Table 4.

The effect of exercise on APRT, HPRT and PRPP-S activities and PRPP concentration in RBCs

	Sedentary group			Trained group
	Rest	Post-exercise	30-min recovery	Rest	Post-exercise	30-min recovery
APRT (nmol/mgHb/min)	0.39 (0.35–0.43)	0.39 (0.38–0.42)	0.37 (0.33–0.42)	0.48 (0.48–0.57)**	0.44 (0.42–0.49)**	0.45 (0.42–0.52)**
HGPRT (nmol/mgHb/min)	1.68 (1.55–1.88)	1.77 (1.61–1.88)	1.68 (1.53–1.82)	1.91 (1.86–2.03)**	1.84 (1.85–1.93)**	1.87 (1.84–1.92)**
PRPP–S (nmol/mgHb/min)	1.23 (1.19–1.25)	1.23 (1.20–1.24)	1.19 (1.17–1.22)	1.32 (1.29–1.35)**	1.30 (1.22–1.35)**	1.31 (1.27–1.35)**
PRPP (µmol/L)	5.6 (4.90–5.90)	5.2 (5.24–6.70)	4.9 (4.86–5.52)	7.1 (6.52–7.85)*	7.0 (5.82–7.33)*	7.1 (6.91–7.4)*

Values are given as median (Q ₂₅–Q ₇₅)

APRT adenine phosphoribosyltransferase (EC 2.4.2.7), HGPRT hypoxanthine-guanine phosphoribosyltransferase (HGPRT; EC 2.4.2.8), PRPP-S 5-phosphoribosyl-1-pyrophosphate synthetase (EC 2.7.6.1), PRPP 5-phosphoribosyl-1-pyrophosphate

* P < 0.01; ** P < 0.001; different from sedentary subjects