TY - JOUR
T1 - Sodium bicarbonate ingestion and repeated swim sprint performance
AU - Siegler, J.C.
AU - Gleadall-Siddall, D.O.
N1 - Free access
PY - 2010
Y1 - 2010
N2 - Siegler, JC and Gleadall-Siddall, D0. Sodium bicarbonate ingestion and repeated swim sprint performance. J Strength Cond Res 24(11): 3105-3111, 2010-The purpose of the present investigation was to observe the ergogenic potential of 0.3 g·kg−1 of sodium bicarbonate (NaHCO3) in competitive, nonelite swimmers using a repeated swim sprint design that eliminated the technical component of turning. Six male (181.2 ± 7.2 cm; 80.3 ± 11.9 kg; 50.8 ± 5.5 ml·kg−1·min−1O2max) and 8 female (168.8 ± 5.6 cm; 75.3 ± 10.1 kg; 38.8 ± 2.6 ml·kg−1·min−1O2max) swimmers completed 2 trial conditions (NaHCO3 [BICARB] and NaCl placebo [PLAC]) implemented in a randomized (counterbalanced), single blind manner, each separated by 1 week. Swimmers were paired according to ability and completed 8, 25-m front crawl maximal effort sprints each separated by 5 seconds. Blood acid-base status was assessed preingestion, pre, and postswim via capillary finger sticks, and total swim time was calculated as a performance measure. Total swim time was significantly decreased in the BICARB compared to PLAC condition (p = 0.04), with the BICARB condition resulting in a 2% decrease in total swim time compared to the PLAC condition (159.4 ± 25.4 vs. 163.2 ± 25.6 seconds; mean difference = 4.4 seconds; 95% confidence interval = 8.7-0.1). Blood analysis revealed significantly elevated blood buffering potential preswim (pH: BICARB = 7.48 ± 0.01, PLAC = 7.41 ± 0.01) along with a significant decrease in extracellular K+ (BICARB = 4.0 ± 0.1 mmol·L−1, PLAC = 4.6 ± 0.1 mmol·L−1). The findings suggest that 0.3 g·kg−1 NaHCO3 ingested 2.5 hours before exercise enhances the blood buffering potential and may positively influence swim performance.
AB - Siegler, JC and Gleadall-Siddall, D0. Sodium bicarbonate ingestion and repeated swim sprint performance. J Strength Cond Res 24(11): 3105-3111, 2010-The purpose of the present investigation was to observe the ergogenic potential of 0.3 g·kg−1 of sodium bicarbonate (NaHCO3) in competitive, nonelite swimmers using a repeated swim sprint design that eliminated the technical component of turning. Six male (181.2 ± 7.2 cm; 80.3 ± 11.9 kg; 50.8 ± 5.5 ml·kg−1·min−1O2max) and 8 female (168.8 ± 5.6 cm; 75.3 ± 10.1 kg; 38.8 ± 2.6 ml·kg−1·min−1O2max) swimmers completed 2 trial conditions (NaHCO3 [BICARB] and NaCl placebo [PLAC]) implemented in a randomized (counterbalanced), single blind manner, each separated by 1 week. Swimmers were paired according to ability and completed 8, 25-m front crawl maximal effort sprints each separated by 5 seconds. Blood acid-base status was assessed preingestion, pre, and postswim via capillary finger sticks, and total swim time was calculated as a performance measure. Total swim time was significantly decreased in the BICARB compared to PLAC condition (p = 0.04), with the BICARB condition resulting in a 2% decrease in total swim time compared to the PLAC condition (159.4 ± 25.4 vs. 163.2 ± 25.6 seconds; mean difference = 4.4 seconds; 95% confidence interval = 8.7-0.1). Blood analysis revealed significantly elevated blood buffering potential preswim (pH: BICARB = 7.48 ± 0.01, PLAC = 7.41 ± 0.01) along with a significant decrease in extracellular K+ (BICARB = 4.0 ± 0.1 mmol·L−1, PLAC = 4.6 ± 0.1 mmol·L−1). The findings suggest that 0.3 g·kg−1 NaHCO3 ingested 2.5 hours before exercise enhances the blood buffering potential and may positively influence swim performance.
KW - metabolic alkalosis
KW - ergogenic aid
KW - buffering potential
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-79952202586&partnerID=MN8TOARS
UR - https://journals.lww.com/nsca-jscr/Fulltext/2010/11000/Sodium_Bicarbonate_Ingestion_and_Repeated_Swim.29.aspx
U2 - 10.1519/JSC.0b013e3181f55eb1
DO - 10.1519/JSC.0b013e3181f55eb1
M3 - Article
SN - 1064-8011
VL - 24
SP - 3105
EP - 3111
JO - Journal of Strength and Conditioning Research
JF - Journal of Strength and Conditioning Research
IS - 11
ER -