Health is 20% Exercise, 80% Diet?

Training
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Not for health. There’s a lot more to health than diet and exercise anyway. For body composition, yes it’s mostly diet, so if you want to lose fat you’ll have to improve your diet. I’ve never carried around excess body fat so I’m not going to say what you should do, because I don’t know. Using the search feature on T-nation.com will certainly help you get started!