Over the past a few years, I enjoy transforming my body through the exercise such as running, swimming and cycling in order to compete triathlon races. I have difficulty/ a hard time making time to train a lot/ hard.

Also, I'm conscious about my diet. Do you care about what you eat?

As for me all the food is really good for my exercise daily. Actually, I eat like a house. So, I have to be careful not to gain weight. 

because ≠ for:(前　理由を表す　(接　理由を付け足す

good for health

health benefit

Is there any food that you don't like especially Japanese one?

食べ物の好みがうるさい

be picky/choosy/fussy/particular about food

picky

I'm picky (with/about food). I'm picky eater. She is too picky.

食べ物の好みが贅沢な

with a dainty tooth

fine/lavish meals  上質で贅沢な食事

食べ物の好みが似ている