Patellar alignment issues are common sources of knee pain. The patella, or kneecap, moves up and down as the knee bends and straightens. It moves on a "track" called the trochlear groove. When the kneecap doesn't move on the groove correctly, the condition is referred to as a patellar alignment (or tracking) problem.
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Electrical muscle stimulation -- often called "e-stim" or "TENS" -- is a type of treatment often used in physical therapy or other rehabilitation settings. The two primary uses for this treatment are pain relief and muscle re-education. In most settings, there is a machine that provides an electrical current.
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Obesity comes with its fair share of problems, a major one being back pain. While much of this can be due to the spine carrying excessive weight, some of the pain may be due to weakness of muscles around the area.
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Seeing people using the weight machines in the gym can be daunting - they all seem to know exactly what they're doing. One of the things you need to decide on is how many reps you're going to do per machine, and this all depends on the amount resistance selected or loaded onto the machine and your goals.
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Bikes and treadmills are both effective forms of cardiovascular exercise. Both come in a variety of sizes, brands and models, and both can come with adjustable settings for resistance, programs and times. Many models include pulse rate indicators on the handles.
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