Lie back on a 24 inch fitness ball. Place your feet on the floor and your hands behind your head. Raise your shoulders 6 inches, then lower. Repeat for 2 sets of 15 repetitions. A learning curve takes place whenever an instructor introduces a new exercise or movement.
Movement is learned progressively.
Kinesthetic phase - the exerciser learns how the basic movement should be performed. In step aerobics, the basic foot patterns, such as single knee lifts and leg curls. Associative phase - the exerciser knows the basic movement and can add more to it. In step aerobics, the student may add arm movements to the basic foot patterns, or combine the basic foot patterns into more complex routines. Most fitness classes have participants who are in different phases in the same class.