While positioned on the floor, place the hands under the lower back. Both legs are bent, with feet flat on the floor. Engage the abdominals, bringing the belly button towards the floor. Lift the head and shoulders. Hold the position for three seconds, and slowly return to the starting position. Don't try to do a complete sit-up, as this can place added stress on your back. Concentrate on good form. The range of motion in this exercise is small. Do 8 to 12 reps, and work up to three sets.

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