The cause is frequently unknown. Hypertrophic cardiomyopathy is often and dilated cardiomyopathy in a third of cases, is inherited from a person's parents. Dilated cardiomyopathy may also result from alcohol, heavy metals, coronary heart disease, cocaine use, and viral infections.
Consider the number of reps. You can also confuse your muscles by increasing or decreasing the number of repetitions you do during any given exercise. For example, if you normally do 12 repetitions, do 15 or 18 repetitions, but with a lower weight than you would normally use.
Skip the Apple -- See Your Doctor. When you're obese and not used to strenuous exercise, don't get started without seeing your doctor. Tell him you want to start running to get fit. He's likely to perform a complete physical, checking your vital signs such as blood pressure and heart rate.