Speed and heart rate variation during marathon running in a hot environment

  1. Daniel Rojas-Valverde 1
  2. Braulio Sánchez-Ureña 1
  3. Alexis Ugalde-Ramírez 1
  4. Carlos D Gómez-Carmona 2
  5. José Pino-Ortega 2
  6. Randall Gutiérrez-Vargas 1
  1. 1 Universidad Nacional de Costa Rica, Costa Rica
  2. 2 Universidad de Extremadura, España
Journal:
Pensar en Movimiento: Revista de Ciencias del Ejercicio y la Salud

ISSN: 1659-4436,  1409-0724

Year of publication: 2020

Volume: 18

Issue: 1

Type: Article

DOI: 10.15517/PENSARMOV.V18I1.37602 DIALNET GOOGLE SCHOLAR lock_openDialnet editor

More publications in: Pensar en Movimiento: Revista de Ciencias del Ejercicio y la Salud

Sustainable development goals

Abstract

El objetivo del presente estudio fue analizar la variación de la velocidad de carrera y la frecuencia cardíaca en corredores aficionados durante un maratón en un entorno de alto índice térmico. Dieciocho corredores aficionados (peso: 65.2 ± 12.21 kg, altura: 168.4 ± 10.6 cm, VO2max: 52.9 ± 7.1 ml/kg/min) corrieron un maratón (42195 m) en cercanía al mar bajo un índice térmico de 27.8 ± 3.52 ºC y con recorrido de 0-80 m.s.n.m. La prueba de Pearson mostró una correlación significativa entre el aumento del índice de estrés termal (TGBH) y la variaciónde la velocidad (r= 0.168, p= 0.049). En este sentido, la duración total de la carrera presentó una relación directa con la velocidad (r= 0.675, p= 0.003) y la variación de la frecuencia cardíaca (r= 0.631, p= 0.007). El tiempo final de carrera se explicó en un 61.6% y 37% por la variación de la velocidad de 26 a 30 km (r2= 0.61; F= 26.17; p< 0.001) y por la variabilidad de la frecuencia cardíaca en el lapso de 31 a 35 km (r2= 0.37; F= 10.38; p< 0.001) respectivamente. En conclusión, el índice térmico provoca una disminución en el ritmo de la velocidad, siendo este efecto mayor en la segunda mitad de la carrera. Por lo anterior, entrenadores deben de planificar entrenamientos y estrategias para mitigar el impacto de estas condiciones en el desempeño físico y fisiológico de los corredores amateur.

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