COMBINED EFFECTS OF PROLONGED CREATINE SUPPLEMENTATION AND RESISTANCE TRAINING ON MUSCULAR STRENGTH AND BODY COMPOSITION IN COLLEGIATE

Abstract

Abstract The purpose of this investigation wasto examine the effects of 6 wk of oral creatine supplementation during aperiodized program of strength training on arm flexor, bench press and squat1RM, and body composition. Eighteen collegeathletes volunteers with at least 1 year of weight training experience randomlyassigned to two groups of creatine(Cr, n=9) and placebo(P, n=9) with nosignificant mean at pretest measures. Cr group received 20 g.d-1 ofcreatine for the first 6 d in 5-g doses, four times daily, followed by 5 g.d-1for reminder of the study. Each 5-g dose was mixed with 500 mL of glucosesolution. The P group received a placebo (starched, sucrose drink) followingthe exact protocol as the Cr group. All subjects’ resistance trained 3 d.Wk-1.Measurement of 1RM strength of arm flexors,bench press, and squat and body composition were made pre- and post-trainingafter supplementation while monitoring dietary intakes. Results showed bodymass and lean tissue mass increased to a greater extent with training in Crcompared to placebo group (p< 0.05). There were no significant changes inpercent body fat for either group. Cr group demonstrated greater improvement in1RM of squat, bench press and arm flexors than placebo group. These datasuggest that creatine supplementation during strength training may be superiorto training alone for enhancing muscular strength and body composition.

Keywords

• ergogenic aids
• weight training
• creatine monohydrate

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