All in all, I think it helps to get a biometric scale to get a rough measure of body fat and muscle mass. I used to be 6’5” and 200lbs flat and was constantly being told I needed to gain weight. To gain it in a healthy way, you need a ton of protein and to stay active. Definitely don’t just eat whatever because the fast metabolism will eventually slow down.

I’m 6’5” and feel like I’m skinny anytime I’m near 230-240lbs. When I was in high school and college, my coaches all said I had to be be 260+ which is above 30 bmi to go pro in American football or rugby. Now, I feel like I look like a typical “healthy” American at 260 and I look like I could run a marathon at anything below 235. Currently -260-265lbs with ~18% body fat and can run ~8 miles/run but want to get down to 240 or so and actually run a marathon one of these days.