Pre-workout supplement on HIFT workout kinetics
Disciplines
Medicine and Health Sciences
Abstract (300 words maximum)
High-intensity functional training (HIFT) programs modify workouts daily, but commonly emphasize fast-paced work by, for example, instructing that ‘as many repetitions as possible’ (AMRAP) be completed within a duration. Multi-ingredient pre-workout supplements (S) often contain ingredients thought to aid in energy availability, and these might be useful for maintaining power during HIFT. Therefore, to examine the acute effects of a multi-ingredient pre-workout supplement and exercise duration on exercise kinetics within a high-intensity functional training workout, 12 men and 10 women with HIFT experience (≥ 2 years) were recruited to complete four experimental visits across four consecutive weeks in randomized, cross-over fashion. On each visit, participants either consumed S or a non-caloric placebo (P), rested 40 minutes, and then completed a 5- or 15-minute AMRAP circuit of rowing, barbell thrusters, and box jumps. The rowing ergometer recorded average strokes per minute (SPM), 500-m split pace, calories per hour, and power on each round. A three-dimensional camera monitored barbell velocity and power during thrusters. Meanwhile, in-ground force plates measured average peak force, mean impulse, and rate of force development (RFD) on all box jumps. Analysis of variance with repeated measures revealed a main condition effect for SPM (p = 0.041), where a faster pace was averaged during S (30.4 ± 0.9 SPM) compared to P (29.1 ± 0.7 SPM). Condition x time x sex interactions (p < 0.05) were also noted for mean impulse and RFD on the box jumps. However, sex differences predominantly influenced the interaction for mean impulse while post-hoc analysis did not reveal specific differences for RFD. No other differences related to supplemental condition were observed, including repetitions completed. Thus, the multi-ingredient supplement enabled a faster rowing pace to be maintained, and differentially affected box jump impulse in men and women, during both a 5- and 15-minute HIFT AMRAP.
Academic department under which the project should be listed
WCHHS - Exercise Science and Sport Management
Primary Investigator (PI) Name
Gerald Mangine
Additional Faculty
Jacob Grazer, Exercise Science, jgrazera@kennesaw.edu
Tiffany Esmat, Exercise Science, tesmat@kennesaw.edu
John Mclester, Exercise Science, jmcleste@kennesaw.edu
Pre-workout supplement on HIFT workout kinetics
High-intensity functional training (HIFT) programs modify workouts daily, but commonly emphasize fast-paced work by, for example, instructing that ‘as many repetitions as possible’ (AMRAP) be completed within a duration. Multi-ingredient pre-workout supplements (S) often contain ingredients thought to aid in energy availability, and these might be useful for maintaining power during HIFT. Therefore, to examine the acute effects of a multi-ingredient pre-workout supplement and exercise duration on exercise kinetics within a high-intensity functional training workout, 12 men and 10 women with HIFT experience (≥ 2 years) were recruited to complete four experimental visits across four consecutive weeks in randomized, cross-over fashion. On each visit, participants either consumed S or a non-caloric placebo (P), rested 40 minutes, and then completed a 5- or 15-minute AMRAP circuit of rowing, barbell thrusters, and box jumps. The rowing ergometer recorded average strokes per minute (SPM), 500-m split pace, calories per hour, and power on each round. A three-dimensional camera monitored barbell velocity and power during thrusters. Meanwhile, in-ground force plates measured average peak force, mean impulse, and rate of force development (RFD) on all box jumps. Analysis of variance with repeated measures revealed a main condition effect for SPM (p = 0.041), where a faster pace was averaged during S (30.4 ± 0.9 SPM) compared to P (29.1 ± 0.7 SPM). Condition x time x sex interactions (p < 0.05) were also noted for mean impulse and RFD on the box jumps. However, sex differences predominantly influenced the interaction for mean impulse while post-hoc analysis did not reveal specific differences for RFD. No other differences related to supplemental condition were observed, including repetitions completed. Thus, the multi-ingredient supplement enabled a faster rowing pace to be maintained, and differentially affected box jump impulse in men and women, during both a 5- and 15-minute HIFT AMRAP.