The Summary
Researchers from the University of Ottawa investigated how training volume affects muscle preservation and strength during weight loss. They put 16 resistance-trained individuals on a 4-week, 40% caloric restriction paired with a high-protein diet. Participants were split into low-volume (12 sets per muscle group weekly) and high-volume (30 sets weekly) resistance training groups. Both groups lost similar amounts of body weight and fat, with no significant differences in muscle preservation. However, the high-volume group achieved significantly greater strength gains in the chest press and leg press.
Why this is interesting
Gym lore suggests that to maintain muscle while dieting, you must dramatically increase training volume. This study challenges that assumption, showing that extra sets do not offer extra muscle-sparing benefits when protein intake is high. Surprisingly, even in a deep caloric deficit, high-volume training still successfully drives neural adaptations to make you stronger. For the reader, this means you do not need to exhaust yourself with endless sets to keep your muscle while dieting, though pushing the volume can still give your strength a major boost.