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.
| Item Type: | Article |
|---|---|
| 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: |
Q Science > QP Physiology > QP301 Exercise and sports physiology G Geography. Anthropology. Recreation > GV Recreation. Leisure > GV1040 Cycling. Bicycling. Motorcycling |
| Creators: | Higgins, Matthew, James, R S and Price, M |
| Publisher: | Taylor & Francis |
| Northamptonshire and East Midlands: | Health |
| Faculties, Divisions and Institutes: | University Faculties, Divisions and Research Centres - OLD > Faculty of Health & Society |
| Date: | 2013 |
| Date Type: | Publication |
| Page Range: | pp. 972-981 |
| Journal or Publication Title: | Journal of Sports Sciences |
| Volume: | 31 |
| Number: | 9 |
| Language: | English |
| DOI: | https://doi.org/10.1080/02640414.2012.758868 |
| ISSN: | 0264-0414 |
| Status: | Published / Disseminated |
| Related URLs: | |
| URI: | http://nectar.northampton.ac.uk/id/eprint/5681 |
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