Validation of power measurement techniques in dynamic lower body resistance exercises.

abstract：:The purpose of this study was to examine how wave-induced platform motion effects postural stability when handling loads. Twelve participants (9 male, 3 female) performed a sagittal lifting/lowering task with a 10 kg load in different sea conditions off the coast of Halifax, Nova Scotia, Canada. Trunk kinematics and f...

journal_title：Journal of applied biomechanics

authors： Duncan CA,Mackinnon SN,Albert WJ

更新日期：2012-05-01 00:00:00

abstract：:It is not known if a physically active lifestyle, without systematic training, is sufficient to combat age-related muscle and strength loss. Therefore, the purpose of this study was to evaluate if the maintenance of a physically active lifestyle prevents muscle impairments due to aging. To address this issue, we evalu...

journal_title：Journal of applied biomechanics

authors： Baroni BM,Geremia JM,Rodrigues R,Borges MK,Jinha A,Herzog W,Vaz MA

更新日期：2013-10-01 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

authors： Bohannon RW,Smutnick J

更新日期：2010-08-01 00:00:00

abstract：:This study aimed to investigate the effects of varying midsole hardness on center of pressure (COP) and perceived stability during basketball-specific tasks, as well as the correlation between COP and perception measurements. A total of 20 male basketball players performed 45° cutting and layup while wearing basketbal...

journal_title：Journal of applied biomechanics

authors： Leong HF,Lam WK,Ng WX,Kong PW

更新日期：2018-08-01 00:00:00

abstract：:A prolonged standing exposure can identify asymptomatic adults who have a higher risk of developing clinical low back pain later in life. Hip abductor cocontraction differences can predict low back pain development during standing exposures. This study's purpose was to determine if hip abductor strength, fatigability,...

journal_title：Journal of applied biomechanics

authors： Viggiani D,Callaghan JP

更新日期：2018-02-01 00:00:00

abstract：:The purpose of this study was to investigate muscle and tendon properties in highly trained sprinters and their relations to running performance. Fifteen sprinters and 15 untrained subjects participated in this study. Muscle thickness and tendon stiffness of knee extensors and plantar flexors were measured. Sprinter m...

journal_title：Journal of applied biomechanics

authors： Kubo K,Ikebukuro T,Yata H,Tomita M,Okada M

更新日期：2011-11-01 00:00:00

abstract：:Parkinson's disease (PD) and aging lead to gait impairments. Some of the disturbances of gait are focused on step length, cadence, and temporal variability of gait cycle. Under experimental conditions gait can be overtly evaluated, but patients with PD are prone to expectancy effects; thus it seems relevant to determi...

journal_title：Journal of applied biomechanics

authors： Robles-García V,Corral-Bergantiños Y,Espinosa N,Jácome MA,García-Sancho C,Cudeiro J,Arias P

更新日期：2015-06-01 00:00:00

abstract：:In animal models, hundreds of repetitions of upper extremity (UE) task practice promote neural adaptation and functional gain. Recently, we demonstrated improved UE function following a similar intervention for people after stroke. In this secondary analysis, computerized measures of UE task performance were used to i...

journal_title：Journal of applied biomechanics

authors： DeJong SL,Birkenmeier RL,Lang CE

更新日期：2012-07-01 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

authors： Floria P,Gómez-Landero LA,Harrison AJ

更新日期：2014-12-01 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

authors： Madigan ML

更新日期：2006-08-01 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

authors： Elipot M,Dietrich G,Hellard P,Houel N

更新日期：2010-11-01 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

authors： Janshen L,Mattes K,Tidow G

更新日期：2009-05-01 00:00:00

abstract：:Wrist splints are commonly prescribed to limit wrist motion and provide support at night and during inactive periods but are often used in the workplace. In theory, splinting the wrist should reduce wrist extensor muscle activity by stabilizing the joint and reducing the need for co-contraction to maintain posture. Te...

journal_title：Journal of applied biomechanics

authors： Domizio JD,Mogk JP,Keir PJ

更新日期：2008-08-01 00:00:00

abstract：:Our purpose was to characterize shoulder muscle volume and isometric moment, as well as their relationship, for healthy middle- aged adults. Muscle volume and maximum isometric joint moment were assessed for 6 functional muscle groups of the shoulder, elbow, and wrist in 10 middle-aged adults (46–60 y, 5M, 5F). ...

journal_title：Journal of applied biomechanics

authors： Saul KR,Vidt ME,Gold GE,Murray WM

更新日期：2015-12-01 00:00:00

abstract：:Isometric tasks have been a standard for electromyography (EMG) normalization stemming from anatomic and physiologic stability observed during contraction. Ballistic dynamic tasks have the benefit of eliciting maximum EMG signals for normalization, despite having the potential for greater signal variability. It is the...

