I weigh 130 and I'm 5'9 and perfectly healthy. Don't really have a great deal of muscle on me, though. I can lift my own body weight, which is what I consider important because myself is probably the heaviest shit I'm going to be needing to carrying anywhere. I'm able to carry any of my healthy weight family in case of emergencys. Other than that necessary stuff I don't care about strength. You could get lighter than me and still be healthy too, you'd just have to sacrifice a bit of strength.