Higgins, M., James, R. S. and Price, M. (2013) The effects of sodium bicarbonate (NaHCO3) ingestion on high intensity cycling capacity. Journal of Sports Sciences. 31(9), pp. 972-981. 0264-0414.
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Abstract:
Ten healthy, non-cycling trained males (age: 21.2+2.2 years, body mass: 75.9+13.4 kg, height: 178+6 cm, _V O2PEAK:
46+10 ml kg(-1) min(-1)) performed a graded incremental exercise test, two familiarisation trials and six experimental trials. Experimental trials consisted of cycling to volitional exhaustion at 100%, 110% and 120% WPEAK, 60min after ingesting either 0.3 g kg(-1) body mass sodium bicarbonate (NaHCO3) or 0.1 g kg(-1) body mass sodium chloride (placebo). NaHCO3 ingestion increased cycling capacity by 17% at 100% WPEAK (327 vs. 383 s; P=0.02) although not at 110% WPEAK (249 vs. 254 s; P=0.66) or 120% WPEAK (170 vs. 175 s; P=0.60; placebo and NaHCO3 respectively). Heart rate (P=0.02), blood lactate (P=0.001), pH (P<0.001), [HCO3 (-)], (P<0.001), and base excess (P<0.001) were greater in all NaHCO3 trials. NaHCO3 attenuated localised ratings of perceived exertion (RPEL) to a greater extent than placebo only at 100% WPEAK (P<0.02). Ratings of abdominal discomfort and gut fullness were mild but higher for NaHCO3. NaHCO3 ingestion significantly improves continuous constant load cycling at 100% WPEAK due to, in part, attenuation of RPEL.
Uncontrolled Keywords:
Ergogenic aids, alkalosis, metabolic buffers, pH, RPE
Subjects:
Creators:
Higgins, M., James, R. S. and Price, M.
Publisher:
Taylor & Francis
Northamptonshire and East Midlands:
Health
Faculties, Divisions and Institutes:
Date:
2013
Date Type:
Publication
Page Range:
pp. 972-981
Journal or Publication Title:
Journal of Sports Sciences
Volume:
31
Number:
9
Language:
English
ISSN:
0264-0414
Status:
Published / Disseminated
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