+
+
+
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.
+
+
+
+
+
+
+
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
+
+
+
+
+