Effect of induced alkalosis on performance during a field-simulated BMX cycling competition
| Autor: | Francisco J. Calderón, Daniel Sanabria, Ana B. Peinado, Antonio Luque-Casado, C. Gonzalez, Darías Holgado, Miguel A. Rojo-Tirado, Mikel Zabala, Manuel Mateo-March, Cristóbal Sánchez-Muñoz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Male
Alkalosis Adolescent Medicina Physical Therapy Sports Therapy and Rehabilitation Athletic Performance Placebo 03 medical and health sciences chemistry.chemical_compound Young Adult 0302 clinical medicine Animal science Double-Blind Method Heart Rate Ingestion Medicine Heart rate variability Humans Orthopedics and Sports Medicine 030212 general & internal medicine Lactic Acid Acidosis Deportes Sodium bicarbonate Cross-Over Studies business.industry Cardiorespiratory fitness 030229 sport sciences Hydrogen-Ion Concentration medicine.disease Bicycling Sodium Bicarbonate chemistry Base excess medicine.symptom business |
| Zdroj: | Journal of Science and Medicine in Sport, ISSN 1440-2440, 2019, Vol. 22, No. 3 Archivo Digital UPM Universidad Politécnica de Madrid |
| Popis: | Objectives: The aim of the present study was to test the effect of sodium bicarbonate (NaHCO3-) ingestion on performance during a simulated competition on a Bicycle Motocross (BMX) track. Design: Double-blind cross-over study. Methods: Twelve elite male BMX cyclists (age: 19.2±3.4 years; height: 174.2±5.3cm; body mass: 72.4±8.4kg) ingested either NaHCO3- (0.3g.kg-1 body weight) or placebo 90min prior to exercise. The cyclists completed three races in a BMX Olympic track interspersed with 15min of recovery. Blood samples were collected to assess the blood acid-base status. Performance, cardiorespiratory, heart rate variability (HRV) as well as subjective variables were assessed. Results: The main effect of condition (NaHCO3- vs. placebo) was observed in pH, bicarbonate concentration and base excess (p0.05). The HRV analysis showed a significant effect of NaHCO3- ingestion, expressed by the rMSSD30 (root mean square of the successive differences) (p0.05). Finally, there was no effect of condition for any subjective scale (p>0.05). Conclusions: We present here the first field condition study to investigate the effect of bicarbonate ingestion over performance in BMX discipline. The results showed that NaHCO3--induced alkalosis did not improve performance in a simulated BMX competition in elite BMX cyclists, although future studies should consider the effects of NaHCO3- on autonomic function as a component of recovery. |
| Databáze: | OpenAIRE |
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