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Pojskic H, Zombra Ž, Washif JA, Pagaduan J. Acute Effects of Loaded and Unloaded Whole-Body Vibration on Vertical Jump Performance in Karate Athletes. J Hum Kinet 2024; 92:203-212. [PMID: 38736596 PMCID: PMC11079925 DOI: 10.5114/jhk/172637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 09/20/2023] [Indexed: 05/14/2024] Open
Abstract
We investigated the acute effects of different whole-body vibration (WBV) interventions on the jump height of highly trained karate practitioners. Fifteen male karate club athletes (age: 20.0 ± 3.8 years; stature: 177.3 ± 4.7 cm; body mass: 76.9 ± 11.2 kg; % body fat: 9.2 ± 4.3) performed six randomized interventions: [a] static half-squat (SHS); [b] SHS with external loads at 30% of the body weight (SHS + 30%BW); [c] WBV at frequency (f) 25 Hz, and 2 mm amplitude (A) (WBV 25/2); [d] WBV 25/2 with external loads of 30% of the body weight (WBV 25/2 + 30% BW); [e] WBV at f = 50 Hz, and A = 4 mm (WBV 50/4), and [f] WBV 50/4 with external loads of 30% of the body weight (WBV 50/4 + 30% BW). Each intervention was performed for 5 sets at 60 s/set, with a rest interval of 30 s between sets. Countermovement jump (CMJ) data were collected at 2, 4, 6, 8 and 10 min after each preconditioning intervention. Two-way repeated-measures ANOVA revealed a non-significant main effect of intervention [F(5, 10) = 1.44, η2 = 0.42, p = 0.29)] and a significant main effect of the rest interval [F(4, 11) = 3.51, η2 = 0.56, p = 0.04)] on CMJ height. A rest interval of 4 min resulted in significantly higher CMJ values than a rest interval of 2 min (p = 0.031). In conclusion, utilizing a 4-min rest interval irrespective of the intervention schemes may have potential for enhancing jumping performance among highly trained karate athletes.
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Affiliation(s)
- Haris Pojskic
- Department of Sports Science, Faculty of Social Sciences, Linnaeus University, Kalmar, Sweden
| | - Željko Zombra
- Institute for Kinesiology, Lukavac, Bosnia and Herzegovina
- Faculty of Physical Education and Sports, University of Tuzla, Bosnia and Herzegovina
| | - Jad Adrian Washif
- Sports Performance Division, Institut Sukan Negara Malaysia (National Sports Institute of Malaysia), Kuala Lumpur, Malaysia
| | - Jeffrey Pagaduan
- Faculty of Physical Culture, Palacký University Olomouc, Olomouc, Czech Republic
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Buscà B, Aguilera-Castells J, Arboix-Alió J, Miró A, Fort-Vanmeerhaeghe A, Huertas P, Peña J. Superimposed vibration on suspended push-ups. PeerJ 2022; 10:e14435. [PMID: 36518295 PMCID: PMC9744143 DOI: 10.7717/peerj.14435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/31/2022] [Indexed: 12/03/2022] Open
Abstract
Background Superimposition of vibration has been proposed in sports training using several devices and methods to enhance muscle activation and strength adaptations. Due to the popularity of suspension training, vibration systems have recently been developed to increase the effects of this training method. The present cross-sectional study aims to examine the effects of superimposing vibration on one of the most popular exercises in strength and conditioning programs: push-ups. Methods Twenty-eight physically active men and women executed push-ups in three suspended conditions (non-vibration, vibration at 25 Hz, and vibration at 40 Hz). OMNI-Res scale was registered, and surface electromyographic signals were measured for the activity of the right and left external oblique, anterior deltoid, triceps brachii, sternal, and clavicular heads of the pectoralis major. Results A linear mixed model indicated a significant fixed effect for vibration at 25 Hz and 40 Hz on muscle activity. Suspended push-ups with superimposed vibration (25 Hz and 40 Hz) showed a significant higher activity on left (25 Hz: p = 0.036, d = 0.34; 40 Hz: p = 0.003, d = 0.48) and right external oblique (25 Hz: p = 0.004, d = 0.36; 40 Hz: p = 0.000, d = 0.59), anterior deltoid (25 Hz: p = 0.032, d = 0.44; 40 Hz: p = 0.003, d = 0.64), and global activity (25 Hz: p = 0.000, d = 0.55; 40 Hz: p = 0.000, d = 0.83) compared to non-vibration condition. Moreover, OMNI-Res significant differences were found at 25 Hz (6.04 ± 0.32, p = 0.000 d = 4.03 CI = 3.27, 4.79) and 40 Hz (6.21 ± 0.36 p = 0.00 d = 4.29 CI = 3.49, 5.08) compared to the non-vibration condition (4.75 ± 0.32). Conclusion Superimposing vibration is a feasible strategy to enhance the muscle activity of suspended push-ups.
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Affiliation(s)
- Bernat Buscà
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Joan Aguilera-Castells
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Jordi Arboix-Alió
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain,School of Health Science Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Adrià Miró
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Azahara Fort-Vanmeerhaeghe
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain,School of Health Science Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Pol Huertas
- Faculty of Psychology, Education Sciences, and Sport Blanquerna, Ramon Llull University, Barcelona, Spain
| | - Javier Peña
- Sport and Physyical Activity Studies Centre (CEEAF), University of Vic-Central University of Catalonia, Vic, Spain,Sport performance Analysis Research Group (SPARG), University of Vic-Central University of Catalonia, Vic, Spain
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Martins D, Rahal S, Silva Júnior J, Michelon F, Tomacheuski R, Correia L, Woods L, Mamprim M, Lourenço M, Santos I. Effects of reticulated hyaluronic acid alone or associated with whole-body vibration in dogs with osteoarthritis due to hip dysplasia. Top Companion Anim Med 2022; 49:100653. [DOI: 10.1016/j.tcam.2022.100653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 01/27/2022] [Accepted: 03/01/2022] [Indexed: 11/26/2022]
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Chwała W, Pogwizd P, Rydzik Ł, Ambroży T. Effect of Vibration Massage and Passive Rest on Recovery of Muscle Strength after Short-Term Exercise. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182111680. [PMID: 34770194 PMCID: PMC8582811 DOI: 10.3390/ijerph182111680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 11/17/2022]
Abstract
Background: The aim of the study was to compare the effect of vibration massage and passive rest on accelerating the process of muscle recovery after short-term intense exercise. Methods: Eighty-four healthy men aged 20 to 25 years participated in the study. Study participants performed isometric (ISO-M Group) and auxotonic (AUX-M group) contraction exercise in the lower limbs. Vibration massage was administered after exercise in the first recovery period. In the same period, controls rested passively, without the support of vibration massage. To assess the effectiveness of the applied vibration, a 4-fold measurement of the maximum force of the muscles involved in the exercise was performed under conditions of isometric contractions on a leg press machine set at an angle of 45° degrees upwards. Results: Differences in maximum strength during isometric contraction were found compared to baseline in favor of the groups subjected to the experimental vibration massage. Differences were demonstrated in muscle strength between the study groups (p < 0.005). The second period of passive rest in all groups did not bring significant changes in the values of maximal lower limb strength. Conclusions: Properly selected characteristics of the vibration effect can be an effective method in accelerating recovery and regaining lost motor capabilities of muscle groups fatigued by exercise. This offers the potential to shorten rest periods between sets of repetitions in training or between training units.
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Affiliation(s)
- Wiesław Chwała
- The Department of Biomechanics, University of Physical Education, Al. Jana Pawla II 78, 31-571 Cracow, Poland;
| | - Paweł Pogwizd
- Research and Development Department of Vitberg, Marcina Borelowskiego 29, 33-300 Nowy Sącz, Poland;
| | - Łukasz Rydzik
- Institute of Sports Sciences, University of Physical Education, 31-571 Krakow, Poland;
- Correspondence: ; Tel.: +48-730-696-377
| | - Tadeusz Ambroży
- Institute of Sports Sciences, University of Physical Education, 31-571 Krakow, Poland;
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The Effects of Whole-Body Vibration on Fatigue in Vertical Jump Performance and Isometric Mid-Thigh Pull Measures. VIBRATION 2021. [DOI: 10.3390/vibration4040042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of this study is to determine the effects of coupling WBV and acute muscular fatigue to determine its effects on countermovement vertical jump (CMVJ) performance and isometric mid-thigh pull (IMTP). Twenty-eight healthy active adults volunteered for five-day study. Testing sessions 2–5 included one of four conditions: No WBV and no fatigue (CON), WBV and fatigue (WBV + FAT), WBV and no fatigue (WBV), and no WBV and fatigue (FAT). WBV was performed using a frequency of 50 Hz and a low amplitude while performing quarter squats for a total of 4 min with a 30 s rest or work ratio. Lower-body fatigue induced using Bosco fatigue protocol. CMVJ and IMTP were performed on force plates. SPSS was used to perform a 2 × 2 Repeated Measures ANOVA. Significant main effects were found for fatigue in CMVJ-height and CMVJ-peak ground reaction force, no significant main effect for WBV, and no significant interactions. Lower-body fatigue decreases vertical jump performance, and WBV did not attenuate the detrimental effects of lower-body fatigue.
