Abstract:
:Two optimization techniques, static optimization (SO) and computed muscle control (CMC), are often used in OpenSim to estimate the muscle activations and forces responsible for movement. Although differences between SO and CMC muscle function have been reported, the accuracy of each technique and the combined effect of optimization and model choice on simulated muscle function is unclear. The purpose of this study was to quantitatively compare the SO and CMC estimates of muscle activations and forces during gait with the experimental data in the Gait2392 and Full Body Running models. In OpenSim (version 3.1), muscle function during gait was estimated using SO and CMC in 6 subjects in each model and validated against experimental muscle activations and joint torques. Experimental and simulated activation agreement was sensitive to optimization technique for the soleus and tibialis anterior. Knee extension torque error was greater with CMC than SO. Muscle forces, activations, and co-contraction indices tended to be higher with CMC and more sensitive to model choice. CMC's inclusion of passive muscle forces, muscle activation-contraction dynamics, and a proportional-derivative controller to track kinematics contributes to these differences. Model and optimization technique choices should be validated using experimental activations collected simultaneously with the data used to generate the simulation.
journal_name
J Appl Biomechjournal_title
Journal of applied biomechanicsauthors
Roelker SA,Caruthers EJ,Hall RK,Pelz NC,Chaudhari AMW,Siston RAdoi
10.1123/jab.2018-0332subject
Has Abstractpub_date
2020-07-14 00:00:00pages
1-20eissn
1065-8483issn
1543-2688pii
jab.2018-0332pub_type
杂志文章abstract::Low back pain is a common problem among competitive swimmers, and repeated torso hyperextension is claimed to be an etiological factor. The purpose of this study was to describe the three-dimensional torso configurations in the front crawl stroke and to test the hypothesis that swimmers experience torso hyperextension...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2015-0024
更新日期:2016-02-01 00:00:00
abstract::The goal of this pilot study was to characterize the effects of gait training on the capacity of muscles to produce body accelerations and relate these changes to mobility improvements seen in children with cerebral palsy (CP). Five children (14 years ± 3 y; GMFCS I-II) with spastic diplegic CP participated in a 6-wee...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2015-0311
更新日期:2016-10-01 00:00:00
abstract::The purpose of this study was to compare the fracture resistance and fracture mode of single implant-zirconium coping combinations using zirconium and titanium abutments and to analyze the stress distribution pattern using three-dimensional finite elements analysis. Twenty implants with titanium and zirconium abutment...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.28.4.394
更新日期:2012-08-01 00:00:00
abstract::In sweep-oar rowers, asymmetrical force production of the legs is a known phenomenon. The purpose of this study was to investigate the muscular activity of the legs that may cause this asymmetry even when oarsmen perform a symmetrical endurance task. Seven male young elite oarsmen performed an all-out 2000-m test on a...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.25.2.156
更新日期:2009-05-01 00:00:00
abstract::Maintenance of healthy bone mineral density (BMD) is important for preventing fractures in older adults. Strains experienced by bone in vivo stimulate remodeling processes, which can increase or decrease BMD. However, there has been little study of age differences in bone strains. This study examined the relative cont...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.29.5.505
更新日期:2013-10-01 00:00:00
abstract::The purpose of this study was to investigate age-related differences in muscle power during a surrogate task of trip recovery. Participants included 10 healthy young men (19-23 years old) and 10 healthy older men (65-83). The task involved releasing participants from a forward-leaning posture. After release, participa...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.22.3.186
更新日期:2006-08-01 00:00:00
abstract::Less than 50% of athletes pass criteria to return to sports (RTS) 6 months after ACL reconstruction (ACLR). Using data on 38 noncopers, we hypothesized that preoperative age, quadriceps strength index (QI), and knee flexion moments (KFM) during gait would predict the ability to pass/fail RTS criteria and that preopera...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章,随机对照试验
doi:10.1123/jab.28.4.366
更新日期:2012-08-01 00:00:00
