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  1. Article ; Online: Dorsiflexion shoes affect joint-level landing mechanics related to lower extremity injury risk in females.

    Garcia, Gina L / Caminita, Mia / Hunter, Jessica G / Miller, Ross H / Shim, Jae Kun

    Sports biomechanics

    2023  , Page(s) 1–15

    Abstract: Athletic shoes that induce dorsiflexion in standing can improve jump height compared to traditional athletic shoes that induce plantarflexion, but it is unknown if dorsiflexion shoes (DF) also affect landing biomechanics associated with lower extremity ... ...

    Abstract Athletic shoes that induce dorsiflexion in standing can improve jump height compared to traditional athletic shoes that induce plantarflexion, but it is unknown if dorsiflexion shoes (DF) also affect landing biomechanics associated with lower extremity injury risk. Thus, the purpose of this study was to investigate if DF adversely affect landing mechanics related to patellofemoral pain and anterior cruciate ligament injury risk compared to neutral (NT) and plantarflexion (PF) shoes. Sixteen females (21.65 ± 4.7 years, 63.69 ± 14.3 kg, 1.60 ± 0.05 m) performed three maximum vertical countermovement jumps in DF (-1.5°), NT (0°) and PF (8°) shoes as 3D kinetics and kinematics were recorded. One-way repeated-measures ANOVAs revealed peak vertical ground reaction force, knee abduction moment and total energy absorption were similar between conditions. At the knee, peak flexion and joint displacement were lower in DF and NT, while relative energy absorption was greater in PF (all
    Language English
    Publishing date 2023-03-22
    Publishing country England
    Document type Journal Article
    ISSN 1752-6116
    ISSN (online) 1752-6116
    DOI 10.1080/14763141.2023.2191867
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Roller Massage Prior to Running Does Not Affect Gait Mechanics in Well-Trained Runners.

    Hunter, Jessica G / Garcia, Gina L / Ranadive, Sushant M / Shim, Jae Kun / Miller, Ross H

    Journal of sport rehabilitation

    2021  Volume 30, Issue 8, Page(s) 1178–1186

    Abstract: Context: Understanding if roller massage prior to a run can mitigate fatigue-related decrements in muscle force production during prolonged running is important because of the association between fatigue and running-related injury.: Objective: The ... ...

    Abstract Context: Understanding if roller massage prior to a run can mitigate fatigue-related decrements in muscle force production during prolonged running is important because of the association between fatigue and running-related injury.
    Objective: The authors investigated whether a bout of roller massage prior to running would (1) mitigate fatigue-related increases in vertical average load rate and free moment of the ground reaction force of running and (2) mitigate decreases in maximal countermovement jump height.
    Design: Repeated-measures study.
    Setting: Laboratory.
    Participants: A total of 14 recreational endurance athletes (11 men and 3 women) volunteered for the study.
    Interventions: A 12.5-minute foam roller protocol for the lower extremities and a fatiguing 30-minute treadmill run.
    Main outcome measures: Vertical average load rate, free moment, and maximal jump height before (PRE) and after (POST) the fatiguing treadmill run on separate experimental days: once where participants sat quietly prior to the fatiguing run (REST) and another where the foam roller protocol was performed prior to the run (ROLL).
    Results: A 2-way multiple analysis of variance found no significant differences in vertical average load rate, free moment, and jump height between PRE/POST times in both REST/ROLL conditions.
    Conclusions: The authors concluded that recreational endurance athletes maintain running mechanics and jump performance after a fatiguing run regardless of prerun roller massage and may not rely on prerun roller massage as a form of injury prevention.
    MeSH term(s) Biomechanical Phenomena ; Exercise Test ; Female ; Gait ; Humans ; Lower Extremity ; Male ; Massage ; Running
    Language English
    Publishing date 2021-09-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1106769-x
    ISSN 1543-3072 ; 1056-6716
    ISSN (online) 1543-3072
    ISSN 1056-6716
    DOI 10.1123/jsr.2021-0055
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3780: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: Toward Soft Wearable Strain Sensors for Muscle Activity Monitoring.

    Alvarez, Jonathan T / Gerez, Lucas F / Araromi, Oluwaseun A / Hunter, Jessica G / Choe, Dabin K / Payne, Christopher J / Wood, Robert J / Walsh, Conor J

    IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society

    2022  Volume 30, Page(s) 2198–2206

    Abstract: The force-generating capacity of skeletal muscle is an important metric in the evaluation and diagnosis of musculoskeletal health. Measuring changes in muscle force exertion is essential for tracking the progress of athletes during training, for ... ...

