Dataset title: Kinematics and ball velocity of baseball pitchers

Person responsible for data collection: Erik van der Graaff, e.vandergraaff@nazcasolutions.nl

File name: Data.csv

A csv file containing kinematics and ball velocity of baseball pitchers from the national U18 baseball team as well as six baseball academies in the Netherlands.

The measurements were performed at the indoor facilities of the academies. After warm-up, the pitcher was instructed to perform 10 fastballs with maximal effort towards a catcher sitting behind home plate. The pitching motion was recorded using two 9-DOF IMUs (MPU-9150, Invensense,72San Jose, CA, USA). Sensors were rigidly attached to pelvis and sternum using double-sided adhesive tape.  IMUs gyroscope recorded angular velocities continuously throughout the participants session. Using R 4.0.3 software, the peak angular velocity was calculated as its Euclidean norm. Each recording was manually segmented into parts containing only a single pitch. Segmentation was performed by plotting the entire gyroscope signal and locating the peaks, each corresponding to a pitch. The ball velocity (mph) reached during the pitches was measured from behind the home plate using a Stalker pro 2 radar gun (Stalker Radar, Plano, TX, USA). We coupled recorded ball speed with corresponding peak angular velocities during single pitch. The data set doesnt include missing values. 

Attributes: 

1. ID = The ID number assigned to the participant, starting with FB0 and a start number of the participant, such as FB036, FB037, FB038.
2. Age = Age of the participant in years.
3. Height = Height of the participant in cm.
4. Weight = Weight of the participant in kg.
5. BallSpeed = Ball speed in mph of the single fastball measured by Stalker pro 2 radar gun.
6. Pelvis = Peak angular velocity of pelvis in deg/s measured by IMU placed on pelvis.
7. Trunk = Peak angular velocity of trunk in deg/s measured by IMU placed on sternum.
