Fitness is a must in any sport and just like in golf, it is one important factor that can really affect your game. But fitness isn't complete without talking about nutrition. So the answer is yes; nutrition is so important that you should never ignore. Giving your body enough food will make you durable during a full round of golf, and hopefully (if necessary) during some extra rounds. A lot of golfers doesn't give a bit of importance in terms of nutrition but if they do, some changes will take place and it will be always be better results.