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Matthew P. Martens, Joanna Buscemi, Ashley E. Smith, and James G. Murphy

Background:

Research has shown that many college students do not meet recommended national guidelines for physical activity. The objective of this pilot study was to examine the short-term efficacy of a brief motivational intervention (BMI) designed to increase physical activity.

Methods:

Participants were 70 college students who reported low physical activity (83% women, 60% African American). Participants were randomly assigned to either the BMI condition or to an education-only (EO) condition. They completed measures of physical activity at baseline and 1-month follow-up.

Results:

Those in the BMI condition reported more vigorous-intensity physical activity at a 1-month follow-up than those in the EO condition.

Conclusions:

The findings from this study provide preliminary support for the efficacy of a BMI designed to increase physical activity among college students. Future studies should continue to examine and refine the intervention in an effort to improve health-related behaviors among this group.

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Ashley A. Walter, Abbie E. Smith, Trent J. Herda, Eric D. Ryan, Jordan R. Moon, Joel T. Cramer, and Jeffrey R. Stout

The purpose of this study was to examine the effects of 5 d of creatine (Cr) loading on the electromyographic fatigue threshold (EMG FT) in college-age men. Sixteen men (age 22.4 ± 2.6 yr, height 177.4 ± 6.8 cm, weight 79.5 ± 10.6 kg; M ± SD) participated in this double-blind study and were randomly placed into either placebo (Pl; 10 g of flavored fructose powder per packet; n = 8) or Cr (5 g dicreatine citrate plus 10 g of flavored fructose powder per packet; n = 8) loading groups. Each participant ingested 1 packet 4 times/d, totaling 20 g/d for 5 days (loading). Before and after loading, each participant performed a discontinuous cycle-ergometer test to determine his EMG FT, using bipolar surface electrodes placed on the vastus lateralis of the right thigh. Four 60-s work bouts (ranging from 200 to 400 W) were completed. Adequate rest was given between bouts to allow for the participants’ heart rate (HR) to drop within 10 beats of their resting HR. The EMG amplitude was averaged over 5-s intervals for each 60-s work bout. Resulting slopes from each successive work bout were used to calculate EMG FT. A 2-way ANOVA, Group (Cr vs. Pl) EETime (pre vs. post), resulted in a nonsignificant (p > .05) interaction for supplement and time. In addition, a significant increase (p = .009) in weight was observed in the Cr group. These data suggest that there was a minimal influence of Cr loading on EMG FT for the participants in this study.