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View article: Uncovering the hidden mechanics of upper body rotations in tennis serves using wearable sensors on Dutch professional players
Uncovering the hidden mechanics of upper body rotations in tennis serves using wearable sensors on Dutch professional players Open
Background It is assumed that the tennis serve is performed according to the kinetic chain principle in which a proximal-to-distal sequence in peak angular velocities of subsequent body segments can be observed to reach high end point ball…
View article: Testing for no effect in regression problems: A permutation approach
Testing for no effect in regression problems: A permutation approach Open
Often the question arises whether can be predicted based on using a certain model. Especially for highly flexible models such as neural networks one may ask whether a seemingly good prediction is actually better than fitting pure noise or …
View article: Predicting elbow load based on individual pelvis and trunk (inter)segmental rotations in fastball pitching
Predicting elbow load based on individual pelvis and trunk (inter)segmental rotations in fastball pitching Open
The baseball pitch is a repetitive, full-body throwing motion that exposes the elbow to significant loads, leading to a high incidence of elbow injuries. Elbow injuries in pitching are often attributed to high external valgus torques as th…
View article: Machine Learning Approach for Pitch Type Classification Based on Pelvis and Trunk Kinematics Captured with Wearable Sensors
Machine Learning Approach for Pitch Type Classification Based on Pelvis and Trunk Kinematics Captured with Wearable Sensors Open
The large stream of data from wearable devices integrated with sports routines has changed the traditional approach to athletes’ training and performance monitoring. However, one of the challenges of data-driven training is to provide acti…
View article: Pectoralis major activity prevents excessive horizontal abduction of the throwing arm in fastball pitching in baseball
Pectoralis major activity prevents excessive horizontal abduction of the throwing arm in fastball pitching in baseball Open
Background: In baseball pitching, repetitive excessive horizontal abduction of the upper (throwing) arm, or hyperangulation, can cause internal impingement to become pathological when glenohumeral contact intensity repeatedly reaches a thr…
View article: Testing for no effect in regression problems: a permutation approach
Testing for no effect in regression problems: a permutation approach Open
Often the question arises whether $Y$ can be predicted based on $X$ using a certain model. Especially for highly flexible models such as neural networks one may ask whether a seemingly good prediction is actually better than fitting pure n…
View article: Potential injury mechanisms in ulnar collateral ligament injuries; magnitude and variability of elbow load in repetitive baseball pitching
Potential injury mechanisms in ulnar collateral ligament injuries; magnitude and variability of elbow load in repetitive baseball pitching Open
A common overuse injury in baseball pitching is the Ulnar Collateral Ligament (UCL) injury, due to high and repetitive loading of the medial side of the elbow. This repetitive loading (i.e. external valgus torque), caused by pitching a hig…
View article: Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk—Do (catch-up) compensation strategies come into play?
Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk—Do (catch-up) compensation strategies come into play? Open
Background Baseball pitching performance can be mechanically explained by the summation of speed principle and the principle of optimal coordination of partial momenta. Impeding optimal energy generation or transfer by or between the pelvi…
View article: Energy flow through the lower extremities in high school baseball pitching
Energy flow through the lower extremities in high school baseball pitching Open
It is generally accepted that most of the energy transferred to the ball during a baseball pitch is generated in the trunk and lower extremities. Therefore, purpose of this study was to assess the energy flow through the lower extremities …
View article: Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk – Do (catch-up) compensation strategies come into play? (Dataset)
Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk – Do (catch-up) compensation strategies come into play? (Dataset) Open
Kinematic data (position data) of eleven baseball pitchers who performed 25 fastballs recorded with a VICON motion capture system. The pickle-files (version 4.0) contain the position data of a static anatomical reference posture ('STATIC')…
View article: Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk – Do (catch-up) compensation strategies come into play? (Dataset)
Fastball pitching performance only slightly decreases after mobility impediment of the pelvis and trunk – Do (catch-up) compensation strategies come into play? (Dataset) Open
Kinematic data (position data) of eleven baseball pitchers who performed 25 fastballs recorded with a VICON motion capture system. The pickle-files (version 4.0) contain the position data of a static anatomical reference posture ('STATIC')…
View article: Quantifying Within-Individual Elbow Load Variability in Youth Elite Baseball Pitchers and Its Role in Overuse Injuries
Quantifying Within-Individual Elbow Load Variability in Youth Elite Baseball Pitchers and Its Role in Overuse Injuries Open
Medial elbow overuse injuries are rising in baseball. The external valgus torque magnitude is a possible risk factor for medial elbow injuries. The magnitude on its own cannot explain why one pitcher sustains an injury and another does not…
View article: Establishing the Role of Elbow Muscles by Evaluating Muscle Activation and Co-contraction Levels at Maximal External Rotation in Fastball Pitching
Establishing the Role of Elbow Muscles by Evaluating Muscle Activation and Co-contraction Levels at Maximal External Rotation in Fastball Pitching Open
Background: Baseball pitching is associated with a high prevalence of ulnar collateral ligament injuries, potentially due to the high external valgus load on the medial side of the elbow at the instant of maximal shoulder external rotation…
View article: Individualised Ball Speed Prediction in Baseball Pitching Based on IMU Data
Individualised Ball Speed Prediction in Baseball Pitching Based on IMU Data Open
Ball velocity is considered an important performance measure in baseball pitching. Proper pitching mechanics play an important role in both maximising ball velocity and injury-free participation of baseball pitchers. However, an individual…
View article: The ulnar collateral ligament loading paradox between in-vitro and in-vivo studies on baseball pitching (narrative review)
The ulnar collateral ligament loading paradox between in-vitro and in-vivo studies on baseball pitching (narrative review) Open
Ulnar collateral ligament (UCL) weakening or tears occur in 16% of professional baseball pitchers. To prevent players from sustaining a UCL injury, it is important to understand the relationship between the UCL properties and elbow stabili…
View article: Are UCL Injuries a Matter of Bad Luck? The Role of Variability and Fatigue Quantified
Are UCL Injuries a Matter of Bad Luck? The Role of Variability and Fatigue Quantified Open
Upper extremity injuries are common in baseball. One of these is the ulnar collateral ligament (UCL) injury. In the field of sports injuries, most research focuses on average kinematics and kinetics between subjects, whereas focusing on wi…
View article: Effects of a Disturbed Kinetic Chain in the Fastball Pitch on Elbow Kinetics and Ball Speed
Effects of a Disturbed Kinetic Chain in the Fastball Pitch on Elbow Kinetics and Ball Speed Open
The purpose of the present study was to investigate the effect of an experimentally imposed kinetic chain disturbance in baseball pitching on ball speed and elbow kinetics. The experimental design consisted of two (within-subject) conditio…
View article: Knee Angle and Stride Length in Association with Ball Speed in Youth Baseball Pitchers
Knee Angle and Stride Length in Association with Ball Speed in Youth Baseball Pitchers Open
The purpose of this study was to determine whether stride length and knee angle of the leading leg at foot contact, at the instant of maximal external rotation of the shoulder, and at ball release are associated with ball speed in elite yo…