Anything and everything in life zeroes down to the fitness . The more fit you are, the more better you do things and the more better you are projected to people.Of course fitness can be physical, mental or measured by any other means as suitable and required by the selection panel in a job for instance.To survive the competition, being physically fit is equally important.For that, I would suggest you to have a look at the Kettlebell and know how exactly people are getting fit with them.