Resumen

Aim: To examine the changes in breathing pattern variables (some indicative of the action of central regulation mechanisms) over a season’s training in top class cyclists. Material and methods: Using a cycloergometer, 10 top class cyclists were subjected to a maximum exercise test in November (preparatory period), February (pre-competition period) and June (competition period). These three moments mark the beginning and end of the two main training periods, during which the volume and intensity of training was recorded. During each test the load (W) and heart rate (HR) were measured at the maximum VO₂ and at each of the ventilatory thresholds. The behaviour of the tidal volume (V_T) and inspiratory time (t_I) were determined over the following V_T/t_I ranges: 1) V_T/t_I <2; 2) V_T/t_I 2-4; and 3) V_T/t_I >4. Results: The volume and intensity of training increased significantly in the second period. However, neither the VO_2max nor the ventilatory thresholds improved. V_T did not change in any of the studied V_T/t_I ranges at any time during the season. The only difference seen was for t_I between the first and second tests when V_T/t_I was <2. The ratio V_T/t_I did not change over the season. Conclusions: Training did not change the variables measured in these highly trained athletes. The changes seen in VO₂ and the ventilatory thresholds after the first test cannot be attributed to changes in the studied breathing pattern variables.

Palabras clave: Breathing pattern training ventilator thresholds V_T/t_I relationship respiratory control.

2011-05-09   |   605 visitas   |   Evalua este artículo 0 valoraciones

Vol. 62 Núm.5. Septiembre-Octubre 2010 Pags. 433-439 Rev Invest Clin 2010; 62(5-ENGLISH)