A 4-week caloric restriction with high volume resistance-training and high-protein diet does not increase fat-free mass sparing but increases strength
Study Details
This new 4-week study compared high- versus low-volume resistance training during a ~40% calorie deficit with 2.3 g/kg/day protein in 16 resistance-trained adults 🔍
Participants trained 5 days/week and completed either 30 or 12 sets per major muscle group per week 🏋️
Key Findings
⚖️ Body mass fell by ~4.2 kg across the intervention
🔥 Fat mass decreased by ~3.7 kg, accounting for most of the weight lost
💪 Fat-free mass was maintained in both groups despite the aggressive calorie deficit
↔️ Performing 30 sets/muscle/week did not preserve more fat-free mass than 12 sets/muscle/week
🥩 A high protein intake of 2.3 g/kg/day combined with resistance training therefore appeared sufficient to maintain FFM over the 4 weeks in this sample
📈 Higher-volume training did, however, produce greater improvements in strength
🏋️ Chest press 5RM increased ~18% with high volume versus ~7% with low volume
🦵 Right-leg press increased ~27% versus ~10%, while left-leg press increased ~25% versus ~14%
💪 Machine-row strength improved in both groups, without a clear between-group difference
🧠 The authors suggest greater practice and neuromuscular exposure to the exercises may partly explain the extra strength gains rather than greater muscle growth
🔥 Resting energy expenditure fell by ~151 kcal/day, or ~8%, despite preservation of fat-free mass
📉 Nitrogen balance remained negative throughout the intervention and did not differ between training-volume groups
Conclusion
For maintaining muscle during short-term aggressive weight loss, ~12 sets/muscle/week may be enough when protein intake is high ✅
However, higher volumes may still be useful when increasing or preserving strength is an important goal during a cut 📈
Reference
https://www.nature.com/articles/s41430-026-01757-8
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