Mixed
Long-duration static stretching (1 hour daily for 6 weeks) induces significant increases in maximal strength, muscle thickness, and range of motion in the plantar flexors for both males and females, with males demonstrating superior magnitude of adaptation.
If you want to increase calf strength and size without heavy weights, you can try static stretching for 1 hour daily using a device that holds your ankle at a stretched position. You need to feel significant discomfort (7-8/10) at the start, but it will subside. Do this for 6 weeks. Note that men will likely see bigger gains than women, but both sexes will improve strength, size, and flexibility.
Statistically significant increases in MSt of 6%–15%... ROM of 6%–21%... and MTh of 4%–14%... from pre-to post-test were observed, considering both sexes and both legs. Furthermore, there was a significant higher increase in MSt, MTh and ROM in male participants.
Why this rating
Randomized controlled trial with active control (contralateral leg), clear metrics, and statistical significance, though limited to healthy, active young adults.
Source
Sex differences in stretch-induced hypertrophy, maximal strength and flexibility gains
Konstantin Warneke et al. · Frontiers in Physiology · 2023
DOI 10.3389/fphys.2022.1078301
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →