Moxibustion Intervention Effect to Vertical Jump Performance

2020 ◽  
Vol 10 (5) ◽  
pp. 1171-1177
Author(s):  
Yuwei Liu ◽  
Feifei Chen ◽  
Gongju Liu ◽  
Zhiqiang Liang ◽  
Sergey Popik ◽  
...  
Keyword(s):  
Sagittal Plane ◽  
Vertical Jump ◽  
Reaction Force ◽  
Treatment Technique ◽  
Intervention Effect ◽  
Jump Performance ◽  
Young Males ◽  
The Difference ◽  
Analysis System ◽  
Exercise Fatigue

More and more people have known moxibustion as a traditional Chinese treatment technique. Moxibustion not only activate the immune system but also lessen sport tired effectively. The main goal of this study to investigate whether moxibustion alleviates the fatigue after the movement of the human body through biomechanics testing. The experiment recruited 6 young males as subjects, using moxibustion intervention after exercise-fatigue. The joint angle was obtained from Vicon motion analysis system, Kistler was used to measuring the GRF, jump height. In the sagittal plane, the peak angle of the hip, knee, ankle show significant differences between the intervention of moxibustion and no treatment during the take-off state. In the coronal plane, the main difference is represented in the landing state. In the transverse plane, both the take-off and landing state show the difference between the three conditions. The height of moxibustion intervention is significantly higher than baseline and no treatment; it may be indicated that the participants made a recovery well after the intervention of moxibustion. Nevertheless, the ground reaction force didn’t show significance. Overall, it can be concluded that moxibustion can have a direct effect on vertical jump performance during a fatigued state. Evidence from these results could perhaps suggest that moxibustion could be used as a preventative measure to reduce fatigue and enhance athlete performance.

Symmetry function as a new tool for evaluating the symmetry of gait in transfemoral amputees

2020 ◽  
Author(s):  
Slawomir Winiarski ◽  
Alicja Rutkowska-Kucharska ◽  
Mateusz Kowal
Keyword(s):  
Time Series ◽  
Gait Cycle ◽  
Sagittal Plane ◽  
Reaction Force ◽  
Frontal Plane ◽  
Symmetry Function ◽  
The Difference ◽  
Force Components ◽  
Analysis System ◽  
And Shifts

Abstract Background: Numerous studies have demonstrated significant asymmetries in unilateral amputee gait. The underlying dissimilarities between prosthetic and intact limbs have not yet been widely examined. To gain more insight into the functionality of asymmetries, we propose a new tool, the symmetry function (SF), to evaluate the symmetry of walking in terms of kinematic and dynamic variables of patients after unilateral transfemoral amputation and to identify areas with the largest side deviations in the movement cycle. Methods: An instrumented motion analysis system was used to register the gait of fourteen patients after unilateral trans-femoral amputation (TFA). Measurements involved evaluating the time series of gait variables characterizing a range of motion and the time series of the ground reaction force components. Comparison of the involved limb with the uninvolved limb in TFA patients was carried out on the basis of the SF values.Results: The symmetry function proved to be an excellent tool to localize the regions of asymmetry and their positive or negative directions in the full gait cycle. The difference between sides revealed by the symmetry function was the highest for the pelvis and the hip. In the sagittal plane, the pelvis was asymmetrically tilted, reaching the highest SF value of more than 25% at 60% cycle time. In the transverse plane, the pelvis was even more asymmetrically positioned throughout the entire gait cycle (50% difference on average). The hip in the frontal plane reached a 60% difference in SF throughout the single support phase for the prosthetic and then for the intact limb. Conclusions: The symmetry function allows for the detection of gait asymmetries and shifts in the center of gravity and may assess the precise in time adaptation of prostheses and rehabilitation monitoring, especially in unilateral impairments.Trial registration: The trial registration number (TRN): 379991 issued by the Australian New Zealand Clinical Trials Registry (ANZCTR) on 07.05.2020 (retrospectively registered).

scholarly journals A Meta-Analysis on the Effect of Complex Training on Vertical Jump Performance

2020 ◽  
Vol 71 (1) ◽  
pp. 255-265
Author(s):  
Jeffrey Pagaduan ◽  
Haris Pojskic
Keyword(s):  
Meta Analysis ◽  
Vertical Jump ◽  
The Other ◽  
Plyometric Training ◽  
Jump Performance ◽  
Other Hand ◽  
Plyometric Exercise ◽  
Traditional Resistance Training ◽  
Complex Training ◽  
The Difference