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Taghizadeh Delkhoush C, Bagheri R, Mashhadi Hashemi H, Fatemy E, Hedayati R. The immediate effect of whole body vibration training on the electromyographic activity of contralateral hand muscles; a randomized controlled trial. J Bodyw Mov Ther 2020; 24:293-299. [PMID: 32826003 DOI: 10.1016/j.jbmt.2020.02.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 01/01/2020] [Accepted: 02/24/2020] [Indexed: 11/24/2022]
Abstract
Whole Body Vibration (WBV) has been used as a useful adjunct to improve the neuromuscular function of the upper limb. Cross-transfer of strength plays an important role in rehabilitation of unilateral injuries. The present research intended to evaluate the acute effect of low frequency WBV training on cross-transfer of electromyographic activity and hand muscles strength when the measurement was performed on the contralateral limb. This was a randomized crossover trial conducted in a clinical biomechanics laboratory. Twenty-eight healthy participants aging between 20 and 35 years were included who were involved in two sessions with two weeks of rest. The participants were randomly assigned in two groups as follows: 1) active WBV/sham WBV; 2) sham WBV/active WBV. The participants were asked to stand on the vibrating plate and pull its belt in a vibrating mode using their dominant hand. Then, after a two-week rest, they performed the same task in the vibrating mode (35 Hz). Grip strength and electromyography (root mean square) in flexor digitorum profundus (FDP), flexor digitorum superficialis (FDS), extensor carpi radialis (ECR), and extensor carpi ulnaris (ECU) muscles of the contralateral limb were measured before and after exercise in both phases. No significant change was observed in the electrical activity of FDP, FDS, ECR, ECU muscles, and hands' grip strength of the contralateral limb (P > 0.05). WBV (35 Hz) was not able to augment cross-transfer in electromyographic activity and neuromuscular performance of the upper limb. Further studies would help to explore these results for several sessions of WBV on cross-transfer of training.
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Affiliation(s)
| | - Rasool Bagheri
- Neuromuscular Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan, Iran.
| | - Hamideh Mashhadi Hashemi
- Neuromuscular Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Elham Fatemy
- Neuromuscular Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Rozita Hedayati
- Neuromuscular Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan, Iran
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The Acute Effects of Whole Body Vibration on Isometric Mid-Thigh Pull Performance. VIBRATION 2020. [DOI: 10.3390/vibration3020008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The purpose of the present investigation was to examine the acute effects of whole body vibration (WBV) on isometric mid-thigh pull force–time curve (FTC) characteristics. Eleven recreationally trained subjects were randomly assigned to three treatment conditions: sham no vibration protocol (T1), vibration protocol 30 Hz 2–4 mm amplitude (T2), and vibration protocol 30 Hz 2–4 mm (T3). After completing a standardized warm-up, the subject stood on a vibration platform with the knee at a 120° angle and performed one of the three interventions. Each treatment condition required the subject to stand on the platform for thirty-second treatments, each separated by thirty seconds of recovery. Five minutes after the completion of the treatment conditions, the subjects performed the isometric mid-thigh pull. All FTCs were analyzed with standardized procedures for peak force (PF) and peak rate of force development (PRFD). A 1 × 3 repeated measures analysis of variance (ANOVA) was used to compare the three treatments. Additionally, coefficients of variance (CV), as well as intraclass and interclass correlations, were performed. There were no significant differences (p > 0.05) for any of the FTC analyses performed in this investigation. The CV and the 95% confidence interval (CI) indicate that the WBV protocol resulted in trivial changes in PF and beneficial changes in PRFD. A 30 Hz 2–4 mm amplitude WBV does not result in a significant increase in isometric mid-thigh pull performance.
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Miller RM, Heishman AD, Freitas EDS, Bemben MG. Comparing the Acute Effects of Intermittent and Continuous Whole-Body Vibration Exposure on Neuromuscular and Functional Measures in Sarcopenia and Nonsarcopenic Elderly Women. Dose Response 2018; 16:1559325818797009. [PMID: 30202250 PMCID: PMC6125857 DOI: 10.1177/1559325818797009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 07/26/2018] [Accepted: 07/31/2018] [Indexed: 11/16/2022] Open
Abstract
This investigation examined the acute effects of continuous whole-body vibration (CWBV) and intermittent whole-body vibration (IWBV) on neuromuscular and functional measures in women with sarcopenia and nonsarcopenic women. Continuous whole-body vibration was one 6-minute exposure, while IWBV consisted of six 60-second exposures to rest intervals (30 Hz, 2-4 mm amplitude). Factorial analyses revealed group × exposure × time interactions for jump height (JH; F = 10.8, P = .002), grip strength (GS; F = 15.5, P < .001), timed up and go test (F = 11.7, P = .002), and sit and reach test (S&R; F = 9.7, P = .004). Both JH and GS significantly improved post-WBV in women with sarcopenia (P < .001), with post-IWBV significantly greater (P < .001) than post-CWBV. Timed up and go test and S&R significantly improved post-IWBV in both the groups (P < .001) with post-IWBV significantly better than post-CWBV (P < .001). Bench press power at 20% one repetition maximum (1RM) revealed an exposure × time interaction (F = 4.6, P = .04) illuminating that IWBV significantly improved muscular power (P < .001). Bench press power at 40% 1RM revealed group × exposure (F = 6.4, P = .016) and exposure × time interactions (F = 5.8, P = .022). Individuals with sarcopenia significantly increased power output (P < .001) post-IWBV which was significantly greater than post-CWBV (P = .037). Bench press power at 60% 1RM revealed an exposure × time interaction (F = 8.6, P = .006), indicating that power was significantly improved post-IWBV (P = .027) and decreased post-CWBV. Berg Balance scale revealed a time main effect (F = 6.64, P = .015), and pain discomfort was significantly lower post-IWBV. These data indicate IWBV may provide a more efficacious exposure pattern in older women when compared to CWBV.
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Affiliation(s)
- Ryan M. Miller
- Neuromuscular Laboratory, Department of Health and Exercise Science,
University of Oklahoma, Norman, OK, USA
| | - Aaron D. Heishman
- Neuromuscular Laboratory, Department of Health and Exercise Science,
University of Oklahoma, Norman, OK, USA
| | - Eduardo D. S. Freitas
- Neuromuscular Laboratory, Department of Health and Exercise Science,
University of Oklahoma, Norman, OK, USA
| | - Michael G. Bemben
- Neuromuscular Laboratory, Department of Health and Exercise Science,
University of Oklahoma, Norman, OK, USA
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Hammer RL, Linton JT, Hammer AM. Effects of Heavy Squat Training on a Vibration Platform on Maximal Strength and Jump Performance in Resistance-Trained Men. J Strength Cond Res 2018. [PMID: 29528956 DOI: 10.1519/jsc.0000000000002565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hammer, RL, Linton, JT, and Hammer, AM. Effects of heavy squat training on a vibration platform on maximal strength and jump performance in resistance-trained men. J Strength Cond Res 32(7): 1809-1815, 2018-The purpose of this investigation was to determine maximal strength and jump performance outcomes of heavy squat training on a low-amplitude (<1.0 mm peak-to-peak) vibration platform (VP). Nineteen recreationally resistance-trained college-aged men (22.3 ± 1.66 years) completed the 6-week study. Participants were randomly assigned to 1 of 2 training groups: SQT (n = 10) performed conventional back squats on the floor and SQTV (n = 9) performed back squats on the VP. Supervised training took place over 12 sessions (2 d·wk), which used an aggressive strength development protocol (85-95% 1 repetition maximum [1RM]), which was identically followed by both groups. After the intervention, both groups showed (via t-test) a marked increase (p < 0.001) in 1RM squat strength (SQT = 34.5 kg vs. SQTV = 36.2 kg), but there was no significant difference (via mixed analysis of variance) between groups (p = 0.875). Standing broad jump performance increased by an average of 5-6 cm, but was not significantly changed in either group (SQT; p = 0.199, SQTV; p = 0.087). In conclusion, squats performed with whole body vibration (WBV) were not superior to conventional squats with respect to maximal strength and jump performance outcomes. It seems that there was no additive effect of superimposed WBV training on strength beyond that caused by strength training alone. This study can help strength conditioning professionals and athletes make an informed decision on whether to invest in a VP and use WBV as an alternative or a complementary mode of training.
