The Claim
Concurrent long-duration static stretching and resistance training is associated with region-specific increases in muscle thickness within the plantar flexors of highly trained athletes, with hypertrophy ranging from 7.4% to 23.4% across multiple gastrocnemius sites over a 12-week period, suggesting that prolonged stretching may stimulate localized muscle growth when combined with established resistance training in experienced individuals.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Adding long static stretches to your regular weightlifting routine might actually help your calf muscles grow bigger in specific spots. Research suggests that doing this for 12 weeks could increase muscle size by up to 23% in experienced athletes.
See the scientific wording
Concurrent long-duration static stretching and resistance training is associated with region-specific increases in muscle thickness within the plantar flexors of highly trained athletes, with observed hypertrophy ranging from 7.4% to 23.4% across multiple gastrocnemius sites over 12 weeks. This suggests that prolonged stretching may stimulate localized muscle growth when performed alongside established resistance training regimens in experienced individuals.
What the research says
1 studyAdding long stretching sessions to a regular weightlifting routine helped one highly trained athlete's calf muscles grow significantly over three months, supporting the idea that stretching can boost muscle growth when combined with lifting.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.