Carbohydrate intake and resistance-based exercise: are current recommendations reflective of actual need?
Level 5 - mechanism / opinion, no new human data
Narrative review evaluating carbohydrate requirements and cellular mechanisms in resistance exercise without systematic methodology
PubMed 27993175 · doi:10.1017/S0007114516003949
What was done
The authors conducted a review examining the empirical and physiological evidence surrounding dietary carbohydrate requirements for resistance-based exercise performance, glycogen depletion, and downstream cell signaling mediating adaptation.
What was found
Current guidelines recommend a moderately high daily carbohydrate intake of 3–7 g/kg per day, derived primarily from endurance exercise research. The abstract reports that true glycogen depletion is unlikely to occur during standard resistance training. Furthermore, acute resistance exercise performance and mTORC1 (mammalian target of rapamycin complex 1) signaling pathways appear unaffected by carbohydrate restriction or low muscle glycogen concentrations. No specific quantitative performance metrics were reported in the abstract.
Why it matters
It questions the standard practice of extrapolating high-carbohydrate endurance nutrition guidelines to resistance-trained populations, suggesting that lower carbohydrate intakes may adequately support resistance exercise performance and anabolic signaling.
Limits
This is a narrative review presenting mechanistic arguments rather than a systematic review or meta-analysis. The abstract provides no primary human trial data, exact sample numbers, or quantitative effect sizes comparing performance outcomes across differing carbohydrate doses.
Cited by
- supports Most resistance training sessions are not extremely glycogen depleting.