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Affiliation(s)
- Roger L Hammer
- Division of Exercise Science, School of Health Sciences, Herbert H. and Grace A. Dow College of Health Professions, Central Michigan University, Mount Pleasant, Michigan
| | - Joshua T Linton
- Division of Exercise Science, School of Health Sciences, Herbert H. and Grace A. Dow College of Health Professions, Central Michigan University, Mount Pleasant, Michigan
| | - Adam M Hammer
- Doctoral Program in Physical Therapy, School of Rehabilitation and Medical Sciences, Herbert H. and Grace A. Dow College of Health Professions, Central Michigan University, Mount Pleasant, Michigan
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Øfsteng S, Sandbakk Ø, van Beekvelt M, Hammarström D, Kristoffersen R, Hansen J, Paulsen G, Rønnestad BR. Strength training improves double-poling performance after prolonged submaximal exercise in cross-country skiers. Scand J Med Sci Sports 2017; 28:893-904. [PMID: 29024041 DOI: 10.1111/sms.12990] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2017] [Indexed: 12/01/2022]
Abstract
The purpose of this study was to investigate the effects of adding strength training with or without vibration to cross-country (XC) skiers' endurance training on double-poling (DP) performance, physiological, and kinematic adaptations. Twenty-one well-trained male XC-skiers combined endurance- and upper-body strength training three times per week, either with (n = 11) or without (n = 10) superimposed vibrations for 8 weeks, whereas eight skiers performed endurance training only (CON). Testing included 1RM in upper-body exercises, work economy, neural activation, oxygen saturation in muscle, and DP kinematics during a prolonged submaximal DP roller ski test which was directly followed by a time to exhaustion (TTE) test. TTE was also performed in rested state, and the difference between the two TTE tests (TTEdiff ) determined the ability to maintain DP performance after prolonged exercise. Vibration induced no additional effect on strength or endurance gains. Therefore, the two strength training groups were pooled (STR, n = 21). 1RM in STR increased more than in CON (P < .05), and there were no differences in changes between STR and CON in any measurements during prolonged submaximal DP. STR improved TTE following prolonged DP (20 ± 16%, P < .001) and revealed a moderate effect size compared to CON (ES = 0.80; P = .07). Furthermore, STR improved TTEdiff more than CON (P = .049). In conclusion, STR superiorly improved 1RM strength, DP performance following prolonged submaximal DP and TTEdiff , indicating a specific effect of improved strength on the ability to maintain performance after long-lasting exercise.
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Affiliation(s)
- S Øfsteng
- Inland Norway University of Applied Sciences, Lillehammer, Norway
| | - Ø Sandbakk
- Centre for Elite Sports Research, Norwegian University of Science and Technology, Trondheim, Norway
| | - M van Beekvelt
- Centre for Elite Sports Research, Norwegian University of Science and Technology, Trondheim, Norway
| | - D Hammarström
- Inland Norway University of Applied Sciences, Lillehammer, Norway
| | - R Kristoffersen
- Centre for Elite Sports Research, Norwegian University of Science and Technology, Trondheim, Norway
| | - J Hansen
- Inland Norway University of Applied Sciences, Lillehammer, Norway
| | - G Paulsen
- Norwegian Olympic Sport Center, Oslo, Norway
| | - B R Rønnestad
- Inland Norway University of Applied Sciences, Lillehammer, Norway
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Yang WW, Chou LW, Chen WH, Shiang TY, Liu C. Dual-frequency whole body vibration enhances vertical jumping and change-of-direction ability in rugby players. JOURNAL OF SPORT AND HEALTH SCIENCE 2017; 6:346-351. [PMID: 30356653 PMCID: PMC6189261 DOI: 10.1016/j.jshs.2015.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 08/13/2015] [Accepted: 09/22/2015] [Indexed: 06/08/2023]
Abstract
BACKGROUND Traditional vertical and side-alternating whole body vibrations (WBV) can effectively improve muscle power performance but have a limited efficacy for enhancing change-of-direction (COD) ability. Novel dual-plate WBV uniquely providing various directions of movements with higher and distinctive frequencies for each leg may cause better acute effect on muscle power and stretch-shortening cycle efficacy contributing to COD ability. Therefore, the purpose of this study was to investigate the acute effect of dual- or single-frequency WBV on squat jumps (SJs), countermovement jumps (CMJs), eccentric utilization ratios (EURs), and COD ability in rugby players. METHODS Fourteen male rugby players were recruited and performed a 4 min partial squat with 3 types of WBV protocols on a dual-plate WBV machine, including 1 dual-frequency WBV protocol (DFW) with the dominant leg receiving 35 Hz and the non-dominant leg receiving 45 Hz, and 2 single-frequency WBV protocols (SFWs) with 35 Hz or 45 Hz provided to both legs (SFW35Hz and SFW45Hz) on 3 different days. RESULTS The results showed that all the vibration protocols significantly improved SJ and CMJ performances (SJ: p = 0.008; CMJ: p < 0.001), but did not significantly change EURs (p > 0.05). In addition, only the DFW significantly improved COD ability (p = 0.001 for the pre-post comparison). CONCLUSION A 4 min dual-frequency WBV session improved both vertical jumping and COD ability in rugby players, suggesting that this could be a potential warm-up protocol for athletes.
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Affiliation(s)
- Wen-Wen Yang
- Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei 111, Taiwan, China
- Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei 112, Taiwan, China
| | - Li-Wei Chou
- Department of Physical Therapy and Assistive Technology, National Yang-Ming University, Taipei 112, Taiwan, China
| | - Wei-Han Chen
- Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei 111, Taiwan, China
- Department of Physical Education, National Taiwan Normal University, Taipei 106, Taiwan, China
| | - Tzyy-Yuang Shiang
- Department of Athletic Performance, National Taiwan Normal University, Taipei 116, Taiwan, China
| | - Chiang Liu
- Graduate Institute of Sports Equipment Technology, University of Taipei, Taipei 111, Taiwan, China
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Immediate effects of whole-body vibration on neuromuscular performance of quadriceps and oscillation of the center of pressure: A randomized controlled trial. ACTA ACUST UNITED AC 2016; 25:62-8. [PMID: 27422599 DOI: 10.1016/j.math.2016.06.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 05/16/2016] [Accepted: 06/07/2016] [Indexed: 11/20/2022]
Abstract
BACKGROUND Whole body vibration has become a popular practice in training and rehabilitation centers. Although proposed as a useful adjunct to improve various aspects of musculoskeletal function, its real benefits and immediate physiological responses are still uncertain. OBJECTIVES This study analyzed the immediate effects of whole-body vibration with two distinct frequencies on neuromuscular performance of the quadriceps femoris and in the postural control of healthy subjects. DESIGN Randomized controlled trial. METHODS Sixty physically active women were submitted to an evaluation of the oscillation of the center of pressure through baropodometry and isokinetic performance of quadriceps femoris muscle of the non-dominant limb, associated with the electromyographic amplitude assessment of vastus lateralis muscle. Subjects were randomly divided into three groups: control group - performed an exercise protocol with the vibrating platform off; 30 and 50 Hz groups - conducted the exercise protocol with the platform on, with a frequency of 30 and 50 Hz, respectively. RESULTS There was a significant reduction in the time of peak torque in three evaluated groups (p < 0.001), with no differences between the groups (p = 0.586). There were no significant differences in pressure center oscillation, peak torque normalized for body weight, total work, and average power nor in the value of the root mean square in any of the groups. CONCLUSION This study suggests that the exercise protocol on the vibrating platform does not change neuromuscular performance or the pressure center oscillation of healthy women. CLINICALTRIALS. GOV IDENTIFIER NCT02416362.
