Table 2.

Metabolites and their coefficients for the correlation between signal intensity and the race effect for the five calculated O-PLS models.

Chemical shift	Signal assignments	All finishers p = 10−7	Distance p = 10−5	90 km p = 10−4	120 km p = 10−6	160 km p = 10−3
0.84	CH3 lipids		−0.443		−0.78	−0.613
0.91	Isoleucine			0.696
0.96	Leucine	0.7		0.792	0.76	0.748
0.98; 1.03	Valine	0.6425		0.7045	0.798	0.6865
1.06	3-Hydroxy isobutyrate	0.883		0.876	0.961	0.966
1.13	Alpha-oxo-isovalerate	0.52		0.67	0.625	0.664
1.19; 4.15	Beta hydroxybutyrate	0.678	0.514	0.701	0.823	0.96
1.23	CH2 lipids		−0.429	0.597	0.358	−0.582
1.32;4.10	Lactate	0.8815	−0.42	0.8955	0.9305	0.82
1.47	Alanine	−0.732		−0.629	−0.789	−0.887
1.91	Acetate	0.664	0.552		0.769	0.926
1.96	N-Acetyl 1	−0.694		−0.575	−0.868	−0.776
2.07	N-Acetyl 3	−0.728	−0.527	−0.607	−0.885	−0.768
2.14	Glutamate + glutamine	0.772		0.773	0.783	0.929
2.22	Acetone	0.621
2.27	Acetoacetate	0.748	0.582	0.587	0.943	0.826
2.33	Glutamate	0.81	0.541	0.711	0.508	0.923
2.41	Glutamine	0.765	0.639	0.74	0.941	0.966
2.51; 2.54 2.64;2.68	Citrate	0.651		0.7625	0.809
2.97	Lysine
3.03 3.93	Creatine	0.888	0.583	0.911	0.963	0.915
3.18	Choline	0.697		0.69	0.666	0.891
3.20	Phosphocholine	−0.587		−0.515	−0.901	−0.499
3.24, 3.41–3.91	Glucose	−0.726		−0.8265	−0.877	−0.766
3.57; 3.64; 3.66	Glycerol	0.743		0.68	0.797	0.768
5.23	Glucose	−0.774		−0.821	−0.799	−0.846
5.28	CH = CH lipids		−0.535	0.765		−0.522
5.77	Urea	0.577	0.511	0.507	0.493	0.831
6.89; 7.18	Tyrosine	0.8725		0.904	0.911	0.94
7.04	Histidine
7.291	Tryptophan	0.666		0.725	0.711	0.851
7.37	Phenylalanine	0.578		0.825	0.693	0.634

Only metabolites presenting a correlation coefficient over I0.5I are given. The p-value for R = l0.5l is given for each model. All finishers: a comparison of pre- and post-races samples for all 40 horses in the study, regardless of the race distance; distance: a model of post-race samples as a function of the race distance; 90, 120, and 160 km: comparisons of pre- and post-race samples for each race distance separately.