This file gives the time of liftoff for legs 2-4 during jumps. Leg 1 was always lifted well before the jump began. 

Columns:
subject: the trial, individual 1-12
leg: the leg in question, legs 2-4.
liftoff_time: the time at which the leg left the platform, in ms. Times are scaled such that 0 ms = peak acceleration for that trail