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Rønnestad BR, Slettaløkken G, Ellefsen S. Adding Whole Body Vibration to Preconditioning Exercise Increases Subsequent On-Ice Sprint Performance in Ice-hockey Players. J Strength Cond Res 2016. [DOI: 10.1519/jsc.0b013e3182a9535a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bosveld R, Field-Fote EC. Single-dose effects of whole body vibration on quadriceps strength in individuals with motor-incomplete spinal cord injury. J Spinal Cord Med 2015; 38:784-91. [PMID: 25664489 PMCID: PMC4725812 DOI: 10.1179/2045772315y.0000000002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
CONTEXT Paresis associated with motor-incomplete spinal cord injury (SCI) impairs function. Whole body vibration (WBV) may increase strength by activating neuromuscular circuits. OBJECTIVE We assessed effects of a single session of WBV on lower extremity strength in individuals with motor-incomplete SCI. DESIGN A single-session blinded randomized controlled trial. SETTING Rehabilitation research laboratory. PARTICIPANTS Subjects (n = 25; age 49.7 ± 12.5 years) had chronic SCI (>1 year) and were able to stand for at least 45 seconds. Interventions Subjects were randomized either to WBV (n = 13) consisting of four 45-second bouts with 1-minute intervening rest periods (frequency: 50 Hz, amplitude: 2 mm) or to sham electrical stimulation (n = 12). OUTCOME MEASURES Maximal voluntary isometric quadriceps force was measured with a fixed dynamometer. A modified Five-Time-Sit-To-Stand (FTSTS) test was used to assess functional lower extremity strength. Measures were made at pre-test, immediate post-test, and delayed post-test 20 minutes later. RESULTS At immediate post-test, change in voluntary isometric force in the WBV group was 1.12 kg greater than in the sham group. The within-group change for the WBV group was significant with a moderate effect size (P = 0.05; ES = 0.60). No force-related changes were observed in the sham group. The modified FTSTS scores improved in both groups, suggesting that this measure was subject to practice effects. CONCLUSION Evidence from the present study suggests that even a single session of WBV is associated with a meaningful short-term increase in quadriceps force-generating capacity in persons with motor-incomplete SCI. The multi-session use of WBV as part of a strengthening program deserves exploration.
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Affiliation(s)
- Rick Bosveld
- Department of Biomedical Engineering, University of Twente, Enschede, Netherlands
| | - Edelle C. Field-Fote
- Correspondence to: Edelle Carmen Field-Fote, Director of Spinal Cord Injury Research, Shepherd Center–Crawford Research Institute, 2020 Peachtree Rd NW, Atlanta, GA 30309. E-mail:
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Effectiveness of Different Rest Intervals Following Whole-Body Vibration on Vertical Jump Performance between College Athletes and Recreationally Trained Females. Sports (Basel) 2015. [DOI: 10.3390/sports3030258] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Dallas G, Paradisis G, Kirialanis P, Mellos V, Argitaki P, Smirniotou A. The acute effects of different training loads of whole body vibration on flexibility and explosive strength of lower limbs in divers. Biol Sport 2015; 32:235-41. [PMID: 26424927 PMCID: PMC4577566 DOI: 10.5604/20831862.1163373] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 12/04/2014] [Accepted: 12/22/2014] [Indexed: 11/21/2022] Open
Abstract
The purpose of this study was to examine the acute effects of different vibration loads (frequency and amplitude) of whole-body vibration (WBV) on flexibility and explosive strength of lower limbs in springboard divers. Eighteen male and female divers, aged 19 ± 2 years, volunteered to perform 3 different WBV protocols in the present study. To assess the vibration effect, flexibility and explosive strength of lower limbs were measured before (Pre), immediately after (Post 1) and 15 min after the end of vibration exposure (Post 15). Three protocols with different frequencies and amplitudes were used in the present study: a) low vibration frequency and amplitude (30 Hz/2 mm); b) high vibration frequency and amplitude (50 Hz/4 mm); c) a control protocol (no vibration). WBV protocols were performed on a Power Plate platform, whereas the no vibration divers performed the same protocol but with the vibration platform turned off. A two-way ANOVA 3 x 3 (protocol × time) with repeated measures on both factors was used. The level of significance was set at p < 0.05. Univariate analyses with simple contrasts across time were selected as post hoc tests. Intraclass coefficients (ICC) were used to assess the reliability across time. The results indicated that flexibility and explosive strength of lower limbs were significantly higher in both WBV protocols compared to the no vibration group (NVG). The greatest improvement in flexibility and explosive strength, which occurred immediately after vibration treatment, was maintained 15 min later in both WBV protocols, whereas NVG revealed a significant decrease 15 min later, in all examined strength parameters. In conclusion, a bout of WBV significantly increased flexibility and explosive strength in competitive divers compared with the NVG. Therefore, it is recommended to incorporate WBV as a method to increase flexibility and vertical jump height in sports where these parameters play an important role in the success outcome of these sports.
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Affiliation(s)
- G Dallas
- National and Kapodistrian University of Athens, Department of Physical Education and Sport Science, Greece
| | - G Paradisis
- National and Kapodistrian University of Athens, Department of Physical Education and Sport Science, Greece
| | - P Kirialanis
- Democritus University of Thrace, Department of Physical Education and Sport Science, Greece
| | - V Mellos
- School Advisor of Physical Education and Sport Science, Greece
| | - P Argitaki
- National and Kapodistrian University of Athens, Department of Physical Education and Sport Science, Greece
| | - A Smirniotou
- National and Kapodistrian University of Athens, Department of Physical Education and Sport Science, Greece
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Pojskic H, Pagaduan J, Uzicanin E, Babajic F, Muratovic M, Tomljanovic M. Acute effects of loaded whole body vibration training on performance. Asian J Sports Med 2015; 6:e24054. [PMID: 25883774 PMCID: PMC4393544 DOI: 10.5812/asjsm.24054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 12/24/2014] [Indexed: 11/30/2022] Open
Abstract
Background: The application of whole body vibration (WBV) as a warm-up scheme has been receiving an increasing interest among practitioners. Objectives: The aim of this study was to determine the effect of loaded and unloaded WBV on countermovement jump, speed and agility. Patients and Methods: Twenty-one healthy male college football players (age: 20.14 ± 1.65 years; body height: 179.9 ± 8.34 cm; body mass: 74.4 ± 13.0 kg; % body fat: 9.45 ± 4.8) underwent randomized controlled trials that involved standing in a half squat position (ST), ST with 30% of bodyweight (ST + 30%), whole body vibration at f = 50 Hz, A = 4 mm (WBV), and WBV with 30% bodyweight (WBV + 30% BW) after a standardized warm-up. Post measures of countermovement jump, 15-m sprint, and modified t-test were utilized for analyses. Results: One way repeated measures ANOVA revealed a significant difference in the countermovement jump performance, F (3, 60 = 9.06, η2 = 2.21, P = 0.000. Post-hoc showed that WBV + 30% BW posted significant difference compared to (P = 0.008), ST + 30% BW (P = 0.000) and WBV (P = 0.000). There was also a significant difference in the sprint times among interventions, F (3, 60) = 23.0, η2 = 0.865, P = 0.000. Post hoc showed that WBV + 30% BW displayed significantly lower time values than ST (P = 0.000), ST + 30% BW (P = 0.000) and WBV (P = 0.000). Lastly, there was a significant difference in the agility performance across experimental conditions at F(2.01, 40.1) = 21.0, η2 = 0.954, P = 0.000. Post hoc demonstrated that WBV have lower times than ST (P = 0.013). Also, WBV + 30% BW posted lower times compared to ST (P = 0.000), ST + 30% (P = 0.000) and WBV (P = 0.003). Conclusions: Additional external load of 30% bodyweight under WBV posted superior gains in countermovement jump, speed and agility compared to unloaded WBV, loaded non-WBV and unloaded non-WBV interventions.
