Beet Root Dietary Nitrate Supplement.
TLDR: 400-800mL of beetroot juice for 2-6 days (up to 15) pre-race may enhance high-intensity exercise performance.
More Details: Dietary nitrate supplementation is growing in popularity as a sports nutritional supplement.
Inorganic nitrate is abundant in green leafy vegetables and beetroot.
Nitrate reduces the oxygen cost of submaximal exercise and can, in some circumstances, enhance exercise tolerance and performance.
There is more evidence to suggest that nitrate supplementation is ergogenic for maximal exercise under 30 minutes, but for events longer than 40 minutes it likely at least can’t hurt.