scholarly journals Determining Partnering Effects in the “Rise and Fall” Motion of Competitive Waltz by the Use of Statistical Parametric Mapping

2021 ◽  
Vol 1 (120) ◽  
pp. 4-12
Author(s):  
Yasuyuki Yoshida ◽  
Arunas Bizokas ◽  
Katusha Demidova ◽  
Shinichi Nakai ◽  
Rie Nakai ◽  
...  
Keyword(s):  
Center Of Mass ◽  
Capture Rate ◽  
National Level ◽  
Statistical Parametric Mapping ◽  
Vertical Component ◽  
Parametric Mapping ◽  
Ballroom Dance ◽  
World Champion ◽  
Pair Condition ◽  
Male Dancers

Background. Competitive dance, also known as “DanceSport,” is a competitive style of ballroom dance. The waltz features a particular movement in which the dancer lifts and lowers his/her body while dancing. In ballroom dance terms, this movement is known as the “rise and fall.” The purpose of this research was to examine partnering effects in relation to the vertical component of dancers’ center of mass when performing the competitive waltz. Methods. This investigation was conducted through statistical parametric mapping of the movements of 13 national level competitive dance couples and a world champion couple as they danced both solo and in pairs. The Xsens MVN system was used to record their movements, using a capture rate of 240 Hz. Results. We consequently found that, in the pair condition, the vertical component of the center of mass was smaller for the male dancers and larger for the champion male dancer when compared to their respective solo conditions. However, for the female dancers and the champion female dancer, unlike the males, no significant partner effects were found. Conclusion. Therefore, in terms of partner effects, the “rise and fall.” motion was smaller for the male dancers and larger for the champion male dancer. Keywords: DanceSport, ballroom, kinematics, partnering, statistical parametric mapping.

Partnering Effects on Joint Motion Range and Step Length in the Competitive Waltz Dancers

2020 ◽  
Vol 24 (4) ◽  
pp. 168-174
Author(s):  
Yasuyuki Yoshida ◽  
Arunas Bizokas ◽  
Katusha Demidova ◽  
Shinichi Nakai ◽  
Rie Nakai ◽  
...  
Keyword(s):  
National Level ◽  
Step Length ◽  
Upper Body ◽  
Joint Motion ◽  
Salient Characteristic ◽  
The World ◽  
Ballroom Dance ◽  
Motion Range ◽  
World Champion ◽  
Pair Condition

Competitive dance, also known as DanceSport, is one of the official sports of the World Games. The most salient characteristic of ballroom dance is the closed-hold position, during which the upper body segments of partner-dancers are linked. This study aimed to investigate partnering effects on joint motion ranges of the lower extremity and step lengths during the waltz in 13 national level competitive dance couples and a world champion couple. A Xsens MVN system was used to record movement at 240 Hz. Solo and pair conditions were examined. Compared with the highly skilled couples, the world champion couple demonstrated superior dance skills for generating the first step length in the pair condition of the waltz. This was particularly evident in the step length and joint motion range of the champion female dancer.

scholarly journals Head and body dyskinesia during gait in tactical athletes with vestibular deficit following concussion

2021 ◽  
Author(s):  
John J Fraser ◽  
Jacob A VanDehy ◽  
Dawn M Bodell ◽  
Kim R Gottshall ◽  
Pinata H Sessoms
Keyword(s):  
Walking Speed ◽  
Center Of Mass ◽  
Three Dimensional ◽  
Statistical Parametric Mapping ◽  
Neurological Impairment ◽  
Control Group ◽  
Initial Contact ◽  
Parametric Mapping ◽  
Movement Strategy ◽  
Vestibular Deficit

Background: Vestibular deficit is common following concussion and may affect gait. The purpose of this study was to investigate differences in head and pelvic center of mass (COM) movement during gait in tactical athletes with and without concussion-related central vestibular impairment. Methods: 24 patients with post-concussion vestibular impairment (20 males, 4 females; age: 31.7±7.9 years; BMI: 27.3±3.3) and 25 matched controls (21 males, 4 females; age: 31.8±6.4 years; BMI: 27.2±2.6) were included. Three-dimensional head and pelvic COM displacement and velocities were collected at a 1.0 m/s standardized treadmill walking speed and assessed using Statistical Parametric Mapping t-tests. Maximum differences (dmax) between groups were reported for all significant kinematic findings. Results: The Vestibular group demonstrated significantly diminished anteroposterior head excursions (dmax=2.3 cm, p=0.02;) and slower anteroposterior (dmax=0.37 m/s, p=0.01), mediolateral (dmax=0.47 m/s, p=0.02) and vertical (dmax=0.26 m/s, p<0.001) velocities during terminal stance into pre-swing phases compared to the Control group. Vertical pelvic COM excursion was significantly increased in midstance (dmax=2.4 cm, p=0.03) and mediolaterally during pre- to initial-swing phases (dmax=7.5 cm, p<0.001) in the Vestibular group. In addition, Pelvic COM velocities of the Vestibular group were higher mediolaterally during midstance (dmax=0.19 m/s, p=0.02) and vertically during post-initial contact (dmax=0.14 m/s, p<0.001) and pre-swing (dmax=0.16 m/s, p<0.001) compared to the Control group. Significance: The Vestibular group demonstrated a more constrained head movement strategy during gait compared with Controls, a finding that is likely attributed to a neurological impairment of visual-vestibular-somatosensory integration.

