The purpose of this investigation was to examine the acute effects of whole-body vibration (WBV) on muscular strength, flexibility, and heart rate (HR). Twenty adults (10 men, 10 women) untrained to WBV participated in the study. All subjects completed assessment of lower-extremity isokinetic torque, flexibility, and HR immediately before and after 6 minutes of WBV and 6 minutes of leg cycling ergometry (CYL), in randomized order. During WBV, subjects stood upright on a vibration platform for a total of 6 minutes. Vibration frequency was gradually increased during the first minute to a frequency of 26 Hz, which was maintained for the remaining 5 minutes. During CYL, power output was gradually increased to 50 W during the first minute and maintained at that power output for the remaining 5 minutes. Lower-extremity flexibility was determined using the sit-and-reach box test. Peak and average isokinetic torque of knee extension and flexion were measured by means of a motor-driven dynamometer with velocity fixed at 120 degrees .s. Change scores for the outcome measures were compared between treatments using Student's paired t-tests. Analysis revealed significantly greater HR acceleration with CYL (24.7 bpm) than after WBV (15.8 bpm). The increase of sit-and-reach scores after WBV (4.7 cm) was statistically greater (p < 0.05) than after CYL (0.8 cm). After WBV, increases in peak and average isokinetic torque of knee extension, 7.7% and 9.6%, were statistically greater than after CYL (p < 0.05). Average torque of knee flexion also increased more with WBV (+7.8%) than with CYL (-1.5%) (p < 0.05). The findings of this study indicate that short-term WBV standing elicits acute enhancements of lower-extremity muscular torque and flexibility, suggesting the application of this technology as a preparatory activity before more intense exercise.
"Therefore, the purpose of this study was to examine the acute effect of a single bout of two different training methods – whole body vibration (WBV) and no vibration group (NVG) – on flexibility and explosive strength of lower limbs in young competitive artistic gymnasts aged 9 to 12 years old. The hypothesis of this study was that WBV will improve flexibility and explosive strength based on previous findings which support that low vibration stimulus improved flexibility [8, 13, 15] and explosive strength [4, 24]. "
[Show abstract][Hide abstract] ABSTRACT: The purpose of this study was to examine the acute effect of a single bout of whole body vibration (WBV) on flexibility and explosive strength of lower limbs in young artistic gymnasts. Thirty-two young competitive gymnasts volunteered to participate in this study, and were allocated to either the vibration group or traditional body weight training according to the vibration protocol. The vibration intervention consisted of a single bout of eccentric and concentric squatting movements on a vibration platform that was turned on (vibration group: VG n = 15), whereas the traditional body weight (no vibration) group performed the same training protocol with the WBV device turned off (NVG: n= 17). Flexibility (sit and reach test) and explosive strength tests [squat jump (SJ), counter movement jump (CMJ), and single leg squat (right leg (RL) and left leg (LL))] were performed initially (pre-test), immediately after the intervention (post-test 1), and 15 minutes after the end of the intervention programme (post-test 15). Four 2x3 ANOVAs were used to examine the interaction between group (VG vs NVG) and time (pre, post 1, and post 15) with respect to examined variables. The results revealed that a significant interaction between group and time was found with respect to SJ (p < 0.05). However, no significant interaction between group and time was found with respect to flexibility, CMJ, RL and LL after the end of the intervention programme (p > 0.05). Further, the percentage improvement of the VG was significantly greater in all examined variables compared to the NVG. This study concluded that WBV training improves flexibility and explosive strength of lower limbs in young trained artistic gymnasts and maintains the initial level of performance for at least 15 minutes after the WBV intervention programme.
