Performance of 35m sprint by a youth basketball player done using standing start. Sample was collected by laser gun (CMP3 Distance Sensor, Noptel Oy, Oulu, Finland) and was sampled at a rate of 2.56 KHz. A polynomial function modeling the relationship between distance and time was employed and subsequently resampled at a frequency of 1,000 Hz using Musclelab™ v10.232.107.5298, a software developed by Ergotest Technology AS located in Langesund, Norway. Data was further modified by calculating raw acceleration using dv/dt (using smoothed velocity provided by the system), and then smoothed out using 4th-order Butterworth filter with a cutoff frequency of 1 Hz.
Usage
data(laser_gun_data)Format
Data frame with 6 variables and 4805 observations:
- time
Time vector in seconds
- distance
Distance vector in meters
- velocity
Smoothed velocity vector in m/s; this represent step-averaged velocity
- raw_velocity
Raw velocity vector in m/s
- raw_acceleration
Raw acceleration vector in m/s/s; calculated using difference in smoothed velocity divided by time difference (i.e., dv/dt method of derivation)
- butter_acceleration
Smoothed acceleration vector in m/s/s; smoothed out using 4th-order Butterworth filter with a cutoff frequency of 1 Hz