abstract::This study aimed to compare head impact exposures between practices and games in football players ages 9 to 14 years, who account for approximately 70% of all football players in the United States. Over a period of 2 seasons, 136 players were enrolled from 3 youth programs, and 49,847 head impacts were recorded from 3...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2017-0207
更新日期:2018-10-01 00:00:00
abstract::The purpose of this study was to determine if children exhibit greater variability in center of mass movement and kinetics compared with adults in vertical jumping. Countermovement jumps with arms (CMJA) and without arms (CMJ) performed by 20 female children and 20 female adults were examined using force platform. The...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2014-0043
更新日期:2014-12-01 00:00:00
abstract::This study examined lower extremity joint moments during walk and turn with different turn angles and pivot feet. Seven young adults (age 21+/-1.3 yrs) were asked to walk at a self-selected speed (1.35+/-0.15 m/s) and to turn to the right using right (spin turn) and left (step turn) pivot feet at turn angles of 0 degr...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.22.1.74
更新日期:2006-02-01 00:00:00
abstract::Understanding upper limb strength requirements for daily tasks is imperative for early detection of strength loss that may progress to disability due to age or rotator cuff tear. We quantified shoulder strength requirements for 5 upper limb tasks performed by 3 groups: uninjured young adults and older adults, and olde...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2016-0116
更新日期:2017-12-01 00:00:00
abstract::Kinematic studies to date have not considered in what ways surface markers may affect the performance of the analyzed motion. This neglect is particularly apparent in studies of prehensile movements involving surface markers attached to the fingers. In order to specify any such effects, a range of kinematic parameters...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.23.4.315
更新日期:2007-11-01 00:00:00
abstract::The purpose of this study was to analyze the influence of varying running shoe midsole composition on lower extremity dynamics with and without a custom foot orthotic intervention. Three-dimensional dynamics were collected on 12 female runners who had completed 6 weeks of custom foot orthotic therapy. Participants com...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.25.1.54
更新日期:2009-02-01 00:00:00
abstract::This study investigated reliability of freehand three-dimensional ultrasound (3DUS) measurement of in vivo human Achilles tendon (AT) moment arm. Sixteen healthy adults were scanned on 2 separate occasions by a single investigator. 3DUS scans were performed over the free AT, medial malleolus, and lateral malleolus wit...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2016-0261
更新日期:2017-08-01 00:00:00
abstract::Investigations of joint loading in knee osteoarthritis (OA) typically normalize the knee adduction moment to global measures of body size (eg, body mass, height) to allow comparison between individuals. However, such measurements may not reflect knee size. This study used a morphometric measurement of the cartilage su...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2014-0249
更新日期:2015-12-01 00:00:00
abstract::Examinations of bone density changes in selected knee bone ends were evaluated prospectively in a randomized group of 28 patients, aged from 41 to 65 (mean: 55.3 years), who had varus deformations of their mechanic limb axes, mean 8 degrees. The examinations were conducted during the preoperative period, 10 days, 3, 6...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章,随机对照试验
doi:10.1123/jab.28.4.359
更新日期:2012-08-01 00:00:00
abstract::Motion of the femur and pelvis during hip flexion has been examined previously, but principally in the sagittal plane and during nonfunctional activities. In this study we examined femoral elevation in the sagittal plane and pelvic rotation in the sagittal and frontal planes while subjects flexed their hips to ascend ...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.26.3.290
更新日期:2010-08-01 00:00:00
abstract::The purposes of this study were to compare selected biomechanical variables before and after a long run, and to assess the relationship between weekly running volume and changes in lower limb biomechanics after the run. Twelve trained habitual rearfoot strike male runners ran overground before and after a treadmill lo...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2016-0170
更新日期:2017-07-01 00:00:00
abstract::The purpose of the present work was to study swimmers' efficiency during the underwater phase of the grab start. Eight high-level swimmers participated in this study. They performed two types of start: a regular grab start (with underwater leg propulsion after the glide) and a grab start with no underwater movement (s...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.26.4.501
