Table 2 Plasma concentration of purine metabolites and erythrocyte HGPRT activity depending on the training profile.

From: Purine metabolism in sprint- vs endurance-trained athletes aged 20‒90 years

  Speed-power (n = 55) Endurance (n = 91) Untrained (n = 61) ANOVA
P-value*
Effect size (η2)
Hxrest (µmol·l−1) 1.7 ± 0.7†.‡ 2.2 ± 0.5†,# 3.0 ± 0.9‡,# <0.001 0.37
Hxpost (µmol·l−1) 17.6 ± 7.4†.‡ 20.8 ± 5.0†,# 24.9 ± 5.5‡,# <0.001 0.20
Hxpost-rest (µmol·l−1) 15.9 ± 6.8 18.6 ± 4.6 21.9 ± 4.7‡,# <0.001 0.17
Xrest (µmol·l−1) 1.4 ± 0.8 1.4 ± 0.6 1.7 ± 0.7# 0.011 0.04
Xpost (µmol·l−1) 2.5 ± 0.9 2.7 ± 0.7 2.9 ± 0.7# 0.003 0.06
Xpost-rest (µmol·l−1) 1.1 ± 0.3 1.2 ± 0.4 1.2 ± 0.3 0.103 0.02
UArest (µmol·l−1) 299.9 ± 28.5 307.8 ± 25.5 314.3 ± 27.6# 0.017 0.04
UApost (µmol·l−1) 364.2 ± 42.6†,‡ 389.2 ± 31.4†,# 408.2 ± 30.7‡,# <0.001 0.18
UApost-rest (µmol·l−1) 64.3 ± 21.2†,‡ 81.3 ± 15.8†,# 93.8 ± 16.3‡,# <0.001 0.29
HGPRT (nmolIMP ·mgHB−1·h−1) 79.1 ± 1.6†,‡ 76.3 ± 2.1†,# 73.0 ± 1.7‡,# <0.001 0.60
  1. Data are means ± SD; *between-group differences as estimated by ANOVA. Post-hoc Scheffè test at P < 0.05: significantly different from untrained subjects. – significantly different from endurance-trained athletes. #Significantly different from speed-power-trained athletes. Legend: Hx ‒ hypoxanthine, HGPRT ‒ hypoxanthine-guanine phosphoribosyltransferase, UA ‒ uric acid, X ‒ xanthine, rest ‒ resting value, post ‒ post-exercise value, post-rest ‒ the difference between post-exercise and resting value.