FROM OUR EXPERTS
After a knee injury, exercise is very important. This is especially true when there's a torn or damaged anterior cruciate ligament (ACL). Knowing which muscles to work on is a major part of a successful rehabilitation process. Rehab specialists are teaming up with engineers to study muscle actions after injury. New technology makes it possible to measure joint movement and muscle strength. The dynamometer measures muscle strength in various positions and at different speeds. The arthrometer is used to measure joint laxity, a gauge of how "loose" a joint is. Joint laxity occurs when one bone slides too far over another. In the case of a torn ACL, laxity increases and can result in an unstable knee joint. Using measures of strength and laxity, researchers can compare people with normal knees to patients with ACL damage. These studies are ongoing. Patients with ACL deficiency have less strength in the quadriceps muscle on the front of the thigh. The hamstrings behind the thigh aren't usua...
Studies show muscle weakness after total knee replacement (TKR) is common months and even years after the surgery. This study compares the force produced during a single-leg press after TKR. Nine patients with TKR were compared to nine adults without TKR (the control group). This is the first study to measure force produced by the leg after TKR in a weight-bearing position. It's unique because force is examined across several joints using many muscle groups. This gives a better idea of what's going on in a fully weight-bearing position. Other studies have reported on forces in one joint at a time. Often only the knee extensor muscles are tested. The authors report that there is much less force through the leg with the joint replacement. These measures were lower when compared to the patient's healthy leg and when compared to the control group. This shows that the entire leg, not just one set of muscles, has less power. The researchers suggest that the loss of force in the leg with the TK...
Weakness is a lack of physical strength. Being weak may affect your balance and your ability to move around. You may feel you have to make more of an effort than usual to move your arms or legs. If you're feeling weak, you may find it harder to do your daily activities.
If you're weak, you also may feel tired and have:
trouble standing or sitting
loss of appetite
shortness of breath
Weakness can be caused by the following breast cancer treatments:
Arimidex (chemical name: anastrozole)
Aromasin (chemical name: exemestane)
Femara (chemical name: letrozole)
Evista (chemical name: raloxifene)
Fareston (chemical name: toremifene)
Faslodex (chemical name: fulvestrant)
Avastin (chemical name: bevacizumab)
Herceptin (chemical name: trastuzumab)
Tykerb (chemical name: lapatanib)
ovarian shutdown with Lupron (chemical name: leuprolide)
Weakness also can be caused by some pain medications, a...
You should know
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