Caffeine and Beetroot Juice Optimize 1,000-m Performance: Shapley Additive Explanations Analysis

Mar 27, 2025American journal of men's health

How Caffeine and Beetroot Juice May Improve 1,000-Meter Running Performance

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Abstract

Participants using caffeine and beetroot juice combined improved their 1,000-m run performance significantly compared to placebo.

  • Caffeine (6 mg/kg body weight) and beetroot juice (70 mL) were tested for their effects on running performance in healthy male participants.
  • The combination of caffeine and beetroot juice led to better performance in the first and second 1,000-m runs compared to placebo and beetroot juice alone.
  • Performance declined after recovery in both beetroot juice and placebo groups, while it improved in the combination group.
  • Post-exercise heart rate and blood lactate levels were highest in the caffeine and beetroot juice group.
  • analysis identified body fat percentage, weight, and age as the most important factors influencing performance.

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Key numbers

CAF + BJ vs. PLA
Improvement in Performance
CAF + BJ group performed significantly better than PLA in the first 1,000-m run (< .01).
higher in CAF + BJ
Blood Lactate Levels
CAF + BJ group had the highest blood lactate levels immediately post-exercise.

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