ACUTE EFFECTS OF A CAFFEINE-CONTAINING SUPPLEMENT ON BENCH PRESS AND LEG EXTENSION STRENGTH AND TIME TO EXHAUSTION DURING CYCLE ERGOMETRY

作者：Hendrix C Russell^*; Housh Terry J; Mielke Michelle; Zuniga Jorge M; Camic Clayton L; Johnson Glen O; Schmidt Richard J; Housh Dona J

来源：Journal of Strength and Conditioning Research, 2010, 24(3): 859-865.

DOI：10.1519/JSC.0b013e3181ae7976

• endurance

Hendrix, CR, Housh, TJ, Mielke, M, Zuniga, JM, Camic, CL, Johnson, GO, Schmidt, RJ, and Housh, DJ. Acute effects of a caffeine-containing supplement on bench press and leg extension strength and time to exhaustion during cycle ergometry. J Strength Cond Res 24(3): 859-865, 2010-The purpose of the present study was to examine the acute effects of a caffeine-containing supplement (SUPP) on 1 repetition maximum (1RM) bench press and leg extension strength, as well as time to exhaustion (TTE), during cycle ergometry at a power output that corresponded to 80% Of (V) over dotO(2)peak. The study used a double-blinded, placebo-controlled, crossover design. Twenty-one untrained men (mean +/- SD age = 23.0 +/- 2.6 yr) were randomly assigned to take either the SUPP or placebo PLAC) first. The SUPP contained 400 mg of caffeine, 66.7 mg of capsicum extract, 10 mg of bioperine, and 40 mg of niacin, and the PLAC was microcrystalline cellulose. Sixty minutes after taking either the SUPP or PLAC, the subjects were tested for 1RM bench press and leg extension strength, as well as TTE. After 1 week of rest, the subjects ingested the opposite substance (SUPP or PLAC) and were retested for 1RM bench press and leg extension strength, as well as TTE. The results indicated that the SUPP had no effect on 1RM bench press strength, 1RM leg extension strength, or TTE at 80% (V) over dotO(2)peak. These findings did not support the use of the caffeine-containing SUPP in the present study as an ergogenic aid in untrained individuals.

• 出版日期2010-3