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The Study

It's never too late: The impact of resistance training on strength and body composition in females across the lifespan - A systematic review and meta-analysis.

In simple terms

This study looked at lots of other studies about women lifting weights and found that, on average, women who lifted weights tended to get stronger and lose fat. But we don’t know if those original studies were fair tests — maybe the women who lifted weights were already healthier. So we can’t say lifting weights caused the changes — just that they went together.

45%

Analysis score

45/ 100

Maximum 100 for a systematic review with meta-analysis.

Where the score came from

Reporting0
Methodology0
Publication100
Statistical100
Study type (basis of the score)
Systematic Review with Meta-Analysis
Level 2a - Systematic review of cohort studies
What’s the bottom line?

This study looked at many other studies about women who lifted weights and found that it made them stronger and changed their body shape for the better.

Where does this study sit?

Systematic Reviews & Meta-analyses

Max 100

Randomized Trials

Max 90

Cohort Studies

Max 72

Case-Control

Max 58

Cross-Sectional

Max 44

Case Reports & Series

Max 30

Expert Opinion

Max 5
StrongerWeaker
Cohort Studies
Level 2
45

45 / 100

Quality 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.

Can establish causation

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Key takeaways

Summary

Based on the study abstract and findings.

  1. 1Yes — these changes mean women can become noticeably stronger and leaner even if they start later in life, and they don’t need to follow strict age- or gender-specific routines to see benefits.
  2. 2Women got 1.5 times stronger on average, gained a little more muscle (0.27), and lost a little fat (-0.30), whether they were before or after menopause.
  3. 3None of these results changed based on how often, how long, or how many sessions they trained.

Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data

Publication

Journal

Journal of science and medicine in sport

Year

2026

Authors

E. Isenmann, Stephan Geisler, Tim Havers, F. Siegert, Felix Hemke, Steffen Held

Analysis v4
DOI:10.1016/j.jsams.2026.03.002
PubMed:41963141
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