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Carbohydrate intake of ~1.2 g/kg body mass per hour for up to 4 hours post-exercise is essential for restoring glycogen reserves, supporting immune system energy needs, and facilitating tissue repair in athletes.

The paper recommends consuming approximately 1.2 grams of carbohydrate per kilogram of body mass per hour for up to four hours after exercise to optimize glycogen restoration, immune function, and tissue repair. This is part of the 'Refuel' component of the 4Rs framework for post-exercise recovery within an allostasis paradigm.

Last updated: Jul 7, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score32/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. The 4Rs Framework of Sports Nutrition: An Update with Recommendations to Evaluate Allostatic Load in Athletes.

observational

Bonilla DA, Stout JR, Gleeson M, Campbell BI, Escalante G, Rojas-Valverde D, Petro JL, Kreider RB, Odriozola-Martínez A · Life (Basel, Switzerland) (2025)

Participants: N/A
Duration: N/A
Intervention: Ketogenic diet vs. carbohydrate-rich diet
Outcome: Athletic performance
Effect Size: N/A
Population: Athletes (general, not specified further)

Result:

PubMed: 40566521DOI: 10.3390/life15060867

Mechanism Graph

Carbohydrate ingestion post-exercise provides glucose for glycogen synthesis in muscles and liver
↓
Supports energy demands of immune cells (e.g., lymphocytes, macrophages) during recovery
↓
Provides substrate for tissue repair processes (e.g., protein synthesis and cellular regeneration)
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Result: Enhanced glycogen restoration, immune function, and tissue repair

Limitations

  • ⚠The abstract does not provide specific quantitative effect sizes or statistical significance for this claim
  • ⚠The recommendation may not apply to all athlete types or exercise modalities (e.g., endurance vs. strength) without further individualization
  • ⚠The claim is based on a framework update and not a direct experimental trial reported in this paper

Frequently Asked Questions

What is the recommended carbohydrate intake after exercise for athletes?▼

The paper recommends ~1.2 g/kg body mass per hour for up to 4 hours post-exercise to restore glycogen, support immune function, and aid tissue repair.

Does a ketogenic diet affect athletic performance compared to carbohydrate-rich diets?▼

The paper states that a ketogenic diet generally has neutral or negative effects on athletic performance compared to carbohydrate-rich diets, despite changes in substrate utilization.

What is the 4Rs framework in sports nutrition?▼

The 4Rs framework includes Rehydration, Refuel, Repair, and Recuperate, designed to optimize post-exercise recovery within an allostasis paradigm.

How does carbohydrate intake support the immune system after exercise?▼

Carbohydrate intake provides energy for immune cells (e.g., lymphocytes) that are activated during recovery, helping to maintain immune function and reduce infection risk.

Products

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References

  1. 1.Bonilla DA, Stout JR, Gleeson M, Campbell BI, Escalante G, Rojas-Valverde D, Petro JL, Kreider RB, Odriozola-Martínez A. "The 4Rs Framework of Sports Nutrition: An Update with Recommendations to Evaluate Allostatic Load in Athletes.." Life (Basel, Switzerland), 2025. PMID: 40566521 DOI: 10.3390/life15060867
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.