Table 1.
Important serum metabolites that explain the valid PLS-DA models.
| Exercise Mode | Time | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 h | 2 h | HIIE | RE | |||||||||
| HIIE vs. CME | HIIE vs. RE | CME vs. RE | HIIE vs. CME | HIIE vs. RE | CME vs. RE | 0 vs. 1 h | 0 vs. 2 h | 1 vs. 2 h | 0 vs. 1 h | 0 vs. 2 h | 1 vs. 2 h | |
| 2−Hydroxyisobutyrate | −0.42 *** | - | 0.75 *** | - | - | - | - | - | - | - | - | - |
| 2−Hydroxyisovalerate | −0.14 * | - | - | - | - | 0.38 *** | - | 0.26 *** | - | - | 0.35 *** | 0.24 *** |
| Acetylcarnitine | −0.31 *** | - | - | - | −0.21 *** | - | 0.60 *** | 0.46 *** | - | 0.49 *** | - | - |
| Alanine | −0.28 *** | - | 0.43 *** | −0.20 *** | - | 0.28 *** | 0.48 *** | 0.22 *** | −0.18 *** | 0.50 *** | 0.23 *** | −0.18 *** |
| Choline | −0.10 * | - | - | - | - | - | - | - | - | - | - | - |
| Creatine | −0.18 *** | - | 0.19 ** | - | - | - | 0.26 *** | - | - | 0.22 *** | - | −0.20 *** |
| Cystine | - | - | - | - | - | - | - | 0.37 *** | - | - | - | - |
| Histidine | - | - | - | - | - | - | 0.28 *** | - | - | - | - | - |
| Homocysteine | −0.30 * | - | 0.42 ** | - | - | - | - | - | - | - | - | - |
| Hypoxanthine | - | 1.12 *** | 1.47 *** | - | 1.32 *** | 1.29 *** | - | - | - | 1.68 *** | 1.32 *** | - |
| Lactate | −0.61 *** | 0.60 *** | 3.04 *** | - | - | - | 1.54 *** | - | −0.52 *** | 3.29 *** | 0.37 *** | −0.67 *** |
| Leucine−isoleucine | - | - | - | 0.12 *** | - | −0.16 *** | - | −0.11 *** | −0.14 *** | - | −0.18 *** | −0.15 *** |
| Norvaline−valine | - | - | - | - | - | - | - | - | - | - | −0.15 *** | - |
| Pantothenate | −0.65 *** | 0.71 *** | 3.75 *** | - | - | - | 1.38 *** | - | - | 3.01 *** | - | −0.59 *** |
| Phenylalanine | - | - | - | - | - | - | 0.15 *** | - | −0.11 *** | - | - | - |
| Pyruvate | −0.80 *** | 0.37 * | 5.91 *** | - | - | - | 3.61 *** | - | −0.67 *** | 6.29 *** | 0.99 *** | −0.73 *** |
| Threonine | - | - | −0.15 *** | - | - | - | - | - | - | - | - | - |
| Uridine | −0.12 * | - | - | - | - | - | - | - | - | - | - | - |
Numbers indicate fold change and appear wherever a metabolite contributed to the discrimination. For example, the first number, −0.42, means that the value in CME was 0.42 fold lower than the value in HIIE. * p < 0.05, ** p < 0.01, *** p < 0.001, significant difference following Student’s t test.