The balance test was performed using the Libra board
on the lateral plane in three stance positions, including
bipodalic and monopodalic (both left and right) positions.
Three trials per position were executed, with each position
held for 30 s and a rest of 30 s between successive trials.
The mean result of the three trials was used as the test
outcome. The Libra board software returns the outcomes in
arbitrary units. The scores range between 0 and 100, and
the better results are closer to 0. The same instrument and
the same protocol have been used in other studies