A comparison of kinetics in the lower limbs between baseball tee and pitched ball batting

Ae, Kazumichi; Koike, Sekiya; Fujii, Norihisa; Ae, Michiyoshi; Kawamura, Takashi; Kanahori, Tetsuya

doi:10.1016/j.humov.2018.07.010

Cited by 12 publications

(11 citation statements)

References 22 publications

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“…Each person has his/her own inherent pattern for walking, using different postural, neuromuscular, locomotor, and dynamic balance control. Some studies [44][45][46] showed there were different patterns for healthy people and many others differed under some pathological condition. Moreover, these patterns depended on external parameters such as velocity and contact surfaces.…”

Section: Discussionmentioning

confidence: 99%

ALICE: Conceptual Development of a Lower Limb Exoskeleton Robot Driven by an On-Board Musculoskeletal Simulator

Cardona

Cena

Serrano

et al. 2020

Sensors

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Objective: In this article, we present the conceptual development of a robotics platform, called ALICE (Assistive Lower Limb Controlled Exoskeleton), for kinetic and kinematic gait characterization. The ALICE platform includes a robotics wearable exoskeleton and an on-board muscle driven simulator to estimate the user’s kinetic parameters. Background: Even when the kinematics patterns of the human gait are well studied and reported in the literature, there exists a considerable intra-subject variability in the kinetics of the movements. ALICE aims to be an advanced mechanical sensor that allows us to compute real-time information of both kinetic and kinematic data, opening up a new personalized rehabilitation concept. Methodology: We developed a full muscle driven simulator in an open source environment and validated it with real gait data obtained from patients diagnosed with multiple sclerosis. After that, we designed, modeled, and controlled a 6 DoF lower limb exoskeleton with inertial measurement units and a position/velocity sensor in each actuator. Significance: This novel concept aims to become a tool for improving the diagnosis of pathological gait and to design personalized robotics rehabilitation therapies. Conclusion: ALICE is the first robotics platform automatically adapted to the kinetic and kinematic gait parameters of each patient.

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Section: Discussionmentioning

confidence: 99%

ALICE: Conceptual Development of a Lower Limb Exoskeleton Robot Driven by an On-Board Musculoskeletal Simulator

Cardona

Cena

Serrano

et al. 2020

Sensors

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“…A lab setting brings limitations that should be noted. First, it is hard to replicate true game-effort swings without in-game competition [46]. However, the first swings taken in a rehabilita- tion setting will probably not be at game-effort.…”

Section: Discussionmentioning

confidence: 99%

Knee Kinetics in Baseball Hitting and Return to Play after ACL Reconstruction

et al. 2020

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The purpose of this study was to describe the knee kinetics of baseball hitting, develop a tool to predict knee kinetics from easily obtainable measures, and to compare knee kinetics to other exercises along the rehabilitation continuum to determine a timeline for when hitting may resume after ACL reconstruction. Nineteen high school baseball athletes (16.3±0.8 yrs, 180.6±5.7 cm, 78.4±10.8 kg) participated. Participants took ten swings off a tee. Kinetic data were recorded using an electromagnetic tracking system. Data from swings with the top three exit velocities were averaged for analysis. Linear regressions were used to determine if predictors of height, mass, age and exit velocity could predict the following torques: bilateral knee net, extension, internal and external rotation, valgus and varus torque; and anterior force. Backwards regression models revealed independent variables could significantly predict front knee net, internal and external rotation, extension, and varus torque, and anterior force; and back knee net and valgus torque. Based on the kinetics of baseball hitting compared to those of rehabilitation exercises, if the involved knee is the front, we suggest tee hitting may be initiated at 13 weeks after ACL reconstruction. If the involved knee is the back, we suggest tee hitting may initiated at 17 weeks after ACL reconstruction.

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“…Determining the optimal movement patterns of the upper body could increase of the bat-head speed whilst maintaining the movement of the lower body. The lower body however contributes to the rotational movement of the body and adjustment of the swing timing (K. Ae et al, 2017Ae et al, , 2018Escamilla et al, 2009b;Welch et al, 1995). It is therefore necessary to approach a simulation analysis incorporating the lower body in further research to investigate the optimal movements of the whole body in baseball batting.…”

Section: Discussionmentioning

confidence: 99%

“…A single trial of each participant was selected from the successful trials for the development of the standard motion. The successful trials were judged by several criteria (K. Ae et al, 2017Ae et al, , 2018Ae et al, , 2020; including hitting the ball in a line drive towards a target (1.4 m × 0.7 m), the highest evaluation score of 4 or 5 (1, poor; 5, excellent).…”

Section: Data Collection and Processingmentioning

confidence: 99%

“…The bounds on the resulting bat Euler angle and optimised joint angles were allowed within ±2 standard deviations (SD) of the averaged data of all participants to avoid unrealistic movement patterns. In order to constrain the ball impact height and bat trajectory, the angle between the bat-head velocity vectors of the measured and optimised performance data was constrained to be less than 10 degrees, and difference of the impact point of the bat at ball impact less than 0.05 m. The ball impact point of the bat was assumed to be located at 0.15 m from the bat-head (K. Ae et al, 2018). Simulations exceeding the set bounds of the bat and joint angles and impact parameters were given a large penalty.…”

Section: Optimisationsmentioning

confidence: 99%

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Optimisation of the upper body motion for production of the bat-head speed in baseball batting

Burke

Kawamura

et al. 2020

Sports Biomechanics

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A comparison of kinetics in the lower limbs between baseball tee and pitched ball batting

Cited by 12 publications

References 22 publications

ALICE: Conceptual Development of a Lower Limb Exoskeleton Robot Driven by an On-Board Musculoskeletal Simulator

ALICE: Conceptual Development of a Lower Limb Exoskeleton Robot Driven by an On-Board Musculoskeletal Simulator

Knee Kinetics in Baseball Hitting and Return to Play after ACL Reconstruction

Optimisation of the upper body motion for production of the bat-head speed in baseball batting

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