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.
Another method involves sitting down with a trainer at the leg press to find your maximum. To do this, warm up for five to 10 minutes. Rest for one minute. Seat yourself in the press and select a weight you can comfortably press three to fives times by adding 30 pounds to 40 pounds. Rest for two minutes.