Self-Discipline in Sports

When it comes to playing sports, I lack self-discipline. I'm too active and competitive. When I play any sport, I play hard. I many not have all the skills, but I make it up by hustling and doing my best.

However, I need to discipline myself from playing any sport with people who don't know how to play. Too many times, I get hurt because I couldn't resist the temptation to exercise and compete. My aching joints can attest to my lack of discipline.

Like any negative thing that is tempting, I need to know when to be disciplined and make the wise decision.