21BW / Arena 
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  • ||||||||||  21BW / Arena
    Journal:  An Exploration of Machine-Learning Estimation of Ground Reaction Force from Wearable Sensor Data. (Pubmed Central) -  Dec 16, 2019   
    The model based on sacrum data was the most accurate single sensor model (unilateral landings: RMSE = 0.24 BW, r = 0.95; bilateral landings: RMSE = 0.21 BW, r = 0.98) with the refined model still showing good accuracy (unilateral: RMSE = 0.42 BW, r = 0.80; bilateral: RMSE = 0.39 BW, r = 0.92). Machine-learning models applied to wearable sensor data can provide a field-based system for GRF estimation during ballet jumps.
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    Clinical; Journal:  Biomechanics of the shoulder girdle: a case study on the effects of union rugby tackles. (Pubmed Central) -  Dec 6, 2017   
    Also, the strike force on the feet decreases for stability purposes. After performing multiple impacts the muscular activity of the trapezius and rotator cuff muscles decreases, which may lead, in the long-term, to instability of the shoulder and inefficiency of the scapulohumeral rhythm.
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    Journal; Preclinical:  EMG-driven Forward Dynamics Simulation to Estimate in Vivo Joint Contact Forces During Normal, Smooth, and Bouncy Gait. (Pubmed Central) -  Jun 8, 2017   
    The predicted medial, lateral, and total tibiofemoral forces represented the overall measured magnitude and temporal patterns with good root mean squared errors (RMSEs) and Pearson's correlation (?2). The model accuracy was high: medial, lateral, and total tibiofemoral contact force RMSEs = 0.15, 0.14, 0.21 body weight (BW), and (0.92< ?2<0.96) for normal gait; RMSEs = 0.18 BW, 0.21 BW, 0.29 BW, and (0.81< ?2<0.93) for smooth gait; and RMSEs = 0.21 BW, 0.22 BW, 0.33 BW, and (0.86< ?2<0.95) for bouncy gait, respectively.
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    Journal:  Ground reaction forces during steeplechase hurdling and waterjumps. (Pubmed Central) -  Sep 6, 2016   
    Vertical GRF peaks and video indicated rearfoot strikes on the treadmill but midfoot strikes during hurdle and waterjump landings. Potentially injurious GRF occur during the steeplechase, particularly during waterjump landings (up to 7.0 BW).
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    Journal:  Running speed increases plantar load more than per cent body weight on an AlterG® treadmill. (Pubmed Central) -  Mar 22, 2016   
    A table is presented with each of the 36 combinations of BW and running speed to allow a more objective progression of plantar loading during rehabilitation. Increasing running speed rather than increasing indicated per cent BW was shown to have the strongest effect on the magnitude of Fmax across the ranges of speeds and indicated per cent BWs examined.
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    Journal:  The Influence of Minimalist and Maximalist Footwear on Patellofemoral Kinetics During Running. (Pubmed Central) -  Mar 10, 2016   
    It was also revealed that patellofemoral force per mile was significantly larger in conventional (246.81 ± 53.21 BW) and maximalist (251.94 ± 59.17 BW) as compared to minimalist (227.77 ± 58.60 BW) footwear. As excessive loading of the patellofemoral joint has been associated with the aetiology of patellofemoral pain symptoms, the current investigation indicates that minimalist footwear may be able reduce runners susceptibility to patellofemoral disorders.
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    Journal:  Force production during maximal effort bend sprinting: Theory vs reality. (Pubmed Central) -  Aug 23, 2015   
    Also, the force requirements of bend sprinting are considerably different to straight-line sprinting and are asymmetrical in nature. Overall, bend-specific strength and technique training may improve performance during this portion of 200- and 400-m races.
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    Journal:  Effect of Acute Alterations in Foot Strike Patterns during Running on Sagittal Plane Lower Limb Kinematics and Kinetics. (Pubmed Central) -  Feb 28, 2015   
    This research also challenges the contention that the impact transient spike in the vertical ground reaction force curve is only present during a rear foot strike type of running gait. Key pointsFootstrike pattern changes should be individually considered and implemented based on individual histories/abilitiesForefoot strike patterns increase external dorsiflexion momentsRearfoot strike patterns increase external knee flexion momentsRecreational shod runners are able to mimic habitual mechanics of different foot strike patterns.
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    Journal:  Simulation of in vivo dynamics during robot assisted joint movement. (Pubmed Central) -  Aug 27, 2014   
    We developed and evaluated an algorithm for the robotic simulation of complex in vivo joint dynamics using a joint specimen. This should be a new biomechanical testing tool for analyzing joint properties after different treatments.