# Strength Training Principles
Status: public
Confidence: medium (0.865) (verified)
Last verified: 2026-05-28
Generation: ai_assisted


## TL;DR

Strength training guidance is narrowed to public-health recommendations and an ACSM position stand. Adults are advised by CDC to include muscle-strengthening work, and ACSM supports progressive resistance-training protocols for continued adaptation.

## Evidence Notes

- CDC anchors weekly adult muscle-strengthening frequency.
- CDC examples anchor the all-major-muscle-groups wording.
- ACSM anchors the progressive resistance-training principle.

## Further Reading

- [Adult Activity: An Overview | Physical Activity Basics | CDC](https://www.cdc.gov/physical-activity-basics/guidelines/adults.html)
- [Current Guidelines | odphp.health.gov](https://odphp.health.gov/our-work/nutrition-physical-activity/physical-activity-guidelines/current-guidelines)
- [ACSM progression models in resistance training](https://pubmed.ncbi.nlm.nih.gov/19204579/)