A deficit reduced lean mass gains, with similar strength gains

Key finding

A deficit reduced lean mass gains, with similar strength gains

Context

Meta-analysis and meta-regression of randomised trials with resistance training in an energy deficit for at least 3 weeks.

In a deficit lean mass grew less, strength rose similarly
  • −0.57: Lean mass — effect size, significantly smaller gain (p = 0.02)
  • −0.31: Strength — effect size, no significant difference (p = 0.28)
  • ~500 kcal: Threshold — daily deficit that prevented lean mass gains in the meta-regression model

Limits

The threshold of about 500 kcal comes from a meta-regression across different studies and is an average. For individuals it may differ.

Sources

  • Energy deficiency impairs resistance training gains in lean mass but not strength: A meta-analysis and meta-regression. · Murphy · 2022 · Scandinavian Journal of Medicine & Science in Sports PubMed DOI Study note

Guides

Summaries by SetCtl, not medical advice.