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I am underweight. How do I gain weight and muscle?
I am a 18 yr old guy with height of 6 ft. I have had a thin body from my childhood. My weight is around 66 kg. Although I do not do much of exercise, but have to cycle around 6-8 km everyday. I do not want to become fat, but rather just wish to have a healthy and fit looking body. I take almost everything is my diet and there is no restriction in that. I wish if you could tell me a diet plan or the exercises that I may do to achieve the desired results. Thanks!