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.
Step 2. Add leg presses to your routine, two or three times each week. Leg press machines are available at most gyms. Add the desired amount of weight to the machine, sit down, making sure to align your hips, shoulders, knees and feet. Slowly press the machine with your feet flat, but avoid locking your knees.