title: Noninvasive monitoring of cerebrovascular autoregulation response to resistance exercises.
abstract: BACKGROUND AND OBJECTIVE. A novel noninvasive monitor is presented by demonstrating its capabilities to perform the real-time estimation of dynamics in cerebrovascular autoregulation in athletes during their training. The aim was to explore the characteristics of human cerebrovascular autoregulation by performing the monitoring of cerebrovascular autoregulation responses to resistance exercises in healthy volunteer athletes. MATERIAL AND METHODS. Cerebrovascular autoregulation status was monitored in 20 amateur and 20 elite male athletes (weightlifters and bodybuilders) in the supine position at rest during and after the resistance exercises by using a novel noninvasive monitor "Vittamed." Blood pressure and heart rate were also measured noninvasively. During the exercises, the athletes lifted 50 kg and 80% of 1RM (repetition maximum) weights in a dynamic and static manner in separate tests. RESULTS. The cerebrovascular autoregulation reactivity index showed a temporal improvement in the cerebrovascular autoregulation status for almost all sportsmen after the exercises. No disturbances of cerebrovascular autoregulation response occurred in the weightlifters and amateur athletes after the static and dynamic exercises. However, an unstable status of cerebrovascular autoregulation was observed for the elite bodybuilders during the interval of 400 to 600 s after the exercises. CONCLUSIONS. The data of this study demonstrated significant differences in cerebrovascular autoregulation response to the resistance exercises between the elite bodybuilders and other subjects (amateurs and weightlifters) - a temporarily unstable status of cerebrovascular autoregulation was observed in the group of elite bodybuilders. This study also demonstrated the applicability of the noninvasive device for exploring the physiology of cerebrovascular autoregulation mechanism in elite athletes and healthy volunteers.
authors.affiliation: Studentų 50-450A, 51368 Kaunas, Lithuania. vytautas.petkus@ktu.lt
authors.forename: Vytautas
authors.initials: V
authors.lastname: Petkus
authors.forename: Aurija
authors.initials: A
authors.lastname: Kalasauskienė
authors.forename: Arminas
authors.initials: A
authors.lastname: Ragauskas
authors.forename: Romanas
authors.initials: R
authors.lastname: Chomskis
authors.forename: Gražina
authors.initials: G
authors.lastname: Krutulytė
authors.forename: Laimutis
authors.initials: L
authors.lastname: Kalasauskas
mesh_terms: D000328:Adult; D056352:Athletes; D001921:Brain / Q000098:blood supply*; D006706:Homeostasis; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D005082:Physical Exertion / Q000502:physiology*; D055070:Resistance Training; D055815:Young Adult