International society of sports nutrition position stand: nutrient timing.

Study note • PMID 28919842

International society of sports nutrition position stand: nutrient timing.

ELI5

In plain language

Takeaways

What the abstract suggests

• • Study question: The International Society of Sports Nutrition (ISSN) provides an objective and critical review regarding the timing of macronutrients in reference to healthy, exercising adults and in particular highly trained…
• • In this review, the abstract suggests a positive relationship with Time-trial performance.
• • Population: n=32 well-trained cyclists.
• • Protocol cues (full paper): 12 g/kg • 10 g/kg • 4 g/kg • 1.5 g/kg • 2 g/kg • 1.0 g/kg.

Protocol

Protocol (as reported)

• • Intervention/exposure: carbohydrate, carb.
• • Dose/time/duration cues found in the full paper: 12 g/kg • 10 g/kg • 4 g/kg • 1.5 g/kg • 2 g/kg • 1.0 g/kg • 1.2 g/kg • 8 g/kg.
• • Outcomes: Time to exhaustion, Time-trial performance, Fat oxidation.
• • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.

Fit

Who it helps, and who should skip it

Methods

What the study actually did

• • Design: review (randomized, double-blind, placebo-controlled, crossover).
• • Population: n=32 well-trained cyclists.
• • Outcomes measured: Time to exhaustion, Time-trial performance, Fat oxidation.
• • Protocol cues mentioned: 1.2 g/kg • 8 mg/kg • 0.8 g/kg • 0.4 g/kg • 0.40 g/kg • 3-8 mg/kg • 4 h • 60 min.
• • Source: PubMed PMID 28919842 (2017) — Journal of the International Society of Sports Nutrition.

Full paper

What the full paper adds

• • Design features (paper): randomized, double-blind, placebo-controlled, crossover.
• • Participants (paper): n=32 well-trained cyclists.
• • More protocol detail (paper): 12 g/kg • 10 g/kg • 4 g/kg • 1.5 g/kg • 2 g/kg • 1.0 g/kg • 1.2 g/kg • 8 g/kg.

Results excerpt

What the abstract reports

“More research is needed to determine the influence of combining an exercise program with altered meal frequencies on weight loss and body composition with preliminary research indicating a potential benefit.Ingesting a 20-40 g protein dose (0.25-0.40 g/kg body mass/dose) of a high-quality source…”

Note: excerpts are short; for full context, read the paper.

Limits

Limitations & bias

• • Abstract-only summaries can miss critical details (population, protocol, adherence, and context).
• • Reviews and consensus statements mix protocols and populations; recommendations may not match your exact constraints.
• • If your context differs (elite vs recreational; cycling vs running), adjust expectations and be conservative.
• • This is performance information, not medical advice.