I worked out in my 20s a good bit and got reasonably strong (360 deadlift, 315 squat, 250 bench at a bodyweight of 150) but then hurt my lower back in the Army. 15 years later I'm finally getting doctors to look into it—my doc thinks I tore a muscle and it never really healed right. No deadlifts for me, sad face.
Anyways, here's a before and after photo of me this year. I suck at photos, in case you can't tell, and I chopped all my hair off because my toddler went through a hair-pulling stage. But after years of not working out and not eating much (I've never had a big appetite) I was just a skinny guy. I went from 139 pounds to 168 at 5'7" this year. Gains like that took a very strict regimen, reading up on some scientific literature, and ignoring all bro science.
Also decided to get on finasteride after the picture on the right, because I'm 41 and tired of losing my hair. Goals are to maintain my current body fat of 9-10% percentage and get up to about 180, or even lose a pound of fat around my midsection, even better. I'm also kinda trying to do a fitness instagram but I keep forgetting to take pictures and videos haha. It can be tough since I can't do barbell squats or deadlifts due to my back (not only an injured muscle, but massive arthritis in my lower back and other places due to my Army years) but I make do. Lots of bodyweight squats and lunges. I miss deadlifting, though. That was always my favorite lift.
I did a push/pull/legs split for a while and really liked it. Recently I've switched to this split:
Day 1: Chest/back. Flat barbell bench press, narrow grip pulldowns, incline dumbbell bench press, bent over dumbbell rows. Maybe some weighted wide grip pullups or dips at the end, or dumbbell flyes.
Day 2: Shoulders/Arms. Standing overhead press (harder on my lower back but I love the exercise) or seated dumbbell press, lateral dumbbell raises. I try to superset my biceps and triceps. I have some elbow issues so I can't do french press or skull crushers, so I do different variations of triceps pushdowns and alternate with EZ bar curls and dumbbell hammer curls. Sometimes I'll do a set of curls to exhaustion and then immediately do some chinups.
Day 3: Legs. If I were coaching someone else, i would tell them to start this day with heavy barbell squats. I can't do those any longer, so I've had to be inventive to keep my legs strong and healthy. Sometimes I'll do squats anyway, but I do it with only the bar (45lbs) or just with 25s on each side (95lbs). Even with that, my lower back will ache for the rest of the day. I hate the leg press and find it to be somewhat worthless, but sometimes I'll do a couple 20-rep sets on it. Usually I do high-rep sets of bodyweight squats, or lunges with my front leg up on a pedestal/block/platform. After that, lying hamstring curls.
I tend to work my calves every day/every other day. I do both standing and seated calf raises and focus on a full range of motion—I go down until I'm in a deep stretch, then flex all the way on top and hold it for a second. I don't have large calves, but I started with toothpicks and crap genetics and I've built up decently muscular calves. They're tough muscles and require hard workouts to grow. Most people use too much weight and don't use a full range of motion or enough intensity and volume. That's why their calves don't grow.
Abs I do here and there. To be honest I'm a bit lazy with my abs. I'm trying to be better about that, but my back hurts with most ab workouts so it can be tough. L-pullups and hanging leg raises are some of my gotos, or just a bunch of boring crunches. I might try using rings to do leg lifts, just to make it more difficult.
A few times a week I toss in 10-15 minutes of high intensity cardio after a workout. Trying to keep my heart healthy, as that's the only muscle that really counts. I'd do more, but I'm very limited on time.
Diet: Here is the reason I've made such great progress. I'm a vegetarian and eat only a little cheese and some eggs/egg whites here and there, everything else is plant based. Every morning I make a shake with peanut butter and bananas and other goodness, and it comes out to 750 calories and 50 grams of protein. At 11am, I have my first lunch: usually a peanut butter and banana sandwich on ezekiel bread, or mayo/mustard/tomato/spinach/cheese/vegan deli slices. Either way, I try to get about 6-700 calories and 30 grams of protein. at 2PM I usually have leftovers from the night before, and I shoot for similar numbers, about 700 calories and 30-40 grams of protein. I workout after work, then go home and eat dinner. Same thing, 700 calories and a decent amount of protein. If I've been low on calories that day, I'll make another shake with a banana and blueberries and peanut butter around 8PM. I'm slowly ramping up my calories, and once I surpass 170 pounds my focus will be on eating 3,000 healthy calories per day. I can't really add any more protein or I won't be hungry enough to eat all that food.
I try to get 8 hours of sleep, but with a toddler that's nearly impossible. Try to stay positive and happy, and my wife and I have a very active sex life, which helps maintain good hormone levels. Stay hydrated, too. Only supplements are a few grams of creatine per day when I remember, vitamin D, finasteride for hair loss, multivitamin, and biotin (really trying to get my hair to grow haha). Thinking of adding a ZMA supplement to help with sleep.
In my earlier years I was always focused on being as strong as possible, and I got pretty strong ( could row 130lb dumbbells all day) but now that I'm 41 and everything hurts I'm trying to lift smarter, not harder. I pay attention to things like time under tension, which is extremely important in muscle growth. Each rep has a forceful contraction, hold at the end for one second, then let it down slowly. Less weight, higher reps, better workouts. My muscles grow more and my joints are happier.