Moreover, isometric exercise performance
is somewhat sensitive to innate muscle fiber type distribution , which was not tested or controlled for in this investigation. We observed no differences in volume (weight lifted × repetitions x sets) lifted for any exercise over the course Selleck SRT2104 of the training period. This was in contrast to common findings of other supplement plus training studies involving caffeine [12, 50], beta alanine [5, 9], and creatine , but not all studies . The lack of difference between groups in training volume may have been a result of our study design rather than supplement effects. All participants were instructed that the goal of every
set should be failure and they were to achieve this by Ferrostatin-1 datasheet selecting weights that caused them to fail at a specific number of repetitions (10 for weeks one and two, six for weeks three and four, and four for weeks five and six). Blasticidin S The number of repetitions was controlled in order to facilitate the periodized training goals. If participants lifted to failure on every set, differences in training volume may have been evident. On the other hand, eliminating training volume as a variable leaves manipulation of hypertrophic pathways by the supplement ingredients as the most probable explanation for increased LM in MIPS but not for PLA. In addition, all of the participants had performed the required exercises in past workouts prior to beginning the study. The participants were also familiar with overloading the muscles with periodized training. However, we did not survey
or record the degree to which the study routine was similar to or different from the participant’s regular workout program. Conclusions Consumption of MIPS before and after RT during the course of a periodized six-week RT program resulted in significant improvements in LM in trained males, whereas the consumption of an isocaloric PLA did not. At the dosages consumed and with the specific population in this study, MIPS consumption did not appear to offer advantages in measures of absolute or relative muscle strength, acetylcholine but it did elicit gains in anaerobic power. Continued investigation of these or similar products is warranted as questions about the influence of performance supplements on volitional training volume should be answered. Additionally, future research should investigate MIPS use in populations that include both women and older populations and incorporate exercise modalities that extend beyond traditional resistance training. Acknowledgements We would like to thank Gold’s Gym (Tallahassee, FL), Jim Burtoft and Joe Burtoft for the use of their facilities.