Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity
The aim of this study was to determine the effects of serial ingestion of carbohydrate-electrolyte beverages and a flavored water placebo (P) on physiological function during cycling performance in the heat and high humidity. Ten subjects participated in the experiment.In exercise experiment the sub...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
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1999
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| Online Access: | http://eprints.usm.my/42357/1/GP...Kajian_Pemberian_Supliment_Karbohidrat_Berektrolit_Dan_Air_%28Placebo%29_Atas_Prestasi_Berbasikal_Dalam_Suasana_Haba_Dan_Lembab_Tinggi..OCR...pdf |
| _version_ | 1825834604907462656 |
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| author | Singh, Rabindarjeet Sirisinghe, Roland G Mat, Ishak Nor, Norazmi Mohd |
| author_facet | Singh, Rabindarjeet Sirisinghe, Roland G Mat, Ishak Nor, Norazmi Mohd |
| author_sort | Singh, Rabindarjeet |
| collection | USM |
| description | The aim of this study was to determine the effects of serial ingestion of carbohydrate-electrolyte beverages and a flavored water placebo (P) on physiological function during cycling performance in the heat and high humidity. Ten subjects participated in the experiment.In exercise experiment the subjects rode at 66.7±1.7% of maximal oxygen consumption to exhaustion in a room maintained at 31 .1 ±0.1 and 91.2±0.9% relative humidity on three separate
occasions. During the rest and exercise bout the subjects consumed 3 mi. kg body weight-1 of P,a 6% carbohydrate-electrolyte (MC) or 12% carbohydrate-electrolyte (HC) beverage every 20 minutes. Beverage were administered in double blind, counterbalanced order.In the exercise experiment the total time to exhaustion was significantly longer for HC (84.7±6.9 min: P<0.001) and MC (75.3±3.5 min; P<0.01) compared to P (66.2±2.2 min).Compared to P, ingestion of the carbohydrate-electrolyte beverages resulted in higher glucose and insulin concentrations throughout the exercise with no significant differences in RER values.Markers of physiologic function and sensory perception changed similarly throughout exercise; no differences were observed among subjects in response to beverage treatment for changes in oxygen uptake, rectal and skin temperatures, heart rate, sweat rate, in plasma concentrations of lactate, sodium, potassium, ammonia, growth hormone, cortisol, creatine kinase, or for indices of gastrointestinal distress, perceived thirst, and overall beverage acceptance. Rating of perceived exertion, free fatty acids and glycerol levels at exhaustion were significantly higher in p trial. Although there was no significant difference in plasma volumes, it however
resulted in a smaller change in MC during exercise in the heat and high humidity. Compare to ingestion of a water placebo, consumption of beverage contain 6% (MC) and 12%
(HC) carbohydrate-electrolyte resulted in similar physiologic and sensory response, whilst ingestion
of 12% carbohydrate-electrolyte beverage resulted in a longer exercise time to exhaustion in the heat and high humidity. |
| first_indexed | 2024-03-06T15:25:13Z |
| format | Conference or Workshop Item |
| id | usm.eprints-42357 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:25:13Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | usm.eprints-423572020-03-20T04:29:35Z http://eprints.usm.my/42357/ Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity Singh, Rabindarjeet Sirisinghe, Roland G Mat, Ishak Nor, Norazmi Mohd RC1200 Sports Medicine The aim of this study was to determine the effects of serial ingestion of carbohydrate-electrolyte beverages and a flavored water placebo (P) on physiological function during cycling performance in the heat and high humidity. Ten subjects participated in the experiment.In exercise experiment the subjects rode at 66.7±1.7% of maximal oxygen consumption to exhaustion in a room maintained at 31 .1 ±0.1 and 91.2±0.9% relative humidity on three separate occasions. During the rest and exercise bout the subjects consumed 3 mi. kg body weight-1 of P,a 6% carbohydrate-electrolyte (MC) or 12% carbohydrate-electrolyte (HC) beverage every 20 minutes. Beverage were administered in double blind, counterbalanced order.In the exercise experiment the total time to exhaustion was significantly longer for HC (84.7±6.9 min: P<0.001) and MC (75.3±3.5 min; P<0.01) compared to P (66.2±2.2 min).Compared to P, ingestion of the carbohydrate-electrolyte beverages resulted in higher glucose and insulin concentrations throughout the exercise with no significant differences in RER values.Markers of physiologic function and sensory perception changed similarly throughout exercise; no differences were observed among subjects in response to beverage treatment for changes in oxygen uptake, rectal and skin temperatures, heart rate, sweat rate, in plasma concentrations of lactate, sodium, potassium, ammonia, growth hormone, cortisol, creatine kinase, or for indices of gastrointestinal distress, perceived thirst, and overall beverage acceptance. Rating of perceived exertion, free fatty acids and glycerol levels at exhaustion were significantly higher in p trial. Although there was no significant difference in plasma volumes, it however resulted in a smaller change in MC during exercise in the heat and high humidity. Compare to ingestion of a water placebo, consumption of beverage contain 6% (MC) and 12% (HC) carbohydrate-electrolyte resulted in similar physiologic and sensory response, whilst ingestion of 12% carbohydrate-electrolyte beverage resulted in a longer exercise time to exhaustion in the heat and high humidity. 1999 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.usm.my/42357/1/GP...Kajian_Pemberian_Supliment_Karbohidrat_Berektrolit_Dan_Air_%28Placebo%29_Atas_Prestasi_Berbasikal_Dalam_Suasana_Haba_Dan_Lembab_Tinggi..OCR...pdf Singh, Rabindarjeet and Sirisinghe, Roland G and Mat, Ishak and Nor, Norazmi Mohd (1999) Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity. In: Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity. (Submitted) http://ethesis.usm.my:8080/jspui/handle/123456789/6888 |
| spellingShingle | RC1200 Sports Medicine Singh, Rabindarjeet Sirisinghe, Roland G Mat, Ishak Nor, Norazmi Mohd Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title | Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title_full | Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title_fullStr | Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title_full_unstemmed | Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title_short | Effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| title_sort | effects of carbohydrate supplements and water on physiological parameters during exercise in the heat and humidity |
| topic | RC1200 Sports Medicine |
| url | http://eprints.usm.my/42357/1/GP...Kajian_Pemberian_Supliment_Karbohidrat_Berektrolit_Dan_Air_%28Placebo%29_Atas_Prestasi_Berbasikal_Dalam_Suasana_Haba_Dan_Lembab_Tinggi..OCR...pdf |
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