Associations between Borg’s rating of perceived exertion and changes in urinary organic acid metabolites after outdoor weight-bearing hiking

Figure 1 Changes in organic acids and myoglobin levels before and after exercise. A: Volcano maps before and after training; B: Statistical analysis of myoglobin levels before and after training.

Figure 2 Principal component analysis scores of organic acid metabolites among the 6-12, 13-16 and 17-20 score groups.

Figure 3 Orthogonal partial least-squares discrimination analysis of Borg’s Rating of Perceived Exertion Scale and organic acid metabolism. A: Orthogonal partial least-squares discrimination analysis (OPLS-DA) between the groups with scores of 6-12 and 13-16; B: OPLS-DA between the groups with scores of 6-12 and 17-20; C: OPLS-DA between the groups with scores of 13-16 and 17-20; D: OPLS-DA between the groups with scores of 6-12 and 13-20.

Figure 4 Heatmap of Borg’s rating of perceived exertion Scale and organic acid metabolites. BRPE: Borg’s rating of perceived exertion.

Figure 5 Radar chart of the metabolism of different organic acids. A: Radar chart including creatinine; B: Radar chart excluding creatinine.

Figure 6 Pathway analyses of different organic acid metabolites between the groups with Borg’s rating of perceived exertion scores of 6-12 and 13-20. TCA: Tricarboxylic acid.

Figure 7 Correlation analysis between Borg’s rating of perceived exertion scale and myoglobin levels. A: Statistical analysis between the groups with scores of 6-12 and 13-20; B: Spearman’s correlation analysis between the Borg’s rating of perceived exertion scale and myoglobin levels. BRPE: Borg’s rating of perceived exertion.