5g/kg/day.
Decades of fitness marketing and research in non-restricted states show whey + lifting = better gains. This study shows that synergy disappears under severe calorie restriction, which contradicts nearly all mainstream fitness advice.
Practical Takeaways
If you're dieting to lose fat, lift weights 5x/week and eat 0.8g of protein per kg of body weight daily — skip the extra shakes.
Publication
Journal
Nutrients
Year
2025
Authors
Chae-Been Kim, J. Sung, Dohyun Ahn, Eun-Ah Jo, Kyung-Wan Baek, Hae-Ri Heo, J. Oh, Fengrui Zhang, Hyoung-su Park, H. Kim, Jung-Jun Park
Related Content
Claims (6)
Adding protein shakes to strength training doesn’t make people with fatty liver disease any stronger or more enduring than just doing the workouts alone — even when they’re eating less food.
People with fatty liver disease on a low-calorie diet don’t lose muscle if they eat at least 0.8 grams of protein per kilogram of body weight each day — eating more protein doesn’t help any more.
When people with fatty liver disease do strength training for a month while eating less, they get stronger not because their muscles grow bigger, but because their brain and nerves learn to use the muscles better.
When people with fatty liver disease eat a lot of protein and lift weights at the same time while eating very little, they don’t get any extra muscle benefits — the two things don’t work together like they usually do.
In individuals with elevated body fat stores, resistance training during a caloric deficit can sustain muscle hypertrophy while promoting net fat loss.