Document Detail

The effects of sodium bicarbonate (NaHCO(3)) ingestion on high intensity cycling capacity.
MedLine Citation:
PMID:  23323673     Owner:  NLM     Status:  Publisher    
Abstract Ten healthy, non-cycling trained males (age: 21.2 ± 2.2 years, body mass: 75.9 ± 13.4 kg, height: 178 ± 6 cm, [Vdot]O(2PEAK): 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% W(PEAK), 60 min after ingesting either 0.3 g · kg(-1) body mass sodium bicarbonate (NaHCO(3)) or 0.1 g · kg(-1) body mass sodium chloride (placebo). NaHCO(3) ingestion increased cycling capacity by 17% at 100% W(PEAK) (327 vs. 383 s; P = 0.02) although not at 110% W(PEAK) (249 vs. 254 s; P = 0.66) or 120% W(PEAK) (170 vs. 175 s; P = 0.60; placebo and NaHCO(3) respectively). Heart rate (P = 0.02), blood lactate (P = 0.001), pH (P < 0.001), [HCO(3) (-)], (P < 0.001), and base excess (P < 0.001) were greater in all NaHCO(3) trials. NaHCO(3) attenuated localised ratings of perceived exertion (RPE(L)) to a greater extent than placebo only at 100% W(PEAK) (P < 0.02). Ratings of abdominal discomfort and gut fullness were mild but higher for NaHCO(3). NaHCO(3) ingestion significantly improves continuous constant load cycling at 100% W(PEAK) due to, in part, attenuation of RPE(L).
Matthew F Higgins; Rob S James; Mike J Price
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-16
Journal Detail:
Title:  Journal of sports sciences     Volume:  -     ISSN:  1466-447X     ISO Abbreviation:  J Sports Sci     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405364     Medline TA:  J Sports Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
a Coventry University, Biomolecular and Sports Science , James Starley Building, Cox St, Coventry, CV15FG , United Kingdom.
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