Mixed
Low-load blood flow restriction (LL-BFR) resistance training produces type I fiber hypertrophy that is at least equal to, and sometimes greater than, type II fiber hypertrophy, contrasting with high-load training which preferentially hypertrophies type II fibers.
To target slow-twitch (Type I) muscle fibers, use low loads (20-50% of your one-rep max) combined with blood flow restriction cuffs. Perform sets to near failure with short rest periods (30 seconds). This method can stimulate growth in these fibers as effectively as, or better than, heavy lifting, which typically favors fast-twitch fibers.
Results of the review suggest that the magnitude of type I fiber hypertrophy is at least as great, and sometimes greater, than type II hypertrophy when performing LL-BFR. This finding is in contrast to HL training, where the magnitude of type II fiber hypertrophy tends to be substantially greater than that of type I myofibers.
Why this rating
Systematic review of 11 studies, but heterogeneity in protocols and small sample sizes limit strong causal inference.
Source
Fiber-Type-Specific Hypertrophy with the Use of Low-Load Blood Flow Restriction Resistance Training: A Systematic Review
Brad J. Schöenfeld et al. · Journal of Functional Morphology and Kinesiology · 2023
DOI 10.3390/jfmk8020051
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 →