AbstractComplex training (CT) is a strength training intervention performed by completing all the sets of a resistance exercise followed by a series of high-velocity/plyometric exercise/s. The purpose of this novel study was to conduct a meta-analysis on the effect of CT on vertical jump (VJ) performance. Five electronic databases were searched using terms related to CT and the VJ. Studies needed to include randomized trials comparing CT with traditional resistance training (RT)/plyometric training (PLYO)/control (CON) lasting ≥ 4 weeks and the VJ as a dependent variable. Seven studies qualified for the meta-analysis with two studies differentiating VJ performance from CT and RT, two studies comparing VJ performance of CT and PLYO, and two studies establishing the difference in VJ performance between CT and CON. Results indicated similar improvement in VJ performance from CT and RT (p = 0.88). On the other hand, greater VJ performance in CT than PLYO was identified (ES = 0.86; 95% CI 0.24, 1.47; p = 0.01). CT also showed significantly greater enhancement in VJ compared to CON (ES = 1.14; 95% CI 0.60, 1.68; p < 0.01). In conclusion, CT can serve as alternative training from RT in improving VJ performance. On the other hand, CT is a better option in VJ enhancement than PLYO and CON.

scholarly journals Modelling of Muscle Force Distributions During Barefoot and Shod Running

2015 ◽  
Vol 47 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Jonathan Sinclair ◽  
Stephen Atkins ◽  
Jim Richards ◽  
Hayley Vincent
Keyword(s):  
Repeated Measures ◽  
Sagittal Plane ◽  
Vastus Lateralis ◽  
Reaction Force ◽  
Rectus Femoris ◽  
Camera Motion ◽  
Barefoot Running ◽  
Chronic Injuries ◽  
Analysis System ◽  
Hip Flexion

Abstract Research interest in barefoot running has expanded considerably in recent years, based around the notion that running without shoes is associated with a reduced incidence of chronic injuries. The aim of the current investigation was to examine the differences in the forces produced by different skeletal muscles during barefoot and shod running. Fifteen male participants ran at 4.0 m·s-1 (± 5%). Kinematics were measured using an eight camera motion analysis system alongside ground reaction force parameters. Differences in sagittal plane kinematics and muscle forces between footwear conditions were examined using repeated measures or Freidman’s ANOVA. The kinematic analysis showed that the shod condition was associated with significantly more hip flexion, whilst barefoot running was linked with significantly more flexion at the knee and plantarflexion at the ankle. The examination of muscle kinetics indicated that peak forces from Rectus femoris, Vastus medialis, Vastus lateralis, Tibialis anterior were significantly larger in the shod condition whereas Gastrocnemius forces were significantly larger during barefoot running. These observations provide further insight into the mechanical alterations that runners make when running without shoes. Such findings may also deliver important information to runners regarding their susceptibility to chronic injuries in different footwear conditions.

Vertical Jump Biomechanics Altered With Virtual Overhead Goal

2017 ◽  
Vol 33 (2) ◽  
pp. 153-159 ◽  
Author(s):  
Kevin R. Ford ◽  
Anh-Dung Nguyen ◽  
Eric J. Hegedus ◽  
Jeffrey B. Taylor
Keyword(s):  
Repeated Measures ◽  
Sagittal Plane ◽  
Vertical Jump ◽  
Biomechanical Testing ◽  
Real Life ◽  
Jump Height ◽  
Trunk Flexion ◽  
Jump Performance ◽  
Extrinsic Goals ◽  
Angular Impulse

Virtual environments with real-time feedback can simulate extrinsic goals that mimic real life conditions. The purpose was to compare jump performance and biomechanics with a physical overhead goal (POG) and with a virtual overhead goal (VOG). Fourteen female subjects participated (age: 18.8 ± 1.1 years, height: 163.2 ± 8.1 cm, weight 63.0 ± 7.9 kg). Sagittal plane trunk, hip, and knee biomechanics were calculated during the landing and take-off phases of drop vertical jump with different goal conditions. Repeated-measures ANOVAs determined differences between goal conditions. Vertical jump height displacement was not different during VOG compared with POG. Greater hip extensor moment (P < .001*) and hip angular impulse (P < .004*) were found during VOG compared with POG. Subjects landed more erect with less magnitude of trunk flexion (P = .002*) during POG compared with VOG. A virtual target can optimize jump height and promote increased hip moments and trunk flexion. This may be a useful alternative to physical targets to improve performance during certain biomechanical testing, screening, and training conditions.

