Pelvic step: The contribution of horizontal pelvis rotation to step length in young healthy adults walking on a treadmill (original) (raw)
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Pelvis motion characteristics in case of induced gait perturbation in male and female adults
Advances in Rehabilitation, 2019
Introduction: Falls are a serious social problem. The risk of falling is higher for women compared to the male population, which may be resulting from differences in anatomy of the pelvis. Even though there are papers describing pelvis reaction to perturbation differentiating males and females, the perturbation is usually applied in standing position. The study's aim was to compare selected values describing the pelvis motion while gait perturbation and normal walking, having regard to sex differences. Material and methods: The study group included 43 young healthy adults (27 women and 16 men) aged 23±4 years. Motek Grail system was used to record the position of reflective markers placed on subjects' body. Gait perturbation (trip) was induced by decelerating one of the belts of the treadmill integrated with the system. Three-dimensional kinematic parameters for the left leg stance phase, when the perturbation occurred, and the next stance phase of the contralateral leg was analyzed. Statistical analysis was conducted in STATISTICA software using a two-way analysis of variance and Pearson correlation. Results: Statistically significant differences between gait and perturbation were found for each of the analyzed planes. It was also observed that gender influenced the results. Females had greater maximum pelvic tilt and greater rotation to the right compared to men, both for gait and perturbation. Conclusions: Based on the obtained results it can be suggested that differences in the anatomy and biomechanics of the pelvis between male and female may be the reason of higher risk of falling while walking in women compared to the men.
Technology and Health Care, 2017
BACKGROUND: Treadmills are used frequently in rehabilitation enabling neurologically impaired subjects to train walking while being assisted by therapists. Numerous studies compared walking on treadmill and overground for unperturbed but not also perturbed conditions. OBJECTIVE: The objective of this study was to compare stepping responses (step length, step width and step time) during overground and treadmill walking in a group of healthy subjects where balance assessment robots applied perturbing pushes to the subject's pelvis in sagittal and frontal planes. METHODS: During walking in both balance assessment robots (overground and treadmill-based) with applied perturbations the stepping responses of a group of seven healthy subjects were assessed with a motion tracking camera. RESULTS: The results show high degree of similarity of stepping responses between overground and treadmill walking for all perturbation directions. Both devices reproduced similar experimental conditions with relatively small standard deviations in the unperturbed walking as well as in perturbed walking. CONCLUSIONS: Based on these results we may conclude that stepping responses following perturbations can be studied on an instrumented treadmill where ground reaction forces can be readily assessed which is not the case during perturbed overground walking.
Age-related differences in pelvic and trunk motion and gait adaptability at different walking speeds
Journal of Electromyography and Kinesiology, 2015
Gait Kinematics Old Rigid and flexible behavior a b s t r a c t This study aimed at investigating age-related changes in gait kinematics and in kinematic adaptations over a wide range of walking velocities. Thirty-four older adults and 14 younger adults walked on a treadmill; the treadmill velocity was gradually increased in increments of 0.2 miles/hour (mph) (1.1-1.9 mph) and then decreased in the same increments. Pelvic, trunk, upper limbs and lower limbs angular total ranges of motion (tROM), stride time, stride length, and step width were measured. The older adults had lower pelvic, trunk tROM and shorter strides and stride time compared with the younger adults. As the treadmill speed was gradually increased, the older adults showed an inability to change the pelvic list angular motions (3.1 ± 1.3°to 3.2 ± 1.4°) between different walking velocities, while the younger adults showed changes (5.1 ± 1.8°to 6.3 ± 1.7°) as a function of the walking velocity. As the walking velocity increased, the older adults increased their stride length (from 57.0 ± 10 cm to 90.2 ± 0.1 cm) yet stride times remained constant (from 1.17 ± 0.3 sec to 1.08 ± 0.1 sec), while the younger adults increased stride length and reduced stride times (from 71.4 ± 10 cm to 103.0 ± 7.9 m and from 1.45 ± 0.2 sec to 1.22 ± 0.1 sec, respectively). In conclusion, the older adults were unable to make adaptations in pelvic and trunk kinematics between different walking speeds (rigid behavior), while the younger adults showed more flexible behavior. Pelvic and trunk kinematics in different walking speeds can be used as variables in the assessment of gait in older adults.
Effect of Tibial Length Discrepancy on the Pelvic List During Human Gait
International Journal of Current Research and Review, 2021
Introduction: Tibial length discrepancy (TLD) is an anatomical leg length discrepancy in which tibia length differs in the same individual. Current literature has not documented the TLD as the source of discrepancy for studying the biomechanics of walking. Instead of TLD studies have considered the total leg length discrepancy for studying the biomechanics of walking. Objective: The objective of the study was to investigate the motion of the pelvis in the frontal plane during walking with various degrees of TLD. Settings and Design: Musculoskeletal modelling Material and Methods: The study used the Stanford-based software (Opensim) in which several levels of TLD were manipulated to a generic musculoskeletal model of gait and subsequently the simulations were carried out using the inverse kinematics tool. A data set of the pelvic lists during a complete gait cycle was generated which was exported to the database for statistical operations. Statistical Analysis Used: Mann Whitney’s U ...
Sensors
Optoelectronic motion capture systems are considered the gold standard for measuring walking and running kinematics parameters. However, these systems prerequisites are not feasible for practitioners as they entail a laboratory environment and time to process and calculate the data. Therefore, this study aims to evaluate the validity of the three-sensor RunScribe Sacral Gait Lab™ inertial measurement unit (IMU) in measuring pelvic kinematics in terms of vertical oscillation, tilt, obliquity, rotational range of motion, and the maximum angular rates during walking and running on a treadmill. Pelvic kinematic parameters were measured simultaneously using an eight-camera motion analysis system (Qualisys Medical AB, GÖTEBORG, Sweden) and the three-sensor RunScribe Sacral Gait Lab™ (Scribe Lab. Inc. San Francisco, CA, USA) in a sample of 16 healthy young adults. An acceptable level of agreement was considered if the following criteria were met: low bias and SEE (<0.2 times the between...