THE EFFECTS OF INTERMITTENT HYPOXIC TRAINING ON AEROBIC CAPACITY AND ENDURANCE PERFORMANCE IN CYCLISTS

The aim of the present study was to evaluate the efficacy of
intermittent hypoxic training (IHT) with 95 % of lactate threshold
workload (WRLT) on aerobic capacity and endurance performance
in well-trained cyclists. Twenty male elite cyclists,
randomly divided into a hypoxia (H) group (n=10; age 22 ±
2.7years; VO2max 67.8 ± 2.5 ml·kg-1·min-1; body height (BH)
1.78 ± 0.05 m; body mass (BM) 66.7 ± 5.4kg; fat free mass
(FFM) 59.3 ± 5.1kg; fat content (FAT%) 11.3 ± 2.1%), and a
control (C) group (n = 10; age 23.5 ± 3.5years; VO2max 67.7 ±
2.0 ml·kg-1·min-1; BH 1.79 ± 3.2 m; BM 69.2 ± 5.5 kg; FFM
63.6 ± 4.8 kg; FAT% 7.9 ± 1.94 %) took part in the research
project. The training program used during the experiment was
the same for the both groups. For three weeks, the subjects in H
group performed 3 training sessions per week in normobaric
hypoxia environment (IHT – O2 = 15.2%). During the elemental
core of the IHT session, the intensity was set at 95% WRLT for
30-min in 1st microcycle, 35-min in 2nd microcycle and 40-min
in 3rd microcycle. The same training procedure was provided in
C group, yet the intensity of the main sessions were set at 100%
WRLT in the normoxia environment. The results indicate a significant
(p < 0.05) increase in VO2max,VO2LT, WRmax, WRLT and
change in lactate concentration (ΔLA) during incremental test in
H group. Also a significant (p < 0.05) decrease in time of the
time trial was seen, associated with a significant increase (p <
0.05) in average generated power (Pavg) and average speed (Vavg)
during the time trial. The intermittent hypoxic training (IHT)
applied in this research did not significantly affect the hematological
variables considered: number of erythrocytes (RBC),
hemoglobin concentration (HGB) and haematocrit value (HCT).
Significant blood value increases (p < 0.05) were only observed
in MCV in H group. This data suggests that intermittent hypoxic
training at lactate threshold intensity and medium duration (30-
40min) is an effective training means for improving aerobic
capacity and endurance performance at sea level.

http://www.jssm.org/vol10/n1/24/v10n1-24abst.php

This entry was posted in Equine training, Mountaineering, Sports, Wellbeing and tagged , , , , . Bookmark the permalink.