The Difference in Vertical Jump Performance in Recreationally Trained Soccer and Basketball Males

2015 ◽  
Vol 47 ◽  
pp. 372
Author(s):  
Dan K. Nario ◽  
Matthew G. Bocanegra ◽  
Nicole M. Sauls ◽  
Nicole C. Dabbs
Keyword(s):  
Vertical Jump ◽  
Jump Performance ◽  
The Difference

Lower Extremity Biomechanical Demands During Saut de Chat Leaps

2016 ◽  
Vol 31 (4) ◽  
pp. 211-217 ◽  
Author(s):  
Danielle N Jarvis ◽  
Kornelia Kulig
Keyword(s):  
Lower Extremity ◽  
Sagittal Plane ◽  
Reaction Force ◽  
Three Dimensional ◽  
Vertical Force ◽  
Dance Training ◽  
Chronic Injuries ◽  
Analysis System ◽  
Kinetics Of ◽  
Kinematics And Kinetics

In dance, high demands are placed on the lower extremity joints during jumping tasks. The purpose of this study was to compare biomechanical demands placed on the lower extremity joints during the takeoff and landing phases of saut de chat leaps. METHODS: Thirty healthy, experienced dancers with 20.8±4.9 yrs of dance training performed 5 saut de chat leaps. A three-dimensional motion analysis system and force plates were used to collect kinematic and kinetic data. Ground reaction force (GRF) peaks and impulse and sagittal plane kinematics and kinetics of the hip, knee, ankle, and metatarsophalangeal (MTP) joints were calculated for the takeoff and landing phases of each leap. RESULTS: Saut de chat takeoffs demonstrated greater braking GRF impulse (p<0.001), while landings demonstrated greater peak vertical GRF (p<0.001). During takeoff, greater kinetic demands were placed on the MTP (p<0.001) and ankle (p<0.001) joints, while during landing greater kinetic demands were placed on the hip (p=0.037) joint. CONCLUSIONS: Both the takeoff and landing phases of saut de chat leaps place significant demands on a dancer’s body. Takeoff involves greater demands on the more distal joints and requires more braking forces, while the landing phase involves greater demands on the more proximal joints of the lower extremity and requires the dancer to absorb more vertical force. These demands, combined with extensive repetition of movements during training, may contribute to the high number of chronic injuries seen in dance.

A Comparative Biomechanical Analysis the Vertical Jump between Flatfoot and Normal Foot

2016 ◽  
Vol 28 ◽  
pp. 26-35 ◽  
Author(s):  
Feng Qin Fu ◽  
Sheng Wang ◽  
Yang Shu ◽  
Jian She Li ◽  
Sergey Popik ◽  
...  
Keyword(s):  
Contact Area ◽  
Peak Pressure ◽  
External Rotation ◽  
Vertical Jump ◽  
Self Regulation ◽  
Biomechanical Analysis ◽  
Vertical Jumping ◽  
The Difference ◽  
Analysis System ◽  
Future Work

Flatfoot has been one of the most common foot deformity, which gives rise to several malfunctions or disoders to the foot and lower extremity. Difference between flatfoot and normal foot mainly present in the middle foot, while few is known about the biomechanical difference under barefoot vertical jump. The objective of this study is to investigate the difference of flatfoot and normal foot while vertical jumping under barefoot condition. Twenty males (ten with flatfoot and ten with normal foot) volunteered to participate in this study. Foot morphology was measured with Easy-Foot-Scan. Foot kinetics and joint kinematics were obtained from EMED force platform and Vicon motion analysis system. Results showed that flatfoot group had a significantly larger peak pressure in the region of hallux and larger contact area of center forefoot than that of normal foot group, and larger contact area in medial midfoot. The flatfoot group presented larger plantarflexion and smaller external rotation to the ankle, and larger flexion and abduction and smaller external rotation to the knee than normal foot group during vertical jump. It can be concluded that people with flat-arched feet may have a poorer ability of self-regulation when facing a movement with rapid impact force like vertical jump, which will increase the risk of injuries. This information will be valuable for future work in structure, function and potential treatment of low arched feet.

scholarly journals Effect of 6-Month Fascia-Oriented Training on Jump Performance in Elite Female Volleyball Players

2017 ◽  
Vol 11 (2) ◽  
pp. 47-54
Author(s):  
Renáta Vychodilová ◽  
Martin Zvonař ◽  
Martin Sebera
Keyword(s):  
Scientific Evidence ◽  
Vertical Jump ◽  
Training Programme ◽  
Control Group ◽  
Performance Potential ◽  
Jump Performance ◽  
Volleyball Players ◽  
Before And After ◽  
Medium Level ◽  
The Difference

