Core muscle endurance tests described by McGill et al.
(1999) were used to assess core stability. For the side
bridge test (SBT), subjects lay on their side with their legs
extended on a treatment table, resting on their forearm
with the elbow flexed to 90. Subjects were instructed to
lift the hip off the table with the other arm and hand across
the chest resting on the opposite shoulder. The test was
terminated when straight body position could no longer be
maintained. Time was recorded in seconds using a stopwatch.
For the abdominal fatigue test (AFT), the subjects
were seated with their back resting against a wedge that
maintained 45 flexion from the horizontal on the treatment
table.