I never really cared much about exercise my entire life.  At age fifteen, I was only 5'11" and weighed 236 pounds.  I never did any strenuous activity which could be deemed as exercise.  I was about as out of shape as a fifteen year old could possibly be.  It was the summer of my sophomore year when I decided it was time to change my ways.  I dedicated the entire summer towards cleaning up my diet, getting proper aerobic exercise, and cutting back my calories.  In just one summer, I lost almost 70 pounds.  On a healthier diet, I was much thinner, more appealing, and full of more energy than ever before.  It was then I realized just how important fitting proper exercise into one's daily life really is.  I then decided to dedicate myself to researching other forms of exercise that would benefit my life even further.  I decided to take up weightlifting just last summer.  Not only did I have the resources to learn any exercise available to work a particular muscle of the body, I also had an understanding of how the muscle growth would take place from my studies in Biology II.  Since beginning my workout regimen, I have gained around fifteen pounds while maintaining a low body fat percentage.  Building up your physical strength, I feel, is just as important as building up your mental strength.  I now not only have the knowledge of healthy diet and exercise regimen but also have more strength than ever before.  Through this experience I have learned the importance of health.  I now plan on studying medicine as it is also an important factor in the well-being of people's lives.  By dedicating myself completely towards my goals, I have transformed from an obese kid who knew nothing about health to a man with a knowledge of health and the physique of a bodybuilder.  This accomplishment assures me that if I set my mind towards other goals such as learning medicine, I will succeed.