caa a22 4500 467942056 CHVBK 20180406153015.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s00421-006-0174-0 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0174-0 Seasonal training and heart rate and blood pressure variabilities in young swimmers [Elektronische Daten] [Renza Perini, Adelaide Tironi, Michela Cautero, Antonio Di Nino, Enrico Tam, Carlo Capelli] To evaluate if changes in athletes' physical fitness due to seasonal training are associated with changes in cardiovascular autonomic control, nine swimmers (three males and six females; aged 14-18years) were evaluated before and after 5months of training and competitions. Maximal oxygen consumption $$(\dot {V} \hbox{O}_{2\max})$$ and ventilatory threshold were determined during a maximal test; heart rate (HR) and blood pressure (BP) variabilities' power spectra were calculated at rest (supine and sitting positions) and in the recovery of two exercises at 25 and 80% pre-training $$\dot {V} \hbox{O}_{2\max}.$$ At the end of the season: (a) $$\dot {V} \hbox{O}_{2\max}$$ and ventilatory threshold increased respectively by 12 and 34% (P<0.05); (b) at rest, HR decreased by 9bmin−1 in both body positions, whereas BP decreased in supine position only by 17%. No change in low frequency (LF, 0.04-0.15Hz) and high frequency (HF, 0.15-1.5Hz) normalized powers and in LF/HF ratio of HR variability and in LF power of systolic BP variability was observed. In contrast, a significant increase in HF α-index (about 12msmmHg−1) was found; (c) during recovery no change in any parameter was observed. Seasonal training improved exercise capacity and decreased resting cardiovascular parameters, but did not modify vagal and sympathetic spectral markers. The increase in α-index observed at rest after the season and expression of augmented baroreflex sensibility indicated however that HR vagal control could have been enhanced by seasonal training. These findings suggested that autonomic system might have played a role in short-term adaptation to training. Springer-Verlag, 2006 Autonomic nervous system nationallicence Athletes nationallicence Spectral analysis nationallicence Baroreceptors nationallicence Physical fitness nationallicence Perini Renza Dipartimento di Scienze Biomediche e Biotecnologie, Università di Brescia, viale Europa 11, 25123, Brescia, Italy aut Tironi Adelaide Dipartimento di Scienze Biomediche e Biotecnologie, Università di Brescia, viale Europa 11, 25123, Brescia, Italy aut Cautero Michela Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut Di Nino Antonio Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut Tam Enrico Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut Capelli Carlo Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut European Journal of Applied Physiology Springer-Verlag 97/4(2006-07-01), 395-403 1439-6319 97:4<395 2006 97 421 https://doi.org/10.1007/s00421-006-0174-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0174-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Perini Renza Dipartimento di Scienze Biomediche e Biotecnologie, Università di Brescia, viale Europa 11, 25123, Brescia, Italy aut NATIONALLICENCE 700 1- Tironi Adelaide Dipartimento di Scienze Biomediche e Biotecnologie, Università di Brescia, viale Europa 11, 25123, Brescia, Italy aut NATIONALLICENCE 700 1- Cautero Michela Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut NATIONALLICENCE 700 1- Di Nino Antonio Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut NATIONALLICENCE 700 1- Tam Enrico Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut NATIONALLICENCE 700 1- Capelli Carlo Dipartimento di Scienze e Tecnologie Biomediche, Università di Udine, Udine, Italy aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/4(2006-07-01), 395-403 1439-6319 97:4<395 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer