Matching Items (2)
Description
The popularization of energy drink use as a supplement to exercise is steadily increasing, especially among young adult males. However, the effects of energy drinks on muscular performance in young adults have yet to be clearly elucidated. Eight male subjects (mean age: 23.3 ± 4.3 yrs, height: 181.0 ± 5.3 cm, fat percent 17.8 ± 5.2%, and weight 85.3 ± 12.6 kg) completed this randomized double-blinded cross over study. The purpose of this study was to determine differences in acute muscular strength and endurance and Profile of Mood States (POMS) scores between three treatments (RockStar, sugar-free RockStar, and sugar-free caffeine-free Placebo). It was hypothesized that there would be no significant differences in acute peak torque and endurance of the knee extensors and flexors or on fatigue and vigor subscores from the POMS questionnaire. Each man was tested randomly at least 1 week apart. Diet and time of day were held constant across trials. Peak torque of knee extensors and flexors at 60, 180, 240 degress/second and fatigue index and total work were calculated by performing 50 repetitions at 240 degrees/second. There were no significant differences in peak torque, fatigue index, or total work measures or in subjective measures of fatigue or vigor from the POMS between the treatments. This study indicates that RockStar energy drinks have no acute ergogenic effects in young men performing isokinetic strength or endurance testing.
ContributorsHawley, Michelle (Author) / Swan, Pamela (Thesis advisor) / Campbell, Kathryn (Committee member) / Johnston, Carol (Committee member) / Arizona State University (Publisher)
Created2012
Description
Mood disorders are prevalent within the college student population, increasing the potential for poor academic performance among those students. Intermittent fasting, particularly time-restricted feeding (TRF) regimens, have shown promising results associated with improvements in health outcomes related to weight loss, cardiovascular health, glucose and insulin regulation, and breast cancer; however, very limited research exits for the impact on mood states. The objective of this eight-week randomized, controlled trial was to examine the effects of a daily fasting regimen of 18 hours (six hour feeding window), compared to a daily fasting regimen of eight hours (16 hour feeding window), on the mood state of healthy college students attending Arizona State University or University of Arizona. Twenty nine students were recruited and randomized into the TRF group (n = 16) following a 16-hour fast or the control (CON) group (n = 13) following an eight-hour fast. Participants in each group were instructed to consume their first meal within an hour of waking, which would then begin their assigned feeding window. Participants were also allowed one ‘cheat day’ per week in which they were not required to follow their assigned fasting protocol, otherwise no additional dietary instructions were given; participants were permitted to consume food and beverages ad libitum throughout their feeding window. Mood state was assessed at baseline, week four, and week eight using the Profile of Mood States questionnaire and the GAD-7, specific to generalized anxiety. Of the initial 29 participants recruited, 18 completed the trial (TRF group n = 8; CON group n = 10). Data were reported through week four only, due to inconsistencies with week eight data as a result of the COVID-19 pandemic. The mood state measures did not show any statistically significant changes after four weeks. The results of this study suggest that a TRF regimen of 18 hours does not significantly impact overall or individual mood states among college students.
ContributorsChondropoulos, Kelly Nicole (Author) / Johnston, Carol (Thesis advisor) / Shepard, Tina (Committee member) / Alexon, Christy (Committee member) / Arizona State University (Publisher)
Created2021