Table 1. Effects of leg press exercise on adenine nucleotides, IMP, PCr, Cr, P_i and energy charge at rest and during exercise.

	Pre exercise			Mid exercise (5 reps)			Post exercise (10 reps)
ATP	6.52	±	0.38	6.19	±	0.59	6.42	±	0.57
ADP	0.85	±	0.03	0.89	±	0.08 a	0.91	±	0.10
AMP	0.08	±	0.04	0.08	±	0.03	0.09	±	0.03
IMP	0.01	±	0.00	0.01	±	0.00	0.08	±	0.11
TAN	7.44	±	0.40	7.15	±	0.66	7.41	±	0.67
PCr	20.24	±	6.31	11.68	±	7.82	7.74	±	5.53 ab
Cr	8.66	±	3.92	16.97	±	6.33	25.45	±	3.8 a
PCr + Cr	28.9	±	3.94	30.56	±	6.19	34. 55	±	6.23
Energy charge	0.933	±	0.01	0.927	±	0.01 a	0.927	±	0.004 a
Pi		2.9		17.63	±	15.74	24.8	±	15.8 a

Values are means ± SD in mmol·kg⁻¹ wet muscle, except [P_i] (mmol·l⁻¹ intracellular water) and energy charge; n = 6, except at post exercise, where n = 4-5. TAN, total adenine nucleotides (ATP + ADP + AMP); IMP, Inosine 5′-monophosphate; Cr, Creatine. For calculations of P_i and energy charge see METHODS.

^asignificant difference (P<0.05) with pre exercise value.

^bsignificant difference (P<0.05) with middle exercise value