Best exercises for each muscle
Pick a muscle to see the exercises that train it hardest, ranked by how well they build muscle, with what they cost in fatigue and joint risk.
Upper body
Core
Lower body
How to read the ratings
Scores run 1-5 and average the sources behind each exercise. Each rating is a language-model summary of claims made in the named videos and studies, fact-checked against their transcripts. Treat them as hints, not verdicts: open an exercise to see every claim and its source.