TY - JOUR
T1 - Acute effects of a caffeine-containing supplement on bench press and leg extension strength and time to exhaustion during cycle ergometry
AU - Hendrix, C. Russell
AU - Housh, Terry J.
AU - Mielke, Michelle
AU - Zuniga, Jorge M.
AU - Camic, Clayton L.
AU - Johnson, Glen O.
AU - Schmidt, Richard J.
AU - Housh, Dona J.
PY - 2010/3
Y1 - 2010/3
N2 - 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 VO2peak. The study used a double-blinded, placebo-controlled, crossover design. Twentyone 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% VO2peak. These findings did not support the use of the caffeinecontaining SUPP in the present study as an ergogenic aid in untrained individuals.
AB - 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 VO2peak. The study used a double-blinded, placebo-controlled, crossover design. Twentyone 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% VO2peak. These findings did not support the use of the caffeinecontaining SUPP in the present study as an ergogenic aid in untrained individuals.
KW - Endurance
UR - http://www.scopus.com/inward/record.url?scp=77950608383&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77950608383&partnerID=8YFLogxK
U2 - 10.1519/JSC.0b013e3181ae7976
DO - 10.1519/JSC.0b013e3181ae7976
M3 - Article
C2 - 19834348
AN - SCOPUS:77950608383
SN - 1064-8011
VL - 24
SP - 859
EP - 865
JO - Journal of strength and conditioning research
JF - Journal of strength and conditioning research
IS - 3
ER -