This results in shortness of breath and pulmonary edema. Common causes of left-sided failure include the following: 1  Drinking too much alcohol. 2  Heart attack. 3  Heart muscle infections. 4  High blood pressure. 5  Hypothyroidism. 6  Leaking or narrow heart valves.
Â· just now. Report Abuse. Since you are trying to tone, do 2 or 3 sets of 12-15 reps. In other words, do 12-15 squats or leg presses, then rest 30 seconds to one minute, and repeat one or two more times. If you were trying to gain muscle mass, you would do less reps and more sets with a higher weight.
You should feel a good amount of resistance and pressure, but your movement should still be relatively fluid. A typical amount of weight used for a leg press is about two times your body weight. For example, a 130-pound woman would want to press about 260 pounds. While pressing double your body weight is a good goal, beginners may want to back off and build up to this weight.