Im 6'2ish and weigh ~130lbs currently. I'm starting to think gaining weight would be a good idea as ive been at the same weight basically since I was 16-17. I'm 19 now. Eating more/bad food doesn't work for me, and id rather try to gain muscle mass than eat my heart out and gain fat haha. What would you recommend I start with to gain some muscle? I have good cardio. We have a bowflex, ab circle thingy haha, and a rowing machine, as well as a treadmill, eliptical, and stationary bike.
It wouldn't hurt for me to start strengthening my joints for ski season anyway, as I tend to injure my knees and upper body every year haha.