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Affiliation(s)
- Haris Pojskic
- Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina
- Center for Sports Excellence, Tuzla, Bosnia and Herzegovina
| | - Jeffrey Pagaduan
- College of Human Kinetics, University of the Philippines - Diliman, Quezon, Philippines
- Corresponding author: Jeffrey Pagaduan, College of Human Kinetics, University of the Philippines - Diliman, Quezon City, Philippines. Tel: +63-29296033, E-mail:
| | - Edin Uzicanin
- Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina
- Center for Sports Excellence, Tuzla, Bosnia and Herzegovina
| | - Fuad Babajic
- Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina
- Center for Sports Excellence, Tuzla, Bosnia and Herzegovina
| | - Melika Muratovic
- Department of Physical Education and Sport, Tuzla University, Tuzla, Bosnia and Herzegovina
- Center for Sports Excellence, Tuzla, Bosnia and Herzegovina
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Cloak R, Nevill A, Wyon M. The acute effects of vibration training on balance and stability amongst soccer players. Eur J Sport Sci 2014; 16:20-6. [PMID: 25357208 DOI: 10.1080/17461391.2014.973912] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Acute whole body vibration training (WBVT) is a tool used amongst coaches to improve performance prior to activity. Its effects on other fitness components, such as balance and stability, along with how different populations respond are less well understood. The aim of the current research is to determine the effect of acute WBVT on balance and stability amongst elite and amateur soccer players. Forty-four healthy male soccer players (22 elite and 22 amateur) were assigned to a treatment or control group. The intervention group then performed 3 × 60 seconds static squat on vibration platform at 40 Hz (±4 mm) with Y balance test (YBT) scores and dynamic postural stability index (DPSI) measured pre and post. DPSI was significantly lower in the elite players in the acute WBVT compared to amateur players (F1, 40= 6.80; P = 0.013). YBT anterior reach distance showed a significant improvement in both amateur and elite players in the acute WBVT group (F1, 40= 32.36; P < 0.001). The improvement in DPSI amongst the elite players indicates a difference in responses to acute high frequency vibration between elite and amateur players during a landing stability task. The results indicate that acute WBVT improves anterior YBT reach distances through a possible improvement in flexibility amongst both elite and amateur players. In conclusion, acute WBVT training appears to improve stability amongst elite soccer players in comparison to amateur players, the exact reasoning behind this difference requires further investigation.
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Affiliation(s)
- Ross Cloak
- a Research Centre for Sport, Exercise and Performance , The University of Wolverhampton , Walsall , UK
| | - Alan Nevill
- a Research Centre for Sport, Exercise and Performance , The University of Wolverhampton , Walsall , UK
| | - Matthew Wyon
- a Research Centre for Sport, Exercise and Performance , The University of Wolverhampton , Walsall , UK
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Surowiec RK, Wang H, Nagelkirk PR, Frame JW, Dickin DC. The Effects of Whole-Body Vibration on the Wingate Test for Anaerobic Power When Applying Individualized Frequencies. J Strength Cond Res 2014; 28:2035-41. [DOI: 10.1519/jsc.0000000000000341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Manimmanakorn N, Hamlin MJ, Ross JJ, Manimmanakorn A. Long-Term Effect of Whole Body Vibration Training on Jump Height. J Strength Cond Res 2014; 28:1739-50. [DOI: 10.1519/jsc.0000000000000320] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Marín PJ, Herrero AJ, Milton JG, Hazell TJ, García-López D. Whole-body vibration applied during upper body exercise improves performance. J Strength Cond Res 2014; 27:1807-12. [PMID: 23085972 DOI: 10.1519/jsc.0b013e3182772f00] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Whole-body vibration (WBV) training has exercisers perform static and dynamic resistance training exercises on a ground-based platform. Exposure to WBV exposure has demonstrated benefits and no effect on lower body strength, power, and performance. The aim of this study was to determine if WBV exposure (50 Hz, 2.51 mm) has any potentiating effects postexercise by measuring the kinematic variables of a set of upper body elbow-extensor exercise (70% one-repetition maximum [1RM]) to volitional exhaustion. Sixteen recreationally active students (12 male and 4 female) performed 3 different experimental conditions on separate days. Each condition had the subjects perform 1 set of elbow-extension exercise to fatigue with 1 of 3 WBV treatments: WBV simultaneously during the set (AE); 60 seconds after application of WBV for 30 seconds (RE); and no WBV (CTRL). Kinematic parameters of each repetition were monitored by linking a rotary encoder to the highest load plate. The mean velocity and acceleration throughout the set and perceived exertion were analyzed. A significant increase (p < 0.05) was observed in the mean velocity for the whole set in the AE condition vs. the CTRL condition. The mean acceleration was significantly higher (p < 0.05) in the AE condition in comparison with RE (increased by 45.3%) and CTRL (increased by 50.4%) conditions. The positive effect induced by WBV on upper-limb performance is only achieved when the stimulus is applied during the exercise. However, WBV applied 60 seconds before upper body exercise results in no benefit.
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Affiliation(s)
- Pedro J Marín
- Laboratory of Physiology, European University Miguel de Cervantes, Valladolid, Spain.
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LIN HWAITING, CHEN YINGYU, WANG DEANCHUAN, CHOU PEIHSI, GUO LANYUEN, WU WENLAN. THE ACUTE EFFECT OF TRAINING FREQUENCIES AND NUMBER OF SETS OF WHOLE BODY VIBRATION ON KNEE JOINT PROPRIOCEPTION. J MECH MED BIOL 2014. [DOI: 10.1142/s0219519414500365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Whole body vibration affects neuromuscular systems through the stimulation of receptors in muscles and tendons. This study investigated the acute effects of different training intensities of WBV on knee joint proprioception. A total of 18 untrained males participated in this study. Joint position sense was tested as an index of joint proprioception ability. Frequencies of 20, 35, and 50 Hz with two mm of displacement vibration training were tested. Each frequency was tested in different numbers of sets (four, six, eight, and ten sets). As it turned out, the results indicated a significant improvement in active JPS at 35 Hz for all testing sets, and only at 20 Hz with ten sets. As for passive JPS, significant improvements were obtained only at 35 Hz with ten sets of training. WBV training affected knee joint proprioception in active JPS with shorter vibration exposure at lower frequencies and amplitude. Coaches, athletes and physical therapists should consider using WBV training for its potential benefits in warm-ups and rehabilitation.
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Affiliation(s)
- HWAI-TING LIN
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
| | - YING-YU CHEN
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
| | - DEAN-CHUAN WANG
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
| | - PEI-HSI CHOU
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
- Department of Orthopaedic Surgery, Kaohsiung Medical University, 807, Kaohsiung, Taiwan
| | - LAN-YUEN GUO
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
| | - WEN-LAN WU
- Department of Sports Medicine, Kaohsiung University, 807, Kaohsiung, Taiwan
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Acute effect of whole-body vibration at optimal frequency on muscle power output of the lower limbs in older women. Am J Phys Med Rehabil 2013; 92:797-804. [PMID: 23552332 DOI: 10.1097/phm.0b013e31828cd375] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The aim of this study was to identify the frequency of whole-body vibration (WBV) that elicits the greatest improvement in lower limb power output after an acute exposure in older women, with the hypothesis that an individualized optimal vibration frequency (OVF) would be more effective than a fixed vibration frequency. DESIGN Maximal power output was measured during a double leg press on an isoinertial dynamometer in nine women with a mean (SD) age of 71 (3) yrs, 1 and 5 mins after WBV on a platform at three different frequencies, in a random order: 20 Hz, 50 Hz, and OVF, determined for each subject by identifying the frequency corresponding to the maximal electromyographic muscle response. RESULTS The mean (SD) OVF was 33 (2.5) Hz. The 25.9% increase in maximal power output after 1 min of WBV at OVF was significantly higher (P < 0.05) than the 14.3% increase after 1 min of WBV at 20 Hz. Similarly, the 32.1% increase in maximal power output after 5 mins of WBV at OVF was significantly higher (P < 0.01) than the 16.1% and 16.3% increase after 5 mins of WBV at 20 Hz and 50 Hz, respectively. CONCLUSIONS Frequency of WBV should be prescribed in an individualized fashion, within the range of 30-35 Hz in this target population of older women.
