One of my favorite leg strengthening exercises for seniors has to be the lunge. In this exercise, simply stand with feet at hip width at the side of your kitchen chair, lightly resting one hand on the backrest. Take a comfortable step forward with your right leg, bend your right knee a little, then return to standing position. Repeat this 10 times with your right leg. Then step over the the left side of the chair and repeat 10 lunges on your left leg. Keep breathing during your exercise. Don’t step too far as this may cause your knee to falter and you will end up on the ground.