Supplemental carbohydrate ingestion does not improve performance of high-intensity resistance exercise.
The effects of supplemental carbohydrate (CHO) ingestion on the performance of squats to exhaustion (STE) were investigated with eight resistance-trained men. Subjects participated in a randomized, counterbalanced, double-blind, placebo-controlled protocol with testing separated by 7 days. Subjects consumed 0.3g.kgCHO.bodymass or a placebo (PLC) of equal volume immediately before exercise and after every other successful set of squats. The STE consisted of sets of five repetitions at an intensity of 85% 1 repetition maximum (1RM). Performance measured as total sets (CHO 3.5 +/- 3.2, PLC 3.5 +/- 2.7), repetitions (CHO 20.4 +/-14.9, PLC 19.7 +/- 13.1), volume load (CHO 2928.7 +/- 2219.5 kg, PLC 2772.8 +/- 1951.4 kg), and total work (CHO 29.9 +/- 22.3 kJ, PLC 28.6 +/- 19.5 kJ) was not statistically different between the CHO and PLC treatments. The results suggest that CHO supplementation does not enhance performance of squats performed with 85% 1RM to volitional failure.
Human Performance Laboratory, Midwestern State University, Wichita Falls, Texas, USA.
Justin R
JR
Kulik
Chad D
CD
Touchberry
Naoki
N
Kawamori
Peter A
PA
Blumert
Aaron J
AJ
Crum
G Gregory
GG
Haff
D000328:Adult; D001786:Blood Glucose / Q000032:analysis; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D004311:Double-Blind Method; D005227:Fatty Acids / Q000097:blood; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007552:Isotonic Solutions / Q000008:administration & dosage; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D005082:Physical Exertion / Q000502:physiology
D001786:Blood Glucose; D004040:Dietary Carbohydrates; D005227:Fatty Acids; D007552:Isotonic Solutions; C011259:gatorade; D019344:Lactic Acid