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Fernandes IA, Kawchuk G, Bhambhani Y, Gomes PSC. Does whole-body vibration acutely improve power performance via increased short latency stretch reflex response? J Sci Med Sport 2013; 16:360-4. [PMID: 23266241 DOI: 10.1016/j.jsams.2012.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 08/17/2012] [Accepted: 08/25/2012] [Indexed: 10/27/2022]
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Kosar AC, Candow DG, Putland JT. Potential beneficial effects of whole-body vibration for muscle recovery after exercise. J Strength Cond Res 2013; 26:2907-11. [PMID: 22130390 DOI: 10.1519/jsc.0b013e318242a4d3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Whole-body vibration is an emerging strategy used by athletes and exercising individuals to potentially accelerate muscle recovery. The vibration elicits involuntary muscle stretch reflex contractions leading to increased motor unit recruitment and synchronization of synergist muscles, which may lead to greater training adaptations over time. Intense exercise training, especially eccentric muscle contractions, will inevitably lead to muscle damage and delayed onset muscle soreness, which may interfere with the maintenance of a planned training program. Whole-body vibration before and after exercise shows promise for attenuating muscle soreness and may be considered as an adjunct to traditional therapies (i.e., massage, cryotherapy) to accelerate muscle recovery.
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Affiliation(s)
- Angela C Kosar
- Faculty of Kinesiology and Health Studies, Aging Muscle and Bone Health Laboratory, University of Regina, Regina, Saskatchewan, Canada
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Neuromuscular fatigue induced by whole-body vibration exercise. Eur J Appl Physiol 2013; 113:1625-34. [PMID: 23344670 DOI: 10.1007/s00421-013-2590-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 01/10/2013] [Indexed: 10/27/2022]
Abstract
The aim of this study was to examine the magnitude and the origin of neuromuscular fatigue induced by half-squat static whole-body vibration (WBV) exercise, and to compare it to a non-WBV condition. Nine healthy volunteers completed two fatiguing protocols (WBV and non-WBV, randomly presented) consisting of five 1-min bouts of static half-squat exercise with a load corresponding to 50 % of their individual body mass. Neuromuscular fatigue of knee and ankle muscles was investigated before and immediately after each fatiguing protocol. The main outcomes were maximal voluntary contraction (MVC) torque, voluntary activation, and doublet peak torque. Knee extensor MVC torque decreased significantly (P < 0.01) and to the same extent after WBV (-23 %) and non-WBV (-25 %), while knee flexor, plantar flexor, and dorsiflexor MVC torque was not affected by the treatments. Voluntary activation of knee extensor and plantar flexor muscles was unaffected by the two fatiguing protocols. Doublet peak torque decreased significantly and to a similar extent following WBV and non-WBV exercise, for both knee extensors (-25 %; P < 0.01) and plantar flexors (-7 %; P < 0.05). WBV exercise with additional load did not accentuate fatigue and did not change its causative factors compared to non-WBV half-squat resistive exercise in recreationally active subjects.
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Sañudo B, Feria A, Carrasco L, de Hoyo M, Santos R, Gamboa H. Does whole body vibration training affect knee kinematics and neuromuscular control in healthy people? J Sports Sci 2012; 30:1537-44. [PMID: 22894146 DOI: 10.1080/02640414.2012.713503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This study aimed to investigate the effect of whole body vibration (WBV) training on the knee kinematics and neuromuscular control after single-legged drop landings. Surface electromyographic (EMG) activity of the rectus femoris and hamstring muscles and knee and ankle accelerometry signals were acquired from 42 healthy volunteers. Participants performed three pre-test landings and after a recovery period of three minutes, they completed one set of six bouts of WBV each of one minute duration (30 Hz - 4 mm), followed by a single-leg drop landing. After the WBV intervention no significant changes were observed in the kinematic outcomes measured, although the time to stabilise the lower-limb was significantly lower after the vibration training (F(8,41) = 6.55; P < 0.01). EMG analysis showed no significant differences in the amplitude of rectus femoris or hamstring muscles after WBV training, however, significant differences in EMG frequency of the rectus femoris were found before (F(8,41) = 7.595; P < 0.01) and after toe-down (F(8,41) = 4.440; P < 0.001). Finally, no significant changes were observed in knee or ankle acceleration after WBV. Results suggest that WBV can help to acutely enhance knee neuromuscular control, which may have clinical significance and help in the design of rehabilitation programmes.
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Affiliation(s)
- Borja Sañudo
- University of Seville, Department of Physical Education and Sport, Seville, Spain.
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Rønnestad BR, Holden G, Samnøy LE, Paulsen G. Acute effect of whole-body vibration on power, one-repetition maximum, and muscle activation in power lifters. J Strength Cond Res 2012; 26:531-9. [PMID: 22240544 DOI: 10.1519/jsc.0b013e318220d9bb] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purpose of this study was to investigate the acute effect of whole-body vibration with a frequency of 50 Hz (WBV(50Hz)) on peak power in squat jump (SJ), 1 repetition maximum (1RM) in parallel squat, and electromyography (EMG) activity and compare them with no-vibration conditions in power lifters. Twelve national level male power lifters (age 24 ± 5 years, body mass 110 ± 24 kg, height 179 ± 7 cm) tested peak power in SJ and 1RM in parallel squat while they were randomly exposed to WBV(50Hz) or to no vibration. These tests were performed in a Smith Machine. Peak power output was higher while performed with a WBV(50Hz) compared with the no-WBV condition (p < 0.05). This increase in power output was accompanied by higher EMG starting values and EMG peak values of the investigated thigh muscles during WBV(50Hz) (p < 0.05). There was no difference between adding WBV(50Hz) and no-vibration conditions in 1RM parallel squat. In conclusion, the results of this study suggest that the application of WBV(50Hz) acutely increases peak power output during SJ in well strength trained individuals such as power lifters. This increase in power was accompanied by an increased EMG activity in the quadriceps muscles. However, in 1RM parallel squat, there was no difference between WBV50Hz and no-vibration conditions. Therefore, adding WBV(50Hz) has no acute additive effect on 1RM parallel squat in power lifters and, based on the present findings, may thus not be recommended in the training to improve 1RM in power lifters. However, WBV(50Hz) seems to have an acute additive effect on peak power output and may be used in well strength trained individuals for whom a high power output is important for performance.
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Rønnestad BR, Ellefsen S. The effects of adding different whole-body vibration frequencies to preconditioning exercise on subsequent sprint performance. J Strength Cond Res 2012; 25:3306-10. [PMID: 22076085 DOI: 10.1519/jsc.0b013e318215f298] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Rønnestad, BR and Ellefsen, S. The effects of adding different whole-body vibration frequencies to preconditioning exercise on subsequent sprint performance. J Strength Cond Res 25(12): 3306-3310, 2011-The phenomenon postactivation potentiation can possibly be used to acutely improve sprint performance. The purpose of this study was to investigate the effect of adding whole-body vibration (WBV) to body-loaded half-squats, performed as preconditioning activity to the 40-m sprint test. Nine male amateur soccer players performed 1 familiarization session and 6 separate test sessions. Each session included a standardized warm-up followed by 1 of the after preconditioning exercises: 30-seconds of half-squats with WBV at either 50 or 30 Hz or half-squats without WBV. The 40-m sprint was performed 1 minute after the preconditioning exercise. For each subject, each of the 3 protocols was repeated twice on separate days in a randomized order. Mean values were used in the statistical analysis. Performing the preconditioning exercise with WBV at a frequency of 50 Hz resulted in a superior 40-m sprint performance compared to preconditioning exercise without WBV (5.48 ± 0.19 vs. 5.52 ± 0.21 seconds, respectively, p < 0.05). There was no difference between preconditioning exercise with WBV at a frequency of 30 Hz and the no-WBV condition. In conclusion, preconditioning exercise performed with WBV at 50 Hz seems to enhance 40-m sprint performance in recreationally trained soccer players. The present findings suggest that coaches can incorporate such exercise into the warm-up to improve sprint performance or the quality of the sprint training.
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Affiliation(s)
- Bent R Rønnestad
- Faculty of Human, Sports, and Social Sciences, Lillehammer University College, Lillehammer, Norway.
