Apunts Medicina de l'Esport (English Edition) Apunts Medicina de l'Esport (English Edition)
Apunts Med Esport. 2012;47:23-9 - Vol. 47 Num.173 DOI: 10.1016/j.apunts.2011.07.003

Changes in heart rate recovery index after a programme of strength/endurance training in hypoxia

Jesús Álvarez-Herms a, Sonia Julià-Sánchez a, Francisco Corbi b, Teresa Pagès a, Ginés Viscor c,

a Departamento de Fisiología e Inmunología, Facultad de Biologia, Universidad de Barcelona, Barcelona, Spain
b Instituto Nacional de Educación Física de Catalunya (INEFC), Centro de Lleida - Universidad de Lleida (UdL), Lleida, Spain
c Departament de Fisiologia i Immunologia, Universitat de Barcelona, Barcelona, Spain

Keywords

Hypoxia. Heart rate. Strength training.

Abstract

Objective

To determine whether twelve sessions of resistance training on lower limbs at simulated altitude (2500m) were efficient to elicit an improvement in heart rate recovery index in the first 3min of recovery after a maximal jump test.

Materials and methods

Twelve young physically active subjects were divided in two balanced groups for training in hypoxia (HYP) and normal oxygen (NOR). The subjects were assigned to each group based on previous test results in the 60s counter-movement jump test (CMJ60).

Results

Both groups performed identical strength training (volume, intensity, character and effort conditions) on the lower limbs (squats, half-squats and jumps) for 4 weeks. Both groups improved the measured parameters in all cases. We analyzed the time course of heart rate during the CMJ60 test and the subsequent 3min recovery period. HYP group (n=5) improved the heart rate recovery index as compared to NOR group (Student's t-test) at minute 2 (P=0.03) and minute 3 (P=0.05).

Conclusions

We conclude that a protocol of resistance training on lower limbs (12 sessions in 4 weeks) at a simulated altitude could improve heart rate recovery index compared to the same training performed at sea level.