Human trials
Resistance training before or after breakfast
Impact of Overnight Fasted State Versus Fed State on Adaptations to Resistance Training: A Randomized Clinical Trial
Published
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Fasting Free source summary: https://fastingfree.com/education/vieira-2025-fasted-resistance-training/
PLAIN-LANGUAGE SUMMARY
What it found
Both groups improved muscle thickness and strength without clear between-group differences in those outcomes.
Keep these limits in view
Completer results, modest training frequency and self-reported diets. Some fasted participants reported dizziness, tiredness or nausea.
Understand the context
- Evidence type
- Randomized controlled trial
- Population or scope
- Adults aged 20–40 without regular resistance training
- Sample or coverage
- 37 recruited; 28 completed, including 22 women
- Study duration or data period
- 12 weeks
- Comparison
- Twice-weekly training after an overnight fast or a carbohydrate-rich meal, with comparable dietary guidance.
- Measured outcomes
- DXA, quadriceps ultrasound, maximal strength and muscle power.
Research terms in this source
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