The Claim

A 4-week supervised Pilates program performed five times per week for 50 minutes per session does not significantly increase rectus abdominis muscle thickness in primiparous women 2–12 months postpartum.

Source: Effects of Pilates on inter-recti distance, thickness of rectus abdominis, waist circumference and abdominal muscle endurance in primiparous women

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
47score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Description
1 study reviewed
In plain English

After doing supervised Pilates five times a week for 50 minutes each session over four weeks, women who recently gave birth do not show a measurable increase in the thickness of their rectus abdominis muscles.

See the scientific wording

A 4-week supervised Pilates program performed five times per week for 50 minutes per session does not significantly increase rectus abdominis muscle thickness in primiparous women 2–12 months postpartum, suggesting that short-term core exercise may improve muscle function without altering muscle size in this population.

What the research says

1 study

  1. Study: Effects of Pilates on inter-recti distance, thickness of rectus abdominis, waist circumference and abdominal muscle endurance in primiparous women

    The study found that doing Pilates for 4 weeks made women’s cores stronger and tighter around the waist, but didn’t make the main stomach muscle thicker. So, you can get stronger without your muscles getting bigger.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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