I'm new here, and really my main goal was to figure out exactly what I'm doing wrong to gain muscle. The regions that I've been working out have been my biceps, triceps, pectorals, and abdominals. Basically, I'm a 5'10 guy, weighing at around 125, and have been lifting solely 15 weight dumbbells for the last several months. Before I go into what I've been doing, my basic diet has been oatmeal (regularly) with whey protein, 2-3 glasses of milk a day (again, with whey protein), hamburger, chicken, and occasionally salmon when I can get it. I drink around 6 bottles of water a day (16.9 fl oz), and I try to snack on peanut butter and jelly sandwiches as well, and I eat before and after working out. Anyway, as far as working out though, I have two different schedules which I switch out every time I work out.
Schedule 1: 2 sets of dumbbell wrist curls (20 reps each), 3 sets of flat chest dumbbell bench presses (20 reps each), and 3 sets of alternating bicep curls (being 3 sets of 20 reps each arm)
Schedule 2: 3 sets of dumbbell wrist curls (20 reps each), 3 sets of alternating bicep curls (again, 3 sets of 20 reps for each arm), 100 sit-ups w/ singe dumbbell hugged against chest, and 50 alternating ab crunches.
I've always had an extremely high metabolism, so I figured that my problem can be one of four things. (1) I don't eat enough (being sort of a problem given current financial situation, but I eat what I can, and I try to eat as clean as possible), (2) some of the carbs I use are wasted during running (I run about 6 miles with what I estimate at around 30 lbs of gear on), (3) I need to lift more weight, or (4) I only lift 3-4 times a week, whereas I know some people lift every day.
Seriously, anything you guys can help me with would be awesome. I've been self-conscious about my weight for years now (17), and I've honestly been trying to fix that. I mean I feel better, I suppose I feel stronger (I haven't actually tested this), but I'm not putting on weight which means I'm obviously not putting on muscle. Again, anything you guys can suggest that might possibly help me would be great. Thanks.