更新日期:2010-11-01 00:00:00
abstract::Prolonged sitting has been associated with negative health effects. Walking workstations have become increasingly popular in the workplace. There is a lack of research on the biomechanical effect of walking workstations. This study analyzed whether walking while working alters normal gait patterns. A total of 9 partic...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2017-0124
更新日期:2018-10-01 00:00:00
abstract::Researchers conduct gait analyses utilizing both overground and treadmill modes of running. Previous studies comparing these modes analyzed discrete variables. Recently, techniques involving quantitative pattern analysis have assessed kinematic curve similarity in gait. Therefore, the purpose of this study was to comp...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.26.4.407
更新日期:2010-11-01 00:00:00
abstract::Volleyball players are at high risk of overuse shoulder injuries, with spike biomechanics a perceived risk factor. This study compared spike kinematics between elite male volleyball players with and without a history of shoulder injuries. Height, mass, maximum jump height, passive shoulder rotation range of motion (RO...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.29.2.155
更新日期:2013-04-01 00:00:00
abstract::The goal of this research was to analyze the effects of fatigue on the shock waves generated by foot strike. Twenty-two subjects were instrumented with an externally attached, lightweight accelerometer placed over the tibial tuberosity. The subjects ran on a treadmill for 30 min at a speed near their anaerobic thresho...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.14.3.300
更新日期:1998-08-01 00:00:00
abstract::We have developed a 2-D analytical biomechanical model for monoarticular open kinetic-chain exercises with lever selectorized equipment, and different relative placement between the joint center of rotation (J) and the center of rotation (C) of the resistance input lever ("off-center" exercises). All the relevant geom...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.26.1.73
更新日期:2010-02-01 00:00:00
abstract::The length of a muscle's moment arm can be estimated non-invasively using ultrasound, and the tendon excursion method. The main assumption with the tendon excursion method, however, is that the force acting on the tendon during passive rotation is constant. However, passive force changes through the range of motion, a...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2017-0263
更新日期:2018-01-24 00:00:00
abstract::The aim of this study was to determine the effects of pole length on energy cost and kinematics in cross country double poling. Seven sub-elite male athletes were tested using pole sets of different lengths (ranging between 77% and 98% of participants' body height). Tests were conducted on a treadmill, set to a 2% inc...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2016-0071
更新日期:2017-07-01 00:00:00
abstract::Elbow varus torque is a primary factor in the risk of elbow injury during pitching. To examine the effects of shoulder abduction and lateral trunk tilt angles on elbow varus torque, we conducted simulation and regression analyses on 33 college baseball pitchers. Motion data were used for computer simulations in which ...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.22.2.93
更新日期:2006-05-01 00:00:00
abstract::Glide efficiency, the ability of a body to minimize deceleration over the glide, can change with variations in the body's size and shape. The purpose of this study was to investigate the relationships between glide efficiency and the size and shape characteristics of swimmers. Eight male and eight female swimmers perf...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.28.4.400
更新日期:2012-08-01 00:00:00
abstract::The purpose of the study was to investigate the foot posture, ankle muscle strength, range of motion (ROM), and plantar sensation differences among normal weight, overweight, and obese individuals. One hundred and twenty-three individuals (42 normal weight, 40 overweight, and 41 obese) aged between 18 and 50 years par...
journal_title:Journal of applied biomechanics
pub_type: 杂志文章
doi:10.1123/jab.2020-0119
更新日期:2020-12-26 00:00:00
abstract::Use of a shank shell has been shown to estimate tibial transverse rotations better than skin-mounted markers. However, the day-to-day reliability of the transverse tibial rotations using an individually molded shank shell has not been previously investigated. This study examined the between-tests and trials reliabilit...
journal_title:Journal of applied biomechanics
pub_type: 临床试验,杂志文章
doi:10.1123/jab.21.2.198
更新日期:2005-05-01 00:00:00