TY - JOUR AU - Padulo, J AU - Filingeri, D AU - Chamari, K AU - Migliaccio, GM AU - Calcagno, G AU - Bosco, G AU - Annino, G AU - Tihanyi, József AU - Pizzolato, F TI - Acute effects of whole-body vibration on running gait in marathon runners JF - JOURNAL OF SPORTS SCIENCES J2 - J SPORT SCI VL - 32 PY - 2014 IS - 12 SP - 1120 EP - 1126 PG - 7 SN - 0264-0414 DO - 10.1080/02640414.2014.889840 UR - https://m2.mtmt.hu/api/publication/2824867 ID - 2824867 AB - The aim of this study was to investigate the effects of a single bout of whole-body vibration (WBV) on running gait. The running kinematic of sixteen male marathon runners was assessed on a treadmill at iso-efficiency speed after 10 min of WBV and SHAM (i.e. no WBV) conditions. A high-speed camera (210 Hz) was used for the video analysis and heart rate (HR) was also monitored. The following parameters were investigated: step length (SL), flight time (FT), step frequency (SF), contact time (CT), HR and the internal work (WINT). Full-within one-way analysis of variance (ANOVA) of the randomised crossover design indicated that when compared to SHAM conditions, WBV decreased the SL and the FT by ~4% (P < 0.0001) and ~7.2% (P < 0.001), respectively, and increased the SF ~4% (P < 0.0001) while the CT was not changed. This effect occurred during the first minute of running: the SL decreased ~3.5% (P < 0.001) and SF increased ~3.3% (P < 0.001). During the second minute the SL decreased ~1.2% (P = 0.017) and the SF increased ~1.1% (P = 0.02). From the third minute onwards, there was a return to the pre-vibration condition. The WINT was increased by ~4% (P < 0.0001) during the WBV condition. Ten minutes of WBV produced a significant alteration of the running kinematics during the first minutes post exposure. These results provide insights on the effects of WBV on the central components controlling muscle function. LA - English DB - MTMT ER - TY - JOUR AU - R, Di Giminiani AU - F, Masedu AU - Tihanyi, József AU - R, Scrimaglio AU - M, Valenti TI - The interaction between body position and vibration frequency on acute response to whole body vibration JF - JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY J2 - J ELECTROMYOGR KINES VL - 23 PY - 2013 IS - 1 SP - 245 EP - 251 PG - 7 SN - 1050-6411 DO - 10.1016/j.jelekin.2012.08.018 UR - https://m2.mtmt.hu/api/publication/2334186 ID - 2334186 AB - Purpose: The present study was designed to investigate the electromyographic (EMG) response in leg muscles to whole-body vibration while using different body positions and vibration frequencies. Methods: Twenty male sport sciences students voluntarily participated in this single-group, repeated-measures study in which EMG data from the vastus lateralis (VL) and the lateral gastrocnemius (LG) were collected over a total of 36 trials for each subject (4 static positions. ×. 9 frequencies). Results: We found that vibration frequency, body position and the muscle stimulated had a significant effect (P-values ranged from 0.001 to 0.031) on the EMG response. Similarly, the muscle. ×. frequency and position. ×. muscle interactions were significant (P<. 0.001). Interestingly, the frequency. ×. positions interactions were not significant (P>. 0.05). Conclusions: Our results indicate that lower frequencies of vibration (25-35. Hz) result in maximal activation of LG, whereas higher frequencies (45-55. Hz) elicit the highest responses in the VL. In addition, the position P2 (half squat position with the heels raised) is beneficial both for VL and LG, independently of the vibration frequency. © 2012 Elsevier Ltd. LA - English DB - MTMT ER - TY - JOUR AU - Di Giminiani, R AU - Manno, R AU - Scrimaglio, R AU - Sementilli, G AU - Tihanyi, József TI - Effects of individualized whole-body vibration on muscle flexibility and mechanical power JF - JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS J2 - J SPORT MED PHYS FIT VL - 50 PY - 2010 IS - 2 SP - 139 EP - 151 PG - 13 SN - 0022-4707 UR - https://m2.mtmt.hu/api/publication/1713851 ID - 1713851 N1 - Megjegyzés-21927771 Z9: 2 Megjegyzés-21930224 Z9: 2 Megjegyzés-21930460 Z9: 2 AB - Aim. The first purpose of the present study was to assess acute, residual and chronic effects of whole-body vibration on hamstring and lower back flexibility through the application of an individual frequency of vibration. The second purpose was to determine whether the applied vibration intervention over time influences flexibility and reactive strength differently. Methods. Thirty-four young physically active subjects (19 female and 15 male) were randomly assigned to either a Control or a Vibration Group. Lower back and hamstring flexibility was measured using the Stand and Reach Test. The reactive strength was estimated calculating the power in Drop Jump. Results. During whole-body vibration the relative change in acute flexibility for the Vibration Group (5.30 +/- 1.67 cm, 284%) reached a level of significance (P=0.038) compared to that of the Control Group (3.14 +/- 2.11 cm, 84%). Statistically significant differences in residual flexibility between the two groups were found at 6-min after the conclusion of vibration (P=0.034), at which point the Vibration Group showed the maximal relative change to pre-test (6.31 +/- 3.36 cm, 138%) versus the Control Group (3.06 +/- 1.87 cm, 20%). Chronic exposure of whole-body vibration did not produce significant changes in flexibility over time (P>0.05), whereas power in the Drop Jump performance of the Vibration Group increased significantly resulting in a benefit of 16% (P=0.019). Conclusion. The current study shows that individualized whole-body vibration without superimposing other exercises is an effective method of acutely increasing lower back and hamstring flexibility. Furthermore, the applied individualized whole-body vibration over time influences the reactive strength rather than flexibility. LA - English DB - MTMT ER - TY - JOUR AU - Di Giminiani, R AU - Tihanyi, József AU - Sáfár, Sándor AU - Scrimaglio, R TI - The effects of vibration on explosive and reactive strength when applying individualized vibration frequencies JF - JOURNAL OF SPORTS SCIENCES J2 - J SPORT SCI VL - 27 PY - 2009 IS - 2 SP - 169 EP - 177 PG - 9 SN - 0264-0414 DO - 10.1080/02640410802495344 UR - https://m2.mtmt.hu/api/publication/1306865 ID - 1306865 N1 - Megjegyzés-20899041 UR: http://www.scopus.com/inward/record.url?eid=2-s2.0-58949088642&partnerID=40&md5=e5054361c28be9e618f122e9d19742e7 Megjegyzés-20899180 UR: http://www.scopus.com/inward/record.url?eid=2-s2.0-58949088642&partnerID=40&md5=e5054361c28be9e618f122e9d19742e7 Megjegyzés-20898973 UR: http://www.scopus.com/inward/record.url?eid=2-s2.0-58949088642&partnerID=40&md5=e5054361c28be9e618f122e9d19742e7 LA - English DB - MTMT ER -