The body is a fragile thing. But through exercise it can become an impressive structure. Conditioning the senses, organs and muscles all together, can shape it to withstand what life puts the body through. From personal experience, I believe there is a great variety of results exercise can give you. First of all, it can change your appearance.
From there, when people feel they look good, they feel good and feel better about themselves. That self esteem carries on outward and can create a very positive surrounding, with friends and family. So overall, its a great benefit. But you also have to take into consideration that there are things that can hurt you. Sometimes too much exercise can do more harm than good, tiring the body and wearing down your natural energy.
Too much stress or mental unrest can break down even some of the strongest of people. So its good to educate yourself about exercise. Learn what works for you and what does not. That exercise of the mind may lead you to the greatest workout you can possibly have.