This tool gives general, evidence-based feedback on training structure. It is not medical advice. If you have injuries or health conditions, talk to a qualified professional.
Sources
- Schoenfeld BJ, Ogborn D, Krieger JW (2017). Dose-response relationship between weekly resistance training volume and increases in muscle mass: a systematic review and meta-analysis. Journal of Sports Sciences.
- Schoenfeld BJ, Ogborn D, Krieger JW (2016). Effects of resistance training frequency on measures of muscle hypertrophy: a systematic review and meta-analysis. Sports Medicine.
- American College of Sports Medicine (2009). Progression models in resistance training for healthy adults (position stand). Medicine & Science in Sports & Exercise.
Reviewed by the fytrr coaching team, September 2026.

Founder & Software Developer
Developing fitness software since 2018. Personal training experience: 15 years of strength training.
