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Beginning (grandma on left) – Start feet together with one foot on a paper plate or slider and the other foot on the ground. Slide the foot on the plate out to the side while keeping your sliding leg straight and lunging the leg on the ground as deep as you can, then slide back into standing/starting position.
Intermediate/Advanced (middle and left) – Hold a medium to heavy dumbbell and try to lunge at least to 90 degrees or deeper each time.