Table 1.

Effect of ATP supplementation on muscle strength and power in participants performing a 12 week weight training regimen.^a

	Week of Study
	0	4	8	9	10	12	p-valueb
Squat, kg
Placebo	145.2 ± 10.2	151.6 ± 11.0	156.4 ± 11.6	150.7 ± 10.4	147.2 ± 10.7	151.3 ± 10.3
ATP	146.1 ± 5.8	155.2 ± 7.7	160.7 ± 7.6	159.0 ± 6.1#	158.6 ± 6.9#	165.3 ± 8.3#	<0.001
Bench Press, kg
Placebo	115.2 ± 9.4	119.3 ± 9.4	121..4 ± 9.3	113.4 ± 7.2	115.7 ± 8.0	119.3 ± 8.7
ATP	117.2 ± 5.5	122.1 ± 5.0	124.5 ± 5.2	120.0 ± 4.8	121.2 ± 5.5	124.2 ± 5.4	0.65
Deadlift, kg
Placebo	169.8 ± 11.0	177.0 ± 10.7	182.5 ± 10.7	173.2 ± 10.8	174.8 ± 8.1	182.0 ± 9.2
ATP	176.2 ± 4.9	189.2 ± 5.9	200.3 ± 7.4#	193.4 ± 6.4#	193.8 ± 8.3#	205.2 ± 6.9#	0.002
Total Strength, kg
Placebo	430.2 ± 28.1	448.0 ± 28.9	460.2 ± 29.6	437.3 ± 26.1	437.6 ± 25.1	452.6 ± 25.9
ATP	439.4 ± 14.9	466.5 ± 17.1	485.6 ± 18.1#	472.4 ± 15.2#	473.6 ± 18.3#	494.7 ± 17.9#	<0.001
Wingate Peak Power, Watts
Placebo	882.2 ± 54.1	930.3 ± 55.7	985.3 ± 64.7	922.9 ± 61.9	939.9 ± 65.7	977.4 ± 66.5
ATP	882.8 ± 27.0	960.9 ± 36.1	1003.5 ± 40.4	964.2 ± 38.0	974.7 ± 39.8	1011.9 ± 42.4	0.48
Vertical Jump power, Watts
Placebo	5318 ± 410	5711 ± 439	5918 ± 443	5697 ± 436	5626 ± 431	5932 ± 452
ATP	5185 ± 203	5618 ± 213	5954 ± 202#	5838 ± 218#	5827 ± 208#	5981 ± 207#	<0.001

^aMean ± SEM for n = 11 ATP (400 mg ATP/d taken 30 min prior to exercise) and n = 10 placebo supplemented participants.

^bProbability of treatment by time difference between the placebo and the ATP treatments over the 12-week study. The mixed model ANOVA in SAS® was used with the main effects of treatment, time and treatment by time, with the value for week 0 used as a covariate.

^#Significantly different than corresponding placebo, t-test (p < 0.05).