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Bagheri J, van den Berg-Emons RJ, Pel JJ, Horemans HL, Stam HJ. Acute Effects of Whole-Body Vibration on Jump Force and Jump Rate of Force Development: A Comparative Study of Different Devices. J Strength Cond Res 2012; 26:691-6. [DOI: 10.1519/jsc.0b013e31822a5d27] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pollock RD, Woledge RC, Martin FC, Newham DJ. Effects of whole body vibration on motor unit recruitment and threshold. J Appl Physiol (1985) 2011; 112:388-95. [PMID: 22096119 DOI: 10.1152/japplphysiol.01223.2010] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Whole body vibration (WBV) has been suggested to elicit reflex muscle contractions but this has never been verified. We recorded from 32 single motor units (MU) in the vastus lateralis of 7 healthy subjects (34 ± 15.4 yr) during five 1-min bouts of WBV (30 Hz, 3 mm peak to peak), and the vibration waveform was also recorded. Recruitment thresholds were recorded from 38 MUs before and after WBV. The phase angle distribution of all MUs during WBV was nonuniform (P < 0.001) and displayed a prominent peak phase angle of firing. There was a strong linear relationship (r = -0.68, P < 0.001) between the change in recruitment threshold after WBV and average recruitment threshold; the lowest threshold MUs increased recruitment threshold (P = 0.008) while reductions were observed in the higher threshold units (P = 0.031). We investigated one possible cause of changed thresholds. Presynaptic inhibition in the soleus was measured in 8 healthy subjects (29 ± 4.6 yr). A total of 30 H-reflexes (stimulation intensity 30% Mmax) were recorded before and after WBV: 15 conditioned by prior stimulation (60 ms) of the antagonist and 15 unconditioned. There were no significant changes in the relationship between the conditioned and unconditioned responses. The consistent phase angle at which each MU fired during WBV indicates the presence of reflex muscle activity similar to the tonic vibration reflex. The varying response in high- and low-threshold MUs may be due to the different contributions of the mono- and polysynaptic pathways but not presynaptic inhibition.
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Affiliation(s)
- Ross D Pollock
- Centre of Human and Aerospace Physiological Sciences, King's College London, UK.
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Oliveira WLD, Silva RD, Custódio IJO, Barcelos SAMGD. Análise da influência da plataforma vibratória no desempenho do salto vertical em atletas de futebol: ensaio clínico randomizado. FISIOTERAPIA EM MOVIMENTO 2011. [DOI: 10.1590/s0103-51502011000200008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVOS: O objetivo deste estudo é analisar a influência da Plataforma Vibratória no desempenho do salto vertical de atletas de futebol. MATERIAIS E MÉTODOS: A amostra foi composta de 30 atletas de futebol do sexo masculino, idade (18,57 ± 0,81 anos), peso (75,49 ± 7,463 kg), altura (1,79 ± 0,057 cm), percentual de gordura corporal (9.6 ± 1,327%) e IMC (22,89 ± 1,354 kg/m2) alocados aleatoriamente em Grupo 1 (VCI) e Grupo 2 (CIQ). Valores de p < 0,05 foram considerados estatisticamente significativos. RESULTADOS: A altura do CMJSBB aumentou significativamente (p = 0,0001) após ambas as intervenções (VCI e CIQ), reduzindo também de forma significativa no período de follow-up (p = 0,0003). Não houve diferença significativa entre os grupos em todos os períodos (p = 0,524). No CMJCBB, houve um aumento significativo na altura do salto ao se comparar o grupo antes e depois das intervenções por VCI e CIQ (p = 0,001) e uma diminuição significativa comparando as medidas após as intervenções com o follow-up. Em relação aos tratamentos (G1 vs G2) não houve diferença estatística entre eles em todos os períodos (p = 0,675). DISCUSSÃO: De acordo com os resultados, houve diferenças em relação ao fator tempo (pré, pós e follow-up). No entanto, não foram observadas mudanças em relação aos tratamentos propostos ao G1 e ao G2. O período de exposição de quatro semanas de VCI não produziu ganhos adicionais nas características morfológicas e/ou nas propriedades neuromusculares em longo prazo no G1 quando comparados com o G2. CONCLUSÃO: O treinamento por VCI pode ser introduzido com fins complementares à rotina de treinamento de atletas de futebol, objetivando a melhora do desempenho muscular nos membros inferiores atribuídos de forma quantitativa na capacidade de saltar desses indivíduos.
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Hazell TJ, Lemon PWR. Synchronous whole-body vibration increases VO₂ during and following acute exercise. Eur J Appl Physiol 2011; 112:413-20. [PMID: 21573780 DOI: 10.1007/s00421-011-1984-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Accepted: 04/25/2011] [Indexed: 10/18/2022]
Abstract
Single bout whole-body vibration (WBV) exercise has been shown to produce small but significant increases in oxygen consumption (VO(2)). How much more a complete whole-body exercise session (multiple dynamic exercises targeting both upper and lower body muscles) can increase VO(2) is unknown. The purpose of this study was to quantify VO(2) during and for an extended time period (24 h) following a multiple exercise WBV exercise session versus the same session without vibration (NoV). VO(2) of healthy males (n = 8) was measured over 24 h on a day that included a WBV exercise session versus a day with the same exercise session without vibration (NoV), and versus a control day (no exercise). Upper and lower body exercises were studied (five, 30 s, 15 repetition sets of six exercises; 1:1 exercise:recovery ratio over 30 min). Diet was controlled. VO(2) was 23% greater (P = 0.002) during the WBV exercise session versus the NoV session (62.5 ± 12.0 vs. 50.7 ± 8.2 L O(2)) and elicited a higher (P = 0.033) exercise heart rate versus NoV (139 ± 6 vs. 126 ± 11 bpm). Total O(2) consumed over 8 and 24 h following the WBV exercise was also increased (P < 0.010) (240.5 ± 28.3 and 518.9 ± 61.2 L O(2)) versus both NoV (209.7 ± 22.9 and 471.1 ± 51.6 L O(2)) and control (151.4 ± 20.7 and 415.2 ± 51.6 L O(2)). NoV was also increased versus control (P < 0.003). A day with a 30-min multiple exercise, WBV session increased 24 h VO(2) versus a day that included the same exercise session without vibration, and versus a non-exercise day by 10 and 25%, respectively.
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Affiliation(s)
- Tom J Hazell
- Exercise Nutrition Research Laboratory, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, 2235 3M Centre, London, Ontario, N6A 3K7, Canada.
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Nepocatych S, Bishop PA, Balilionis G, Richardson MT, Hubner PJ. Acute effect of upper-body vibration on performance in master swimmers. J Strength Cond Res 2011; 24:3396-403. [PMID: 21088551 DOI: 10.1519/jsc.0b013e3181e8a4fe] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purpose of the study was to evaluate the effects of regular warm-up, and upper-body vibration (UBV), or UBV+ short warm-up on swimming performance in Masters Swimmers. Six women and 4 men, mean age 35 ± 9 years, active master swimmers volunteered to participate in the study. Participants were assigned to complete 1 of 3 warm-up types: regular, UBV-only, or UBV + short, rest for 3 minutes, and then completed a 50-yd (45.7 m) freestyle maximal performance time trial. The UBV treatment consisted of 5 minutes of upper-body vibration with a frequency of 22 Hz. Rating of perceived exertion (RPE) and heart rate (HR) were measured post warm-up and post 50-yd time trial. No significant mean differences (p = 0.56) were found among regular, UBV-only, or UBV + short warm-ups for 50-yd freestyle time (29.1 ± 3.36, 28.9 ± 3.39, and 29.1 ± 3.55 seconds, respectively). Individual data indicated that 40% (4/10) of the swimmers swam their fastest with UBV-only and 20% (2/10) with UBV + short warm-up compared to 40% (4/10) with regular warm-up. The RPE pre and post warm-ups did not differ significantly (p = 0.059 and p = 0.216, respectively). A significantly higher (p = 0.023) HR was observed after regular warm-up compared to UBV + short warm-up. Furthermore, HR post 50-yd after regular warm-up was significantly higher compared to UBV-only (p = 0.005) and UBV + short warm-up (p = 0.013). The findings of the present study indicate that UBV and UBV + short warm-up may be considered as addition or an alternative warm-up strategy to regular swimming warm-up, producing reduced cardio stress and perceived effort.
