Aggravation of Pulmonary Diffusing Capacity in Highly Trained Athletes by 6 Weeks of Low-Volume, Low-Intensity Training

Abstract : Purpose: Postexercise alveolar-capillary membrane-diffusing capacity (DLco) often decreases in highly trained endurance athletes and seems linked to their training status. To test the hypothesis that training status influences postexercise DLco, 13 male and 2 female triathletes (20.2 ± 4.4 y old, 175.2 ± 6.7 cm tall; weight in a range of 66.6 ± 7.4 kg to 67.4 ± 7.8 kg during the 1-y study) were randomized into experimental (n = 7) and control (n = 8) groups and performed VO2max cycle tests and simulated cycle-run successions (CR) of 30 min + 20 min after 3 periods in the competitive season. Methods: Both groups were tested before (pre- HTP) and after a 30-wk high-training period (HTP) with high training volume, intensity, and frequency. The experimental group was then also tested after a 6-wk low-training period (LTP) with low training volume, intensity, and frequency, while the control group continued training according to the HTP schedule for these 6 wk. Ventilatory data were collected continuously. DLco testing was performed before and 30, 60, and 120 min after the CR trials. Results: Whatever the period or group, DLco was significantly decreased 30 min after CR, with a significantly greater decrease in the experimental group than the control group in LTP (–15.7% and –9.3% of DLco, respectively). Conclusions: Six weeks of low training volume and intensity were sufficient to reverse the effects of high training volume and intensity on the alveolar-capillary membrane after a CR succession in competitive triathletes.
Keywords : DLco exercise triathlon
Type de document :
Article dans une revue
International Journal of Sports Physiology and Performance, Human Kinetics, 2013, 8 (6), pp.648-662
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Soumis le : vendredi 12 juin 2015 - 19:09:29
Dernière modification le : vendredi 13 avril 2018 - 16:16:01

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Olivier Galy, Laurent Maimoun, Olivier Coste, Jérôme Manetta, Alain Boussana, et al.. Aggravation of Pulmonary Diffusing Capacity in Highly Trained Athletes by 6 Weeks of Low-Volume, Low-Intensity Training. International Journal of Sports Physiology and Performance, Human Kinetics, 2013, 8 (6), pp.648-662. 〈hal-01163434〉

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