Fig. 2
From: Beetroot juice — a suitable post-marathon metabolic recovery supplement?
Unfolded principal component analysis (a) with, and (b) without confidence intervals, depicting the global recovery trend of the beetroot and placebo cohort over time. Abbreviations: P0: pre-marathon; P1: post-marathon; P2: 24 h post-marathon; P3: 48 h post-marathon; PC: principal component. The ellipsoids in (a) represent 90% confidence intervals of each centroid