    Abstract The force-generating capacity of skeletal muscle is an important metric in the evaluation and diagnosis of musculoskeletal health. Measuring changes in muscle force exertion is essential for tracking the progress of athletes during training, for evaluating patients' recovery after muscle injury, and also for assisting the diagnosis of conditions such as muscular dystrophy, multiple sclerosis, or Parkinson's disease. Traditional hardware for strength evaluation requires technical training for operation, generates discrete time points for muscle assessment, and is implemented in controlled settings. The ability to continuously monitor muscle force without restricting the range of motion or adapting the exercise protocol to suit specific hardware would allow for a richer dataset that can help unlock critical features of muscle health and strength evaluation. In this paper, we employ wearable, ultra-sensitive soft strain sensors for tracking changes in muscle deformation during contractions. We demonstrate the sensors' sensitivity to isometric contractions, as well as the sensors' capacity to track changes in peak torque over the course of an isokinetic fatiguing protocol for the knee extensors. The wearable soft system was able to efficiently estimate peak joint torque reduction caused by muscle fatigue (mean NRMSE = 0.15±0.03 ).
    MeSH term(s) Humans ; Isometric Contraction/physiology ; Knee Joint/physiology ; Muscle Fatigue/physiology ; Muscle Strength/physiology ; Muscle, Skeletal/physiology ; Torque ; Wearable Electronic Devices
    Language English
    Publishing date 2022-08-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1166307-8
    ISSN 1558-0210 ; 1063-6528 ; 1534-4320
    ISSN (online) 1558-0210
    ISSN 1063-6528 ; 1534-4320
    DOI 10.1109/TNSRE.2022.3196501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4726: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  4. Article ; Online: Fast Running Does Not Contribute More to Cumulative Load than Slow Running.

    Hunter, Jessica G / Garcia, Gina L / Shim, Jae Kun / Miller, Ross H

    Medicine and science in sports and exercise

    2019  Volume 51, Issue 6, Page(s) 1178–1185

    Abstract: Purpose: As running speed increases there are concomitant changes in loads associated with tibial stress fracture risk. Runners often include multiple speeds in their training, but the effect of speed distribution on load accumulation is unknown. We ... ...

    Abstract Purpose: As running speed increases there are concomitant changes in loads associated with tibial stress fracture risk. Runners often include multiple speeds in their training, but the effect of speed distribution on load accumulation is unknown. We studied how running at different proportions of speed within a given running distance affects the cumulative loading of the vertical average loading rate, cumulative peak absolute tibial free moment, and cumulative peak axial tibial load. These loads were compared between two proportions of speed: running all distance at normal self-selected speed, and running the same distance at a combination of slow/fast speeds with the same average speed as normal. Also, the contributions of slow and fast running to the combined condition were compared.
    Methods: Forty-three recreational runners (age, 18-49 yr; 29 female, 14 male) ran around a 50-m indoor track for three laps each at self-selected slow, normal, and fast speeds. Per-step peak loads and cumulative loads per kilometer were calculated at each speed and for each speed distribution, respectively.
    Results: Only cumulative vertical average loading rate was lower at normal speed compared with the slow/fast speed combination. The contribution of fast speed running to cumulative tibial load was less than the contribution of slow speed running.
    Conclusions: Running at a combination of slow and fast speeds, rather than a single moderate speed, increased cumulative vertical average loading rate but not cumulative tibial load or free moment. Fast running can be included in a training program without necessarily increasing the cumulative load. Total distance and average speed may not be sufficient information to estimate cumulative load from running training.
    MeSH term(s) Adolescent ; Adult ; Biomechanical Phenomena ; Female ; Fractures, Stress/physiopathology ; Humans ; Male ; Middle Aged ; Physical Conditioning, Human ; Running/physiology ; Tibia/injuries ; Tibia/physiology ; Time and Motion Studies ; Weight-Bearing ; Young Adult
    Language English
    Publishing date 2019-02-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 603994-7
    ISSN 1530-0315 ; 0195-9131 ; 0025-7990
    ISSN (online) 1530-0315
    ISSN 0195-9131 ; 0025-7990
    DOI 10.1249/MSS.0000000000001888
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 869: Show issues Location:
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  5. Article ; Online: Standardized Lab Shoes Do Not Decrease Loading Rate Variability in Recreational Runners.

    Hunter, Jessica G / Smith, Alexander M B / Sciarratta, Lena M / Suydam, Stephen / Shim, Jae Kun / Miller, Ross H

    Journal of applied biomechanics

    2020  Volume 36, Issue 5, Page(s) 340–344

    Abstract: Studies of running mechanics often use a standardized lab shoe, ostensibly to reduce variance between subjects; however, this may induce unnatural running mechanics. The purpose of this study was to compare the step rate, vertical average loading rate, ... ...

    Abstract Studies of running mechanics often use a standardized lab shoe, ostensibly to reduce variance between subjects; however, this may induce unnatural running mechanics. The purpose of this study was to compare the step rate, vertical average loading rate, and ground contact time when running in standardized lab shoes versus participants' normal running shoes. Ground reaction forces were measured while the participants ran overground in both shoe conditions at a self-selected speed. The Student's t-test revealed that the vertical average loading rate magnitude was smaller in lab shoes versus normal shoes (42.09 [11.08] vs 47.35 [10.81] body weight/s, P = .013), while the step rate (170.92 [9.43] vs 168.98 [9.63] steps/min, P = .053) and ground contact time were similar (253 [25] vs 251 [20] ms, P = .5227) and the variance of all outcomes was similar in lab shoes versus normal shoes. Our results indicate that using standardized lab shoes during testing may underestimate the loads runners actually experience during their typical mileage.
    Language English
    Publishing date 2020-07-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1145288-2
    ISSN 1543-2688 ; 1065-8483
    ISSN (online) 1543-2688
    ISSN 1065-8483
    DOI 10.1123/jab.2019-0337
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.B 2776: Show issues Location:
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