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Nutrition/Ergogenic Aids

(69) ACUTE EFFECT OF A MUTI-INGREDIENT PRE-WORKOUT SUPPLEMENTATION ON POWER EXPRESSION THROUGH A HIGH-INTENSITY FUNCTIONAL TRAINING WORKOUT

Thursday, July 13, 2023
12:00 PM – 1:30 PM East Coast USA Time
Location: Milano III-IV

    Poster Presenter(s)

  • Christopher Staples

    Graduate Assistant
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Acworth, Georgia, United States

    • Author(s)

  • JF

    Jacob Fanno

    Student
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Kennesaw, Georgia, United States

  • Ashley Hines

    Graduate Research Assistant
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Kennesaw, Georgia, United States

  • James Henley

    Graduate Teaching Assistant
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Adairsville, Georgia, United States

  • BR

    Britton Rellinger

    Undergraduate research assistant
    KSU
    Kennesaw, Georgia, United States

  • Wysmark Chaves

    Graduate Teaching Assistant
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Marietta, Georgia, United States

  • Ian M. Burks (he/him/his)

    Student
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA
    winston, Georgia, United States

  • HY

    Holden Young

    Student Assistant
    KSU
    Kennesaw, Georgia, United States

  • CS

    Colton Sheetz

    Undergraduate Research Assistant
    KSU
    Kennesaw, Georgia, United States

  • Jacob Grazer, PhD, CSCS

    Program Director: MS in Exercise Science
    Kennesaw State University
    Atlanta, Georgia, United States

  • TE

    Tiffany Esmat

    Professor/Chair
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Kennesaw, Georgia, United States

  • JM

    John McLester

    Professor
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Kennesaw, Georgia, United States

  • Gerald T. Mangine, PhD

    Associate Professor
    Exercise Science and Sport Management, Kennesaw State University, Kennesaw, Georgia
    Kennesaw, Georgia, United States

Abstract Details: A common high-intensity functional training (HIFT) workout structure is to have trainees complete the same circuit of exercises for ‘as many repetitions as possible’ (AMRAP) within a given duration. Performance is dependent on sustaining the necessary power to complete each movement at a pace that also minimizes breaks due to fatigue. This ability is known to improve with training and HIFT experience. However, several individual nutritional ingredients are known to impact energy availability and/or assist with fatigue management, and these may collectively be found in a variety of pre-workout formulations. Thus, supplementing with a pre-workout formulation may provide a greater benefit to AMRAP performance than training and experience alone, but no study has investigated the acute effects of such formulations in experienced HIFT trainees.

Purpose: To examine the acute effects of a pre-workout supplement on power expression and HIFT workout performance.

Methods: Men (n=7: 28.8 ± 7.2 years, 172.9 ± 9.2 cm, 83.2 ± 17.0 kg) with HIFT experience (≥2 years) volunteered for this cross-over design, placebo-controlled study. P</span>articipants completed four consecutive weekly experimental visits at approximately the same time and day in randomized order. Upon arrival, they consumed either a pre-workout supplement (S, Shifted® Maximum Pre-workout Formula) containing ingredients known to improve energy availability and manage fatigue, or a placebo (P) of similar caloric content, and then rested 40 minutes before completing either a 5- or 15-minute AMRAP of 9-calorie rowing, six barbell thrusters (43.1 kg), and three 0.61m box jumps. Performance was quantified on the rower (strokes completed and power [PRow]) via ergometer microcomputer, thruster barbell velocity (VTHR) and power (PTHR) via 3D motion tracking system, and box jump peak force (FBJ) and rate of force development by in-ground force plates on each repetition. Subsequently, their average, standard deviation (SD), and slope was calculated across each round completed.

Results: Separate repeated measures analysis of variance with Greenhouse Geiser adjustments revealed significant differences (p < 0.05) existed across trials for repetitions completed, total rowing strokes, average PROW, PTHR slope, and FBJ slope. Bonferonni post-hoc analysis revealed expected differences between workout durations for repetitions completed (15-min = 182 - 186 repetitions; 5-min = 78 - 81 repetitions, p < 0.001), total rowing strokes (15-min = 142 - 162 strokes; 5-min = 58 - 59 strokes, p < 0.001), and average PRow (15-min = 184 - 214 W; 5-min = 308 - 323 W, p < 0.05). Interestingly, average rowing strokes were significantly different and more variable between 15-min P and 5-min P (p < 0.001) but not between S-trials, though FBJ slope was steeper during 5-min with S (slope = -83 ± 39 N/round) compared to both 15-minute workouts (slope = -13 to +6 N/round). No other significant differences were observed.

Conclusion: Aside from more consistent rowing, the multi-ingredient pre-workout supplement did not affect AMRAP performance, regardless of duration. PRACTICAL APPLICATIONS: The data does not support consuming this multi-ingredient pre-workout supplement to better maintain power throughout a 5-minute or 15-minute HIFT AMRAP in experienced men. 

Acknowledgements: This study was funded through Shifted LLC, Eugene, OR, USA.