Intro: ( this is a discuss essay, so you can give a general statement about the two opinions)
Paragraph 1: Give examples of games where fitness and strength is very important for success – rugby, soccer, wrestling, volley ball.
Paragraph 2: Give examples of games where players can succeed with positive mental attitude and good game plan. Cricket – Indian player Sachin Tendulkar is very short, yet he can do wonders with his bat. Anil Kumble is one of the best bowlers in the game of cricket. He can read the mind of the batsman opposite him and that’s why he could take 10 wickets in one match. In Hockey too, winning depends on teamwork, attitude and co-operation.
Paragraph 3: Give other examples where players have reached pinnacles of sports career inspite of severe physical limitation. Swimmer Amy Dyken suffered from asthma but went on to win 4 gold medals in Olympics. Jeff Blatnick suffered from cancer, but won gold medal in Roman wrestling in 1984. Simon Keith had a heart transplant but still he plays soccer.
Conclusion: No doubt physical fitness and strength have a role but mental attitude is also very important.