1. A computer-implemented method for decomposing a ground reaction force (GRF) into individual force profiles, comprising: receiving a time measurement of a global GRF measured while a subject having two support contacts for abutting a force platform performs at least one movement on the force platform, the movement comprising at least two motion configurations and each motion configuration being characterized by a respective number of said two support contacts being in physical contact with the force platform; identifying individual time regions contained in the time measurement of the global GRF and assigning a respective one of the at least two motion configurations to each time region using a logical order of motion configurations and an identification of a reference motion configuration, thereby identifying the motion configurations contained in the time measurement of the global GRF; for each time region, determining an individual GRF for each one of the two support contacts using the identification of the motion configuration for the time region, the time measurement of the global GRF, and one of an interpolation function and a parametric equation, the one of an interpolation function and a parametric equation being used to model an individual GRF of a first one of the two support contacts that takes off from the force platform, an individual GRF of a second one of the two support contacts being determined using the global GRF and the individual GRF of the first one of the two support contacts, thereby determining a contribution of each one of the at least two support contacts to the global GRF; and outputting the individual GRFs; said identifying individual time regions comprising determining single stance regions and double stance regions within the global GRF; said assigning comprising: assigning a first one of the two support contacts considered as being in contact with the force platform to a first single stance region and assigning the first one of the two support contacts to each subsequent odd single stance region; assigning a second one of the two support contacts considered as being in contact with the force platform to the second single stance region, the first one of the two support contacts being considered to be away from the force platform, and assigning the second one of the two support contacts to each subsequent even single stance region; and said determining an individual GRF comprising: for each odd single stance region, assigning a corresponding value of the global GRF to a force of the first one of the two support contacts and a substantially zero value to a force of the second one of the two support contacts; for each even single stance region, assigning a corresponding value of the global GRF to the force of the second one of the two support contacts and the substantially zero value to the force of the first one of the two support contacts; and for each double stance value, determining a first value for the force of the first one of the two support contacts and a second value for the force of the second one of the two support contacts, the sum of the first and second values being equal to the value of the global, thereby obtaining individual support force profiles.