D-29 Free Communication/Poster - Macronutrient Metabolism I - Protein and Amino Acids: JUNE 2, 2011 1: 00 PM - 6: 00 PM: ROOM: Hall B
The Effects of Fat-Free vs. Fat-Containing Chocolate Milk Ingestion on Performance Characteristics in Collegiate Softball Players
Board #95 June 2 2:00 PM - 3:30 PM
Campbell, Bill I.; Myers, Breanna; Forsyth, Ashley; Parker, Brittany; Gomez, Brittany; Elkins, Ava; Marcello, Brandon; Wilborn, Colin; La Bounty, Paul; Kreider, Richard FACSM
1University of South Florida, Tampa, FL. 2Stanford University, Stanford, CA. 3University of Mary-Hardin Baylor, Belton, TX. 4Baylor University, Waco, TX. 5Texas A&M University, College Station, TX.
(No relationships reported)
PURPOSE: To determine the effects of ingesting two forms of chocolate milk (fat free vs. fat containing) immediately after resistance exercise over an 8-week period to determine its effects on exercise performance.
METHODS: In a double-blinded manner, 18 collegiate softball players (18.5 ± 0.7 yrs; 166.9 ± 4.6 cm; 156.2 ± 21.6 kg) were randomized according to strength & bodyweight to ingest a fat free (300 kcals, 58g carbohydrate, 16g protein, 0g fat) or a fat-containing (380 kcals, 58g carbohydrate, 16g protein, 10g fat) chocolate milk beverage. The chocolate milk (Nestle Nesquik®) was ingested in a 16 ounce bottle & occurred immediately following all periodized resistance exercise training sessions for a duration of 8-weeks. Dependent variables included the vertical jump test, 20-yard sprint, & the agility t-test and were assessed at baseline & following 8-weeks of a periodized resistance training program. Dependent variables were assessed via a 2×2 repeated measures analysis of variance (ANOVA) using PASW Statistics 18.
RESULTS: Data are reported as means ± sd. No significant differences existed between the groups at baseline in relation to caloric intake & performance variables. Vertical jump performance at baseline and post-testing for the fat-free group was 14.5 ± 2.2 and 15.6 ± 2.2 inches. For the fat-containing group, vertical jump at baseline and post-testing was 14.75 ± 1.6 and 15.0 ± 1.5 inches. There was no significant difference between the groups (p = 0.206). 20-yard sprint performance at baseline and post-testing for the fat-free group was 3.16 ± 0.21 and 2.95 ± 0.20 seconds. For the fat-containing group, 20-yard sprint time at baseline and post-testing was 3.09 ± 0.16 and 2.95 ± 0.11 inches. There was no significant difference between the groups (p = 0.270). Agility t-test performance at baseline and post-testing for the fat-free group was 12.31 ± 0.81 and 12.08 ± 0.83 seconds. For the fat-containing group, agility t-test performance at baseline and post-testing was 12.19 ± 0.91 and 11.98 ± 0.84 seconds. There was no significant difference between the groups (p = 0.899). CONCLUSION: The fat content of chocolate milk (5 grams per serving or 10 total grams), as compared to fat-free chocolate milk, ingested immediately following resistance exercise over an 8-week period does not have an effect on exercise performance. © 2011 American College of Sports Medicine View full article text