Classic static stretching mostly changes your nervous system's tolerance for the stretch, not the muscle's length; targeted eccentric strengthening (like the Nordic hamstring curl) genuinely reduces hamstring injuries, which passive stretching has never been shown to do in a published trial.

noli's read

The cited numbers match a real published meta-analysis: including the Nordic hamstring exercise in an injury-prevention program cuts hamstring injuries by roughly 51% (Al Attar et al., British Journal of Sports Medicine, 2019 — 15 studies, 8,459 athletes, RR 0.49), a rare case of a viral video quoting a meta-analysis almost verbatim. The reframe that 'static stretching mostly changes sensation, not the muscle' is also backed by a recent meta-analysis (Sports Medicine, 2025) showing that range-of-motion gains from chronic stretching are explained as much by increased tolerance to stretch discomfort as by reduced stiffness, with no measurable lengthening of muscle fascicles. The claim that passive hamstring stretching has never reduced injury risk in a published trial lines up with the available systematic reviews (Small et al. 2008; Lauersen et al. 2014), which find no protective effect from stretching alone. The weak spot is the implicit overreach that 'these 2 stretches are all you need for life' — the Nordic curl specifically targets the hamstrings, and its benefit doesn't automatically transfer to other body areas. Overall this is one of the better-sourced posts in the batch: the numbers and mechanism match named meta-analyses, a solid evidence type (meta-analyses of RCTs).

the sources

1. 1Lauersen JB et al. 2014
2. 2Weppler CH, Magnusson SP 2010
3. 3Behm DG, Blazevich AJ, Kay AD, McHugh M 2015