Fascia-oriented training is supposed to enhance physical performance potential. Specifically, the employment of the catapult mechanism, the refinement of the elastic energy storage, remodelling, rehydration and release in fascia tissue are supposed to enable faster and more powerful jump performance. The authors of the present study reviewed that little applied research has been conducted to bring scientific evidence verifying these findings in sports practice. The study was conducted to assess the effect of a 6-month, fascia-oriented training programme, designed in accordance with the principles of the fascia-oriented exercise, on the height of vertical countermovement jump (CMJ) performance in well-trained volleyball players. Sixteen female players (age 17.31 ± 0.98; height 173 ± 5.26; weight 65.25 ± 6.75) competing in the national league were randomly assigned for the training (TG) and control group (CG). TG performed a supervised 25-minute fascia-oriented training twice a week for six months. Measurements were conducted before and after the training intervention; the subjects performed 3 trials of CMJ. The study hypothesized that after the application, the height of CMJ would increase more in TG than in CG. The results show that the height of CMJ in TG increased comparing to CMJ height in CG, though the difference is not statistically significant. The results of the effect size manifest the increase of medium level, by 2.2cm in TG. Thus we conclude that the results of the study indicate that the application of the 6-month, fascia-oriented training aimed to develop the vertical jump performance potential in elite volleyball players is not statistically significantly beneficial.

scholarly journals The Effects of Whole-Body Vibration on Fatigue in Vertical Jump Performance and Isometric Mid-Thigh Pull Measures

Vibration ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 759-767
Author(s):  
Nicole C. Dabbs ◽  
Sergio Espericueta ◽  
Sean Bonilla ◽  
Margaret T. Jones
Keyword(s):  
Repeated Measures ◽  
Vertical Jump ◽  
Reaction Force ◽  
Whole Body ◽  
Lower Body ◽  
Jump Performance ◽  
Main Effect ◽  
Low Amplitude ◽  
Main Effects ◽  
Active Adults

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.

scholarly journals Lower Extremity Biomechanics During a Drop-Vertical Jump in Participants With or Without Chronic Ankle Instability

2018 ◽  
Vol 53 (4) ◽  
pp. 364-371 ◽  
Author(s):  
C. Collin Herb ◽  
Kaitlyn Grossman ◽  
Mark A. Feger ◽  
Luke Donovan ◽  
Jay Hertel
Keyword(s):  
Lower Extremity ◽  
Motion Capture ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Vertical Jump ◽  
Plantar Flexion ◽  
Reaction Force ◽  
Chronic Ankle Instability ◽  
Vertical Ground Reaction Force ◽  
Drop Vertical Jump

Context:  Chronic ankle instability (CAI) is a condition characterized by range-of-motion, neuromuscular, and postural-control deficits and subjective disability, reinjury, and posttraumatic osteoarthritis. Differences have been reported in kinematics, kinetics, surface electromyography (EMG), and ground reaction forces during functional tasks performed by those with CAI. These measures are often collected independently, and the research on collecting measures simultaneously during a movement task is limited. Objective:  To assess the kinematics and kinetics of the lower extremity, vertical ground reaction force (vGRF), and EMG of 4 shank muscles during a drop–vertical-jump (DVJ) task. Design:  Controlled laboratory study. Setting:  Motion-capture laboratory. Patients or Other Participants:  Forty-seven young, active adults in either the CAI (n = 24) or control (n = 23) group. Intervention(s):  Three-dimensional motion capture was performed using an electromagnetic motion-capture system. Lower extremity kinematics, frontal- and sagittal-plane kinetics, vGRF, and EMG of the shank musculature were collected while participants performed 10 DVJs. Main Outcome Measure(s):  Means and 90% confidence intervals were calculated for all measures from 100 milliseconds before to 200 milliseconds after force-plate contact. Results:  Patients with CAI had greater inversion from 107 to 200 milliseconds postcontact (difference = 4.01° ± 2.55°), smaller plantar-flexion kinematics from 11 to 71 milliseconds postcontact (difference = 5.33° ± 2.02°), greater ankle sagittal-plane kinetics from 11 to 77 milliseconds postcontact (difference = 0.17 ± 0.09 Nm/kg) and from 107 to 200 milliseconds postcontact (difference = 0.23 ± 0.03 Nm/kg), and smaller knee sagittal-plane kinematics from 95 to 200 milliseconds postcontact (difference = 8.23° ± 0.97°) than control participants after landing. The patients with CAI had greater vGRF from 94 to 98 milliseconds postcontact (difference = 0.83 ± 0.03 N/kg) and peroneal activity from 17 to 128 milliseconds postcontact (difference = 10.56 ± 4.52 N/kg) than the control participants. Conclusions:  Patients with CAI presented with differences in their landing strategies that may be related to continued instability. Kinematic and kinetic changes after ground contact and greater vGRF may be related to a faulty landing strategy. The DVJ task should be considered for rehabilitation protocols in these individuals.

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