Fig. 3.

Influence of dietary nitrate (black symbols) and placebo (white symbols) supplementation on 50-mile cycling time trial performance. The lines in the upper part of the figure show the ratio of power output to $\dot{V}{\text{O}}_2$ and the bars in the lower part of the figure show the split times taken to complete consecutive 10-mile splits. The power output to $\dot{V}{\text{O}}_2$ ratio was higher for the 20- to 30-mile (*p = 0.05) and 40- 50-mile (*p < 0.05) splits, and the 40- to 50-mile split was completed in a faster time (^# p < 0.05) following nitrate supplementation compared with placebo. However, there was no significant difference in overall performance between treatments (beetroot juice 136.7 ± 5.6 vs. placebo 137.9 ± 6.4 min). Values are shown as mean ± SD. $\dot{V}{O}_2$ oxygen uptake