Medicine & Science in Sports & Exercise:
F-36 Free Communication/Poster - Supplements III (Creatine, Sodium Bicarbonate, Others): JUNE 3, 2011 1:00 PM - 6:00 PM: ROOM: Hall B
Bemis, Matthew J.; Miles, Mary P. FACSM; Rawson, Eric S. FACSM
1Bloomsburg University, Bloomsburg, PA. 2Montana State University, Bozeman, MT.
(No relationships reported)
PURPOSE: To assess and describe the relationship between dietary creatine, blood creatine, body composition, and physical function.
METHODS: 101 volunteers (20.6 (1.7) yr; 64 M, 37 F) reported to the laboratory on two occasions seven days apart. Body composition was assessed using bio-electrical impedance, 3-RM knee extensor strength was assessed using a Biodex dynamometer at 60, 120, and 180 deg/sec, physical activity was assessed using a questionnaire (MLTA), and a blood sample was obtained for determination of blood creatine. Dietary creatine intake was assessed using a modified Block 2005 Food Frequency Questionnaire. Participants were separated into groups based on dietary creatine intake (Grp A: 1.5 g/d n=6) and body composition, strength, and blood creatine were compared.
RESULTS: Mean dietary creatine intake among the groups was Grp A=0.3 g/d, Grp B=0.7 g/d, Grp C=1.2 g/d, and Grp D=1.8 g/d. Fat free mass was similar between groups: A=58.0, B=58.4, C=63.0, and D=62.7 kg (p=0.65). Total 3-RM strength at all three speeds was similar between groups (all p>0.66). Light, moderate, heavy, and total physical activity were similar between groups (all p>0.25). There was no difference in blood creatine between groups: A=13.0, B=13.0, C=12.2, D=14.0 umol/L.
CONCLUSION: Dietary creatine intake in healthy adults is lower than previously reported, but does not impact body composition, physical function, or blood creatine. Funding: Supported in part by a grant from the BU Foundation