Biology of Sport 08/2014; 31(3):233-7. DOI:10.5604/20831862.1111852 · 0.79 Impact Factor
"when the gravitational force was 9.5 g. Exposure to WBV at 8.0 g in healthy adults elevated heart rate reserve by 8% . However, the potential for higher heart rates with increased gravitational forces during WBV should be offset with the risk of bone damage . "
[Show abstract][Hide abstract] ABSTRACT: The potential of whole-body vibration (WBV) as a mode of dyspnoea free physical activity for people with chronic obstructive pulmonary disease (COPD) is unknown among community-based settings. Furthermore, the acute effects of WBV on people with COPD have not been profiled in community-based settings. The aim of this community-based proof-of-concept trial was to describe acute effects of WBV by profiling subjective and objective responses to physical activity.
Seventeen community-dwelling older adults with COPD were recruited to participate in two sessions; WBV and sham WBV (SWBV). Each session consisted of five one-minute bouts interspersed with five one-minute passive rest periods. The gravitational force was ~2.5 g for WBV and ~0.0 g for SWBV. Reliability of baseline dyspnoea, heart rate, and oxygen saturation was first established and then profiled for both sessions. Acute responses to both WBV and SWBV were compared with repeated measures analysis of variance and repeated contrasts. Small changes in dyspnoea and oxygen saturation lacked subjective and clinical meaningfulness. One session of WBV and SWBV significantly increased heart rate (p <= 0.02), although there was no difference among WBV and SWBV (p = 0.67).
This community-based proof-of-concept trial showed that a session of WBV can be completed with the absence of dyspnoea for people with COPD. Furthermore, there were no meaningful differences among WBV and SWBV for heart rate and oxygen saturation. There is scope for long-term community-based intervention research using WBV given the known effects of WBV on peripheral muscle function and functional independence.
BMC Research Notes 11/2013; 6(1):452. DOI:10.1186/1756-0500-6-452
"WBV has been promoted as an ergogenic aid mode and, given its time efficiency for eliciting mild cardiovascular and metabolic changes (Cochrane et al., 2008; Rittweger, Schiessl and Felsenberg, 2001), it may be a suitable warm-up option to elicit temperature-related processes (Cochrane, 2011). Many researchers have reported temporary improvements in jumping ability after a single session of WBV (Bazett-Jones, Finch and Dugan, 2008; Cochrane and Stannard, 2005; Torvinen et al., 2002; Cormie et al., 2006; Jacobs and Burns, 2009; Sands et al., 2008), muscle force and power (Bosco et al., 2000; Stewart, Cochrane and Morton, 2009) which might be due to neural adaptations (Cochrane and Stannard, 2005). Since, as the increased motoneuron excitability is regarded as an integral part to enhance sprint performance (Ross, Leveritt and Riek, 2001) it could hypothesized that WBV may be a favorable method to enhance sprint performance (Cochrane, 2011). "
[Show abstract][Hide abstract] ABSTRACT: Whole-body vibration is a neuromuscular training method and has been suggested as an acute ergogenic aid mode before practice, training and competition activities of athletes. The aim of this study was to investigate the acute effects of a whole-body vibration session on sprint running kinematics and neuromuscular performance in well trained track & field sprinters. 30 sprint athletes participated in this study (age 21.6 ± 4.1 years, height 1.76
± 5.0 m, body mass 71.2 ± 6.4 kg). Both experimental (with vibration) and control (without vibration) groups performed a single session of whole-body vibration consisted of two dynamic exercises (half squat / lunge) using a body vibration platform (90 s, 50 Ηz, 2 mm). Performance tests (60m sprint, counter movement jump, muscle power and sit & reach test) were performed before and after 6 min the whole-body vibration session. Counter
movement jump was reduced after whole-body vibration by 3.9%, whereas all the other analyzed parameters remained unchanged. The results of this study do not support the use of whole-body vibration as an acute ergogenic aid during standardized warm-up in well trained track and field sprinters.
Ji-Geng Yan, Lin-Ling Zhang, Michael Agresti, Yuhui Yan, John LoGiudice, James R Sanger, Hani S Matloub, Kirkwood A Pritchard, Safwan S Jaradeh, Robert Havlik
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