You can improve your jumping height by doing a simple jumping exercise. Stand on an 8 inch high step and step off backward using both of your feet. When your toes hit the ground, jump forward back onto the step. The key is to press off as quickly as possible as soon as your toes hit the ground. Do at least three to five sets of 10-20 of these to improve the speed and height of your vertical jump.
Try exercising to reduce your overall cholesterol levels. Diet is enough to get them down to healthy levels, but you can get better and quicker results if you add exercising to your regimen. Generally, people who exercise have higher levels of HDL, or good cholesterol and lower levels of LDL, or bad cholesterol, than those who only eat a healthier diet.