Effects of Low-Load, High-Repetition Resistance Training on Maximum Muscle Strength and Muscle Damage in Elite Weightlifters: A Preliminary Study.
Level 2 - randomized trial
Individual randomized controlled trial
PubMed 38069402 · doi:10.3390/ijms242317079
What was done
Eighteen male weightlifters were randomized to one of three 8-week supervised resistance training regimens: high-load low-repetition (HL), low-load high-repetition (LH), or a combination of both (COMBI). Researchers evaluated changes in skeletal muscle mass, growth hormone levels, maximal muscle strength (1-repetition maximum back squat and back muscle strength), anabolic signaling pathways (total mTOR, p70S6K1, 4E-BP1, and eEF2 phosphorylation), and circulating markers of muscle damage (creatine kinase and lactate dehydrogenase).
What was found
The abstract reports directional outcomes without numerical values, confidence intervals, or exact p-values. All three training groups achieved significant increases in skeletal muscle mass, growth hormone levels, and maximal muscle strength. While total mTOR protein expression remained unchanged, phosphorylation of p70S6K1, 4E-BP1, and eEF2 differed significantly among regimens. The LH group experienced a significant reduction in creatine kinase and lactate dehydrogenase compared to the high-load protocols.
Why it matters
This suggests low-load, high-repetition training may yield comparable hypertrophy and strength adaptations to traditional heavy lifting in trained athletes while reducing biomarkers associated with muscle damage and fatigue.
Limits
The sample size is very small (18 participants divided across three arms, approximately 6 per group). The abstract reports no numerical estimates or measures of variance. The study was conducted exclusively in male weightlifters over an 8-week window, limiting generalizability to females, untrained cohorts, or long-term athletic development.
Cited by
- contradicts Scientific evidence indicates that higher-repetition resistance training creates more muscle damage than lower-repetition training.