Volume, intensity and timing of muscle power potentiation are variable

Differences in peak times were all trivial or small (i.e. d<0.50), though all comparisons with peak force (6.57 min±5.33) were large (d>0.80), which is to say the peak force reached its peak substantially later than the other dependent variables. In assessing just the peak data, magnitude-based inference revealed both the 5x70 and 3x85 protocol elicited changes that exceed 75% likelihood of exceeding the smallest worthwhile change (SWC) for peak power (89% and 80% likely respectively) and velocity (77% and 87% likely respectively). The 10x70 also had a substantial likelihood of potentiating peak velocity above the SWC (75% likely). The 5x70 protocol had an 80% likelihood of exceeding the SWC in mean power. Discussion Most measures peaked at one-, three-, or five-minutes though this peak was often not greater than the smallest worthwhile change. There was sufficient inconsistency in the timing of the peak that there was no statistically significant potentiation in the repeated measures ANOVA. Magnitude-based inferences revealed that while no protocol had a substantial likelihood of potentiating the peak vertical jump above the SWC, the 5x70 protocol had the most consistent substantial likelihood (i.e. >75%) of increasing the peak of most dependent variables, in particular power as well as peak velocity. We were unable to consistently predict if these peaks occurred at 1-, 3, or 5 minutes post-stimulation though declines after 5 min seems probable.Volume, intensity and timing of muscle power potentiation are variable Behm, D.G.1, Chaouachi, A.2, Abed, M.F.2, Poulos, N.3, Drinkwater, E.J.4 1: Newfoundland, Canada, 2: Tunis Tunisia, 3. Aspire, Qatar, 4. Bathurst Australia Introduction Whereas muscle potentiation is consistently demonstrated with evoked contractile properties, the potentiation of functional and physiological measures is more inconsistent. The objective of the study was to compare a variety of conditioning stimuli volumes and intensities over a 15-minute