scholarly journals Head and Body Dyskinesia During Gait in Tactical Athletes With Vestibular Deficit Following Concussion

2021 ◽  
Vol 3 ◽  
Author(s):  
John J. Fraser ◽  
Jacob VanDehy ◽  
Dawn M. Bodell ◽  
Kim R. Gottshall ◽  
Pinata H. Sessoms
Keyword(s):  
Walking Speed ◽  
Center Of Mass ◽  
Three Dimensional ◽  
Statistical Parametric Mapping ◽  
Neurological Impairment ◽  
Control Group ◽  
Initial Contact ◽  
Parametric Mapping ◽  
Movement Strategy ◽  
Vestibular Deficit

Background: Vestibular deficit is common following concussion and may affect gait. The purpose of this study was to investigate differences in head and pelvic center of mass (COM) movement during gait in military tactical athletes with and without concussion-related central vestibular impairment.Material and Methods: 24 patients with post-concussion vestibular impairment (20 males, 4 females; age: 31.7 ± 7.9 years; BMI: 27.3 ± 3.3) and 24 matched controls (20 males, 4 females; age: 31.8 ± 6.4 years; BMI: 27.2 ± 2.6) were included in the analyses. Three-dimensional head and pelvic displacement and velocities were collected at a 1.0 m/s standardized treadmill walking speed and assessed using Statistical Parametric Mapping t-tests. Maximum differences (dmax) between groups were reported for all significant kinematic findings.Results: The Vestibular group demonstrated significantly diminished anteroposterior head excursions (dmax = 2.3 cm, p = 0.02) and slower anteroposterior (dmax = 0.37 m/s, p = 0.01), mediolateral (dmax = 0.47 m/s, p = 0.02) and vertical (dmax = 0.26 m/s, p &lt; 0.001) velocities during terminal stance into pre-swing phases compared to the Control group. Vertical pelvic excursion was significantly increased in midstance (dmax = 2.4 cm, p = 0.03) and mediolaterally during pre- to initial-swing phases (dmax = 7.5 cm, p &lt; 0.001) in the Vestibular group. In addition, pelvic velocities of the Vestibular group were higher mediolaterally during midstance (dmax = 0.19 m/s, p = 0.02) and vertically during post-initial contact (dmax = 0.14 m/s, p &lt; 0.001) and pre-swing (dmax = 0.16 m/s, p &lt; 0.001) compared to the Control group.Significance: The Vestibular group demonstrated a more constrained head movement strategy during gait compared with Controls, a finding that is likely attributed to a neurological impairment of visual-vestibular-somatosensory integration.

Discipline and Sex Differences in Angle-specific Isokinetic Analysis in Elite Skiers

2019 ◽  
Vol 40 (05) ◽  
pp. 317-330 ◽  
Author(s):  
Marine Alhammoud ◽  
Baptiste Morel ◽  
Clint Hansen ◽  
Mathew Wilson ◽  
Regis Mecca ◽  
...  
Keyword(s):  
Statistical Parametric Mapping ◽  
Knee Extension ◽  
Current Data ◽  
Screening Methods ◽  
Full Extension ◽  
Isokinetic Testing ◽  
Parametric Mapping ◽  
National Team ◽  
Alpine Skiers ◽  
The Impact

AbstractStandard outcomes of traditional isokinetic testing do not detect differences between various muscle mechanical properties. This study i) explored a novel analysis throughout the range of motion based on statistical parametric mapping and ii) examined the impact of sex and discipline on hamstrings/quadriceps torque in elite alpine skiers. Twenty-eight national team skiers (14 females, 14 males; 14 technical, 14 speed) undertook an isokinetic evaluation of the knee flexors/extensors (range 30–90°, 0° representing full extension). There was no effect of sex (p=0.864, d=0.03) and discipline (p=0.360, d=0.17) on maximal hamstrings-to-quadriceps ratio and no effect of discipline on maximal torque (p>0.156, d≤0.25). Hamstrings torque and hamstrings-to-quadriceps ratio were lower in females than males toward knee extension only (p<0.05). Quadriceps torque was greater after 72° of knee flexion in technicians than downhill skiers (p<0.05). The current data showed that statistical parametric mapping analysis identified angle-specific differences that could not be evidenced when analyzing only maximal torques and reconstructed ratios. This may enhance screening methods to identify pathologic knee function or monitor rehabilitation programs, and inform sex- and discipline-specific training in alpine skiing.

Application of statistical parametric mapping to SPET in the assessment of intractable childhood epilepsy

2004 ◽  
Vol 31 (3) ◽  
pp. 369-377 ◽  
Author(s):  
Jason M. Bruggemann ◽  
Seu S. Som ◽  
John A. Lawson ◽  
Walter Haindl ◽  
Anne M. Cunningham ◽  
...  
Keyword(s):  
Statistical Parametric Mapping ◽  
Childhood Epilepsy ◽  
Parametric Mapping
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