汉译英：我打算在以后保持健康的饮食，并且养成每天都煅的好习惯，因为煅炼对我们青少年有好处

I have decided to keep a healthy diet in future,and develop a good habit of doing exercise every day,for doing exercise is good for teenagers.
希望这个翻译您会满意~

I intend at hereafter keep healthy food, and develop every day the good habit of Ya, because the Ya chain has advantage to our teenager

I decide to keep eating healthly, and develop a good habit of doing exercise everyday because exercise is good for our teenagers.
大概吧``

Because exercise is do good to the youth，I decide to have a health diet and a habit of doing exercise everyday.