Correlations between peak intensity (PI) and various biochemistry parameters in the two compression groups
Correlation coefficient	PI/AUC	PI/CK	PI/LDH	PI/MDA	PI/MPO
PI in the 2-h compression group (n = 61)
r	0.97	0.81	0.84	0.82	0.70
p-value	<0.001	<0.001	<0.001	<0.001	<0.001
PI in the 4-h compression group (n = 59)
r	0.97	0.75	0.78	0.82	0.63
p-value	<0.001	<0.001	<0.001	<0.001	<0.001

AUC, area under curve; CK, creatine kinase; LDH, lactate dehydrogenase; MDA, malondialdehyde; MPO, myeloperoxidase.