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.
Do leg lifts. Leg lifts will strengthen and tone your thighs. Lie on the ground on your back. Slowly raise your legs until your body forms a 90 degree angle and then slowly lower your legs. Make sure that you are not using your hands to help you and that your legs are doing the work. Do about 20 reps of this a day.