Figure 1

Effects of oral ATP supplementation on total strength and vertical jump power. (A) Percent change in total strength as the of sum of the 1-RM in bench press, squat, and deadlift in male participants undergoing 12 weeks of intense, periodized resistance training with an overreaching cycle during weeks 9 and 10. Participants were supplemented with either a Placebo - - ♦- - (n=10) or 400 mg ATP/d —∎— (n=11) during the 12-week training program. When compared with placebo supplementation total strength was increased with ATP supplementation over the 12 week study (‡ p < 0.001, Trt*time). During the overreaching cycle of the study, total strength decreased in the placebo-supplemented group relative to the ATP-supplemented group during weeks 9 and 10 († p < 0.001, Trt*time). Additionally, participants supplemented with ATP had greater mean strength at the 8, 9, 10, and 12 week time-points compared with placebo-supplemented participants (# p < 0.05). (B) Percent change in vertical jump power in male participants undergoing 12 weeks of intense, periodized resistance training with an overreaching cycle during weeks 9 and 10. Participants were supplemented with either a Placebo - - ♦- - (n=10) or 400 mg ATP /d —∎— (n=11) during the training program. ATP supplementation resulted in a greater increase in vertical jump power over the 12 week study (‡ p < 0.001, Trt*time). The increased intensity of the overreaching cycle during the study resulted in a significant decrease in vertical jump power in the placebo-supplemented participants compared with the ATP-supplemented participants during weeks 9 and 10 († p < 0.007). Additionally, ATP-supplemented participants had greater vertical jump power at 8, 9, 10, and 12 weeks of study compared with placebo-supplemented participants (# p < 0.05).