Maeda N1, Urabe Y1, Sasadai J1, Kotoshiba S1, Komiya M1, Morikawa M1
1Hiroshima University, Department of Graduate School of Biomedical & Health Sciences, Hiroshima, Japan
Background: Stretching is utilized for the conditioning, rehabilitation, and the injury prevention in many sports as a part of preparation before starting vigorous activities. There are various techniques of stretching, including static stretching (SS) and dynamic stretching. Our previous studies have reported influence for muscle stiffness and dynamic balance stability by cyclic stretching so far (Maeda et al., 2015). Recently, research dealing with the use of vibration as part of warm-up reported the effect of forward-split flexibility among male gymnasts. The effect of vibration has also been shown to increase range of motion (ROM) and muscle strength. Therefore, it may be advantageous to use a combination of static stretching and vibration (Vibration stretching; VS) for ROM and physical performance. But to our knowledge, no research has investigated the effect of VS for dynamic postural stability of landing movement.
Purpose: The purpose of this study was to clarify the acute effects of VS compared with SS for ROM and postural control after landing by using Dynamic Postural Stability Index (DPSI) (Wikstrom et al., 2005).
Methods: Seven healthy men participated in this study (mean, 23.6 ± 2.4 y.o., height: 170.6 ± 5.6 cm, weight: 64.6 ± 9.0 kg). Subjects were assigned to 3 randomly ordered experimental conditions, in which all subjects performed by no-stretching (control), SS and VS. SS and VS was performed maximum rage of ankle motion. VS was performed by using a combination of SS and vibration (MyoVolt, Christchurch, New Zealand) for 2 minutes. In the 3 conditions, the positions were maintained for two minutes on standing on electrical controlled device. All subjects were measured ankle-dorsiflextion range of motion (AROM) before and after two stretching interventions and a control condition. Dynamic postural stability was assessed using DPSI by jumping and landing single-legged onto a force platform. DPSI and the individual stability indices were calculated for each condition. Dynamic postural stability was assessed using a single-leg jump landing in the anterior direction. This study also used raw data signals to calculate the GRFmax, which was expressed as the magnitude of the peak force (N) divided by the subject's body weight. The data were compared among 3 conditions with repeated measures ANOVA, and significance level was set at 0.05.
Results: The results of this study indicated a significant effect of VS and SS compared with control for the change volume of ROM and VS produced a significant improvement in the DPSI compared with control and SS (p 0.05).
Conclusion(s): It is notable that whereas SS combined with vibration for 2 minutes hold durations adversely affect dynamic postural stability of landing single-legged when using electrical controlled device for which the stretching angle.
Implications: This study showed the influence of VS for dynamic postural stability of landing. It would contribute to development of stretching method for sports performance enhancement.
Keywords: Stretching, Vibration, Dynamic postural stability
Funding acknowledgements: We have no funding acknowledgement in this study.
Purpose: The purpose of this study was to clarify the acute effects of VS compared with SS for ROM and postural control after landing by using Dynamic Postural Stability Index (DPSI) (Wikstrom et al., 2005).
Methods: Seven healthy men participated in this study (mean, 23.6 ± 2.4 y.o., height: 170.6 ± 5.6 cm, weight: 64.6 ± 9.0 kg). Subjects were assigned to 3 randomly ordered experimental conditions, in which all subjects performed by no-stretching (control), SS and VS. SS and VS was performed maximum rage of ankle motion. VS was performed by using a combination of SS and vibration (MyoVolt, Christchurch, New Zealand) for 2 minutes. In the 3 conditions, the positions were maintained for two minutes on standing on electrical controlled device. All subjects were measured ankle-dorsiflextion range of motion (AROM) before and after two stretching interventions and a control condition. Dynamic postural stability was assessed using DPSI by jumping and landing single-legged onto a force platform. DPSI and the individual stability indices were calculated for each condition. Dynamic postural stability was assessed using a single-leg jump landing in the anterior direction. This study also used raw data signals to calculate the GRFmax, which was expressed as the magnitude of the peak force (N) divided by the subject's body weight. The data were compared among 3 conditions with repeated measures ANOVA, and significance level was set at 0.05.
Results: The results of this study indicated a significant effect of VS and SS compared with control for the change volume of ROM and VS produced a significant improvement in the DPSI compared with control and SS (p 0.05).
Conclusion(s): It is notable that whereas SS combined with vibration for 2 minutes hold durations adversely affect dynamic postural stability of landing single-legged when using electrical controlled device for which the stretching angle.
Implications: This study showed the influence of VS for dynamic postural stability of landing. It would contribute to development of stretching method for sports performance enhancement.
Keywords: Stretching, Vibration, Dynamic postural stability
Funding acknowledgements: We have no funding acknowledgement in this study.
Topic: Sport & sports injuries; Disability & rehabilitation
Ethics approval required: Yes
Institution: Hiroshima University
Ethics committee: Hiroshima University Committee
Ethics number: C-195
All authors, affiliations and abstracts have been published as submitted.