journal_title：Journal of applied biomechanics

authors： Suydam SM,Manal K,Buchanan TS

更新日期：2017-07-01 00:00:00

abstract：:This preliminary study aimed to quantify the magnitude of the peak shoulder distraction force during the bowling action of female cricket fast bowlers. An eight camera Vicon motion analysis system operating at 120 Hz recorded the fast bowling actions of 18 Australian female fast bowlers. A three segment inverse soluti...

journal_title：Journal of applied biomechanics

authors： Stuelcken MC,Ferdinands RE,Ginn KA,Sinclair PJ

更新日期：2010-08-01 00:00:00

abstract：:The measurement of active drag in swimming is a biomechanical challenge. This research compared two systems: (i) measuring active drag (MAD) and (ii) assisted towing method (ATM). Nine intermediate-level swimmers (19.7 ± 4.4 years) completed front crawl trials with both systems during one session. The mean (95% confid...

journal_title：Journal of applied biomechanics

authors： Formosa DP,Toussaint HM,Mason BR,Burkett B

更新日期：2012-12-01 00:00:00

abstract：:When studying pathological gait it is important to correctly identify primary gait anomalies originating from damage to the central nervous and musculoskeletal system and separate them from compensatory changes of gait pattern, which is often challenging due to the lack of knowledge related to biomechanics of patholog...

journal_title：Journal of applied biomechanics

authors： Olensek A,Matjacic Z,Bajd T

更新日期：2005-11-01 00:00:00

abstract：:Virtual reality (VR) paradigms have proved to be a valid method to challenge and perturb balance. There is little consensus in the literature on the best protocol design to perturb balance and induce postural sway. Current VR interventions still lack a well-defined standardized metric to generate a virtual environment...

journal_title：Journal of applied biomechanics

authors： Sandri Heidner G,Rider PM,Mizelle JC,O'Connell CM,Murray NP,Domire ZJ

更新日期：2020-05-11 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

authors： Unver B,Selici K,Akbas E,Erdem EU

更新日期：2020-12-26 00:00:00

abstract：:Inertial measurement units (IMU) provide a convenient tool for gait stability assessment. However, it is unclear how various gait characteristics relate to each other and whether gait characteristics can be obtained from resultant acceleration. Therefore, step duration variability was measured in treadmill walking fro...

journal_title：Journal of applied biomechanics

authors： Rantalainen T,Hart NH,Nimphius S,Wundersitz DW

更新日期：2016-08-01 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

authors： Levinger P,Gilleard W,Coleman C

更新日期：2005-05-01 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

authors： Matsuo T,Fleisig GS

更新日期：2006-05-01 00:00:00

abstract：:The purpose of this study was to indicate the effect of fatigue on the underwater right arm stroke motion during the 100-m front crawl. The arm stroke motions of eight male competitive swimmers were captured three-dimensionally at 60 Hz in the positions of 15 m and 65 m from the start. The hand velocity, the arm angul...

journal_title：Journal of applied biomechanics

authors： Suito H,Ikegami Y,Nunome H,Sano S,Shinkai H,Tsujimoto N

更新日期：2008-11-01 00:00:00

abstract：:Anterior cruciate ligament (ACL) injury is one of the most common knee injuries among adolescent athletes. Majority of the ACL injuries occur due to pivoting, sudden deceleration, and direction change without contact with any player. Preventive interventions can reduce risks of the ACL injury, thus developing a clinic...

journal_title：Journal of applied biomechanics

authors： Eltoukhy M,Kuenze C,Oh J,Apanovitch E,Butler L,Signorile JF

更新日期：2019-02-01 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

authors： Bellamkonda S,Woodward SJ,Campolettano E,Gellner R,Kelley ME,Jones DA,Genemaras A,Beckwith JG,Greenwald RM,Maerlender AC,Rowson S,Duma SM,Urban JE,Stitzel JD,Crisco JJ

更新日期：2018-10-01 00:00:00

abstract：:In running, foot contact patterns (rear-, mid-, or forefoot contact) influence impact intensity and initial ankle and foot kinematics. The aim of the study was to compare impact intensity and its spatial distribution under the foot between different foot contact patterns. Forty-nine subjects ran at 3.2 m·s-1 over a le...

journal_title：Journal of applied biomechanics

authors： Breine B,Malcolm P,Segers V,Gerlo J,Derie R,Pataky T,Frederick EC,De Clercq D

更新日期：2017-12-01 00:00:00

abstract：:Although the lift force (F(L)) on a spinning baseball has been analyzed in previous studies, no study has analyzed such forces over a wide variety of spins. The purpose of this study was to describe the relationship between F(L) and spin for different types of pitches thrown by collegiate pitchers. Four high-speed vid...

journal_title：Journal of applied biomechanics

authors： Nagami T,Higuchi T,Nakata H,Yanai T,Kanosue K

更新日期：2016-04-01 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

authors： Mitchinson L,Campbell A,Oldmeadow D,Gibson W,Hopper D

更新日期：2013-04-01 00:00:00

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

authors： Du T,Narita I,Yanai T

更新日期：2016-02-01 00:00:00