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Slide show: Weight training exercises
By Mayo Clinic staff
Knee extension
The knee extension is an exercise you can do with an ankle weight to strengthen the quadriceps muscle in the front of your thigh.
Secure an ankle weight to your ankle. Then sit on a chair or weight bench, with your feet dangling in a relaxed position. Slowly straighten your knee, pause, and then return to the starting position. Repeat. Keep your movements smooth and controlled, and be careful not to snap or lock your knee into extension.
You can do the same exercise with a knee extension machine.
Next slide Previous slide- Jeffreys I. Warm-up and stretching. In: Baechle TR, et al. Essentials of Strength Training and Conditioning. 3rd ed. Champaign, Ill.: Human Kinetics; 2008:295.
- Pollock ML, et al. Resistance training for health. The President's Council on Physical Fitness and Sports. http://www.fitness.gov/resistance.pdf. Accessed March 1, 2010.
- Peterson DM. Overview of the benefits and risks of exercise. http://www.uptodate.com/home/index.html. Accessed March 1, 2010.
- Wilmore JH, et al. Principles of exercise training. In: Wilmore JH, et al. Physiology of Sport and Exercise. 4th ed. Champaign, Ill.: Human Kinetics; 2008:186.
- Earle RW, et al. Resistance training and spotting techniques. In: Baechle TR, et al. Essentials of Strength Training and Conditioning. 3rd ed. Champaign, Ill.: Human Kinetics; 2008:325.
- Harman E, et al. Administration, scoring, and interpretation of selected tests. In: Baechle TR, et al. Essentials of Strength Training and Conditioning. 3rd ed. Champaign, Ill.: Human Kinetics; 2008:249.

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