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Respuestas fisiológicas, de rendimiento y de estrés oxidativo al entrenamiento de intervalos de alta intensidad

George Theofilidis¹, Gregory C Bogdanis², Antonia Kaltsatou¹

¹Experimental Physiology & Myology and Lifestyle Medicine Laboratory, CREHP, DPESS, School of Physical Education Sports Science and Nutrition, University of Thessaly, Karyes, 42100 Trikala, Greece.

Journal of functional morphology and kinesiology

|December 24, 2025

Resumen

El entrenamiento de intervalos de alta intensidad en diferentes pendientes afecta el rendimiento aeróbico. Correr cuesta arriba mejora la tolerancia al lactato, mientras que correr cuesta abajo mejora la economía de carrera y la velocidad aeróbica máxima.

Área de la Ciencia:

Exercise Physiology
Sports Science
Biochemistry

Sus antecedentes:

Interval training is a popular method for improving aerobic performance.
The effects of incline on training adaptations are not fully understood.
Oxidative stress markers may be influenced by exercise intensity and duration.

Objetivo del estudio:

To investigate the impact of opposing running slopes on aerobic performance and redox determinants.
To compare the effects of uphill versus downhill interval training.
To assess changes in maximal oxygen uptake, running economy, and oxidative stress markers.

Principales métodos:

Fourteen volunteers completed 8 weeks of high-intensity interval training (HIIT) on either a +10% (uphill) or -10% (downhill) grade.
Training involved ten 30-second runs at 90% of maximal aerobic speed (MAS) with a 1:2 work-to-rest ratio.
Evaluated parameters included VO2max, MAS, running economy, time to exhaustion, blood lactate, and redox markers (TAC, PCs).

Principales resultados:

VO2max remained unchanged in both groups.
Maximal aerobic speed (MAS) increased in the downhill group.
Uphill interval training led to increased blood lactate levels, suggesting enhanced tolerance, while downhill training showed improvements in running economy.

Conclusiones:

Both uphill and downhill interval training maintained VO2max levels.
Uphill HIIT may enhance lactate tolerance, while downhill intermittent running may improve running economy.
Divergent changes in metabolic, redox, and performance indicators were observed between the two training modalities.

Palabras clave:

estado REDOX correr cuesta abajo determinantes del rendimiento de resistencia entrenamiento de intervalos correr cuesta arriba

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