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Affiliation(s)
- Svetlana Nepocatych
- Department of Kinesiology, The University of Alabama, Tuscaloosa, Alabama, USA
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Rønnestad BR, Nygaard H, Raastad T. Physiological elevation of endogenous hormones results in superior strength training adaptation. Eur J Appl Physiol 2011; 111:2249-59. [PMID: 21327794 DOI: 10.1007/s00421-011-1860-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 01/29/2011] [Indexed: 01/08/2023]
Abstract
The purpose of this study was to determine the influence of transiently elevated endogenous hormone concentrations during exercise on strength training adaptations. Nine subjects performed four unilateral strength training session per week on the elbow flexors for 11 weeks. During two of the weekly sessions, leg exercises were performed to acutely increase the systemic anabolic hormone concentration immediately before the exercises for one of the elbow flexors (L + A). On the two other weekly training sessions, the contralateral elbow flexors were trained without prior leg exercises (A). By randomizing one arm of the subjects to serve as a control and the other as experimental, both conditions have the same nutritional and genetic environment. Serum testosterone and growth hormone was significantly increased during the L - A training session, while no hormonal changes occurred in the A session. Both A and L + A increased 1RM in biceps curl, peak power in elbow flexors at 30 and 60% of 1RM, and muscle volume of the elbow flexors (p < 0.05). However, only L + A achieved increase in CSA at the part of the arm flexors with largest cross sectional area (p < 0.001), while no changes occurred in A. L + A had superior relative improvement in 1RM biceps curl and favorable muscle adaptations in elbow flexors compared to A (p < 0.05). In conclusion, performing leg exercises prior to arm exercises, and thereby increasing the levels of serum testosterone and growth hormone, induced superior strength training adaptations compared to arm training without acute elevation of hormones.
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Affiliation(s)
- Bent R Rønnestad
- Lillehammer University College, PB. 952, 2604 Lillehammer, Norway.
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Dabbs NC, Muñoz CX, Tran TT, Brown LE, Bottaro M. Effect of different rest intervals after whole-body vibration on vertical jump performance. J Strength Cond Res 2011; 25:662-7. [PMID: 21311347 DOI: 10.1519/jsc.0b013e318207eafc] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Whole-body vibration (WBV) may potentiate vertical jump (VJ) performance via augmented muscular strength and motor function. The purpose of this study was to evaluate the effect of different rest intervals after WBV on VJ performance. Thirty recreationally trained subjects (15 men and 15 women) volunteered to participate in 4 testing visits separated by 24 hours. Visit 1 acted as a familiarization visit where subjects were introduced to the VJ and WBV protocols. Visits 2-4 contained 2 randomized conditions per visit with a 10-minute rest period between conditions. The WBV was administered on a pivotal platform with a frequency of 30 Hz and an amplitude of 6.5 mm in 4 bouts of 30 seconds for a total of 2 minutes with 30 seconds of rest between bouts. During WBV, subjects performed a quarter squat every 5 seconds, simulating a countermovement jump (CMJ). Whole-body vibration was followed by 3 CMJs with 5 different rest intervals: immediate, 30 seconds, 1 minute, 2 minutes, or 4 minutes. For a control condition, subjects performed squats with no WBV. There were no significant (p > 0.05) differences in peak velocity or relative ground reaction force after WBV rest intervals. However, results of VJ height revealed that maximum values, regardless of rest interval (56.93 ± 13.98 cm), were significantly (p < 0.05) greater than the control condition (54.44 ± 13.74 cm). Therefore, subjects' VJ height potentiated at different times after WBV suggesting strong individual differences in optimal rest interval. Coaches may use WBV to enhance acute VJ performance but should first identify each individual's optimal rest time to maximize the potentiating effects.
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Affiliation(s)
- Nicole C Dabbs
- Kinesiology Department, Human Performance, Laboratory, California State University, Fullerton, California, USA
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Kavanaugh A, Ramsey MW, Sands WA, Haff GG, Stone MH. Acute whole-body vibration does not affect static jump performance. Eur J Sport Sci 2011. [DOI: 10.1080/17461391.2010.481333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lamont HS, Cramer JT, Bemben DA, Shehab RL, Anderson MA, Bemben MG. The Acute Effect of Whole-Body Low-Frequency Vibration on Countermovement Vertical Jump Performance in College-Aged Men. J Strength Cond Res 2010; 24:3433-42. [DOI: 10.1519/jsc.0b013e3181c1ff7e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hazell TJ, Kenno KA, Jakobi JM. Evaluation of muscle activity for loaded and unloaded dynamic squats during vertical whole-body vibration. J Strength Cond Res 2010; 24:1860-5. [PMID: 20543737 DOI: 10.1519/jsc.0b013e3181ddf6c8] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purpose of this investigation was to examine if the addition of a light external load would enhance whole-body vibration (WBV)-induced increases in muscle activity during dynamic squatting in 4 leg muscles. Thirteen recreationally active male university students performed a series of dynamic squats (unloaded with no WBV, unloaded with WBV, loaded with no WBV, and loaded with WBV). The load was set to 30% of body mass and WBV included 25-, 35-, and 45-Hz frequencies with 4-mm amplitude. Muscle activity was recorded with surface electromyography (EMG) on the vastus lateralis (VL), biceps femoris (BF), tibialis anterior (TA), and gastrocnemius (GC) and is reported as EMGrms (root mean square) normalized to %maximal voluntary exertion. During unloaded dynamic squats, exposure to WBV (45 Hz) significantly (p < 0.05) increased baseline muscle activity in all muscles, except the TA compared with no WBV. Adding a light external load without WBV increased baseline muscle activity of the squat exercise in all muscles but decreased the TA. This loaded level of muscle activity was further increased with WBV (45 Hz) in all muscles. The WBV-induced increases in muscle activity in the loaded condition (approximately 3.5%) were of a similar magnitude to the WBV-induced increases during the unloaded condition (approximately 2.5%) demonstrating the addition of WBV to unloaded or loaded dynamic squatting results in an increase in muscle activity. These results demonstrate the potential effectiveness of using external loads with exposure to WBV.
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Affiliation(s)
- Tom J Hazell
- Exercise Nutrition Research Laboratory, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada
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Siu PM, Tam BT, Chow DH, Guo JY, Huang YP, Zheng YP, Wong SH. Immediate effects of 2 different whole-body vibration frequencies on muscle peak torque and stiffness. Arch Phys Med Rehabil 2010; 91:1608-15. [PMID: 20875522 DOI: 10.1016/j.apmr.2010.07.214] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 07/03/2010] [Accepted: 07/03/2010] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To examine the immediate effects of 2 vibration protocols with different vibration frequencies that yielded the same maximum acceleration (106.75ms(-2)) on muscle peak torque and stiffness of knee extensor and flexor. DESIGN Randomized crossover study with repeated measures. SETTING Laboratory setting. PARTICIPANTS Recreationally active male adults (N=10). INTERVENTION Participants performed 10 bouts of 60-second static half squats intermitted with a 60-second rest period between bouts on a platform with no vibration (control) and a vibration frequency of 26Hz or 40Hz. MAIN OUTCOME MEASURES Concentric and eccentric peak torques of knee extensor and flexor were examined within 5 minutes before and after vibration by isokinetic test. Young's modulus as an index of tissue stiffness was determined at quadriceps and hamstring pre- and postvibration by using an ultrasound indentation method. RESULTS The 2-way repeated-measures analysis of variance indicated a significant interaction effect between vibration and vibration frequency for knee extensor concentric peak torque (P=.003). The vibration-induced changes of knee extensor concentric peak torque in vibration frequency of 26Hz (14.5Nm) and 40Hz (12.0Nm) were found to be significantly greater than that in controls (-29.4Nm) (P<.05). The change in eccentric peak torque of knee flexor after vibration tended to be greater in 26Hz of vibration frequency when compared with controls (26Hz of vibration frequency vs controls: 13.9±7.1 vs -11.4±5.3Nm, P=.08). No statistically significant differences were obtained in tissue stiffness in the quadriceps and hamstring with any of the conditions. CONCLUSIONS Our data suggest that whole-body vibration at a frequency of 26Hz and 40Hz preclude the decline in concentric peak torque of knee extensor observed after 10 bouts of 60 seconds of static half squats. A change in muscle mechanical stiffness property as induced by whole-body vibration is not supported by our data.
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Affiliation(s)
- Parco M Siu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, China.
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Gerodimos V, Zafeiridis A, Karatrantou K, Vasilopoulou T, Chanou K, Pispirikou E. The acute effects of different whole-body vibration amplitudes and frequencies on flexibility and vertical jumping performance. J Sci Med Sport 2010; 13:438-43. [DOI: 10.1016/j.jsams.2009.09.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Revised: 08/27/2009] [Accepted: 09/04/2009] [Indexed: 11/29/2022]
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