Ever been on a diet? I have and it worked so well but it was pretty annoying. It is the sum of food consumed by a person in another context.
I have tried to diet for fitness reasons, but it is a really hard routine to get into.
Diet (nutrition)
In nutrition, diet is the sum of food consumed by a person or other organism.
The word diet often implies the use of specific intake of nutrition for health or weight-management reasons (with the two often being related). Although humans are omnivores, each culture and each person holds some food preferences or some food taboos. This may be due to personal tastes or ethical reasons. Individual dietary choices may be more or less healthy.
Complete nutrition requires ingestion and absorption of vitamins
anticipated. 
Russell said it was not an easy decision. “I am really sorry for letting everyone down. I knew it was going to be very difficult leaving my kids but this was way more difficult than I can put into words. I want to thank everyone who worked so hard to get me to Thunder Bay; the Lakehead University Athletics Department, coaching staff, players, friends in Seattle, my Seattle coach and all the media who have been so kind to me. This was a tremendous opportunity for me