You may consider being a healthy person, if you are physically fit. People perceive that a person is healthy, just by his/her appearance. In some cases it might be wrong; a physically fit person could be suffering from any disease related to the internal organs. Furthermore, mental health could also be a potential issue.

But why we forget that the psychological aspect of every human being is also a part of a normal human being. So when the person is physically fit but has mental disorders, can we call him healthy? According to world health organization, health includes the physical, mental and social well being.

In a balanced fitness program, strength exercise is important as well. You can call it resistance exercise because you are working against the muscles.
Resistance exercise can be done with weights or with rubber bands which you pull to extend and flex your muscles or with machines at the gym.

It is an exercise to build muscles, get more strength and prevent lose of muscles that comes with age. One of the greatest added benefits of strength exercise, especially for older people, is when the muscles get stronger, the person is more stable on his feet, thus can avoid falls and slips.