Your quadriceps muscles, or thigh muscles, are used during knee extension. Having strong quadriceps muscles can increase your knee function and can prevent and reduce symptoms associated with osteoarthritis. Some exercises that can help strengthen...
Seated knee extension exercises are designed to help improve range of motion in your legs as well as reduce your risk of tearing a ligament in your knee joint. In addition, seated knee extension exercises will help you build muscle in your thighs...
Terminal knee extension exercises involve moving your knee muscles through a full range of motion and are frequently recommended by doctors and therapists after knee injury and surgery. Knee exercises are essential for restoring mobility and...
Limited hamstring flexibility reduces your range of motion during a knee extension. Your hamstrings are the muscle group located on the backs of your upper legs. The hamstrings attach your pelvis to your knees. When hamstrings contract, your knee...
A healthy child should be able to run, jump and play. If your child can't fully straighten his leg, he may have problems kicking a ball or climbing a jungle gym or may experience pain when he's active. Problems with knee extension often result...
There are many exercises that you can incorporate into your fitness program. Some are "multi-tasking" exercises because you work more than one muscle group at a time in a single exercise. You can also refer to some of them as functional...
Physical therapists and exercise physiologists have long debated the use of the leg extension machine. The concern mainly lies in damaging forces placed on the joints of the knee. The leg extension machine can be used safely but should not be the...
When you flex your foot up and extend your knee at the same time, you stretch the muscles and the fasciae that run from the bottom of your foot and up to your buttocks. This can help alleviate pressure in your hip that can cause sciatic pain,...
The quadriceps muscles, located in the front of the thigh, are the primary muscles used in knee and leg extension exercise equipment. These muscles are responsible for straightening or extending the knee joint; thus the name "leg extension...
The knee extension machine found in most gyms works the quadriceps, or the muscle on the front of your thigh. For many people, however, this exercise causes pain without providing the results you might wish. There are many alternatives that will...
Leg extension machines have been a staple of gyms for decades, and sometimes double as leg curl machines. Before using a leg extension machine, it's important to understand the intended function of the device, as well as who may benefit most from...
Bone, cartilage, muscles, ligaments and tendons come together to form your knees. Stress or damage to any of these body tissues can produce knee injuries. Knee injuries may produce swelling and pain within a few hours after a severe injury or more...
Knee arthritis is when the cartilage in your knee deteriorates, which causes pain and joint instability. Treatment includes resistance exercises such as leg extensions on machines, which strengthen your thigh muscles. However, performing leg...
A hyperetended knee is caused by excessive pressure that forces the knee backwards past its normal straightened position, according to MayoClinic.com. You may experience pain, bruising or swelling while recovering from a hyperextended knee injury....
If you elect to undergo knee replacement surgery, it's likely your condition has limited you from straightening your leg for some time, due to the added pressure on the knee joint. When you undergo knee replacement, it's normal to wonder if you...
Your knees have a big job supporting your body weight. The knee joint is the largest joint in your body and consists of four bones, four ligaments and the muscles of your quadriceps and hamstrings. Many fitness professionals and avid exercisers...
Strengthening the muscles that plantar flex your ankles, flex and extend your hips, and flex your knees requires your consistent participation in an appropriately-designed resistance-training program. Doing so will increase their force-production...
Leg extensions are a weight-training exercise that targets the quadriceps muscles located at the front of the upper thigh. A leg-extension machine is used, where you sit on a chair and lift a weight bar, using your quadriceps muscle. The lever leg...
Strength-training exercises, such as leg extensions, strengthen and tone specific muscle. Some strength exercises target several muscle groups, while other exercises, like leg extensions, target only one muscle group. Leg extension exercises...
Leg extensions work your quadriceps -- the group of four muscles on the front of your thighs. These muscles extend your knee joint. Every time you straighten your leg, your quadriceps are contracting. Your quadriceps are most active the closer...
To strengthen your knees you must strengthen the muscles that support them. The hamstrings and quadriceps are responsible for knee flexion and knee extension, the two ways in which your knees can move. Although the other muscles of yoru lower leg,...
Sprint running is extremely technical. It involves the use and coordination of your entire body. Olympic sprinters finely tune the biomechanics of their sprint running form for years to reduce their times by fractions of a second. There are four...
Shortening of the muscles and ligaments in your hips and knee is a common complication of transtibial amputation. Prolonged sitting in a wheelchair results in flexed hip and knee contracture. Active participation in your rehabilitation is...
The quadriceps muscles make up much of the anterior, or front side, of the thigh. The four muscles of the quadriceps are the rectus femoris, vastus lateralis, vastus intermedius and the vastus medialis. While the quadriceps muscles work in...
Range of motion, or ROM, is the amount of movement you have at each joint. ROM may decrease due to aging, injury or after exercise. Knee ROM exercises are designed to preserve flexibility and mobility and reduce stiffness of your knee, according...
It is imperative that you rest immediately after tearing a ligament in your knee, but eventually you must exercise it in order to recover fully. There are two ligaments in your knee, one on the outside and one on the inside. These are the anterior...
Weider Fitness makes home gyms so you can get your strength training workouts done without leaving your front door. There are a couple of different models, but they are similar enough that the classic exercises for your chest, back, shoulder, arms...
If completed properly, weight training helps tone and build muscles, as well as burn fat. The Mayo Clinic suggests warming up by stretching or walking for five to 10 minutes before beginning weight training exercises to avoid straining the...
The patella tendon connects the knee cap to the front of the tibia. The main function of the patella tendon is to act as a lever arm for the quadriceps. The patella tendon is prone to rupturing in individuals with a history of patella tendon...
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