If you can't train 5 days a week, combine biceps with back and triceps with chest to cut it down to 4. One thing I would change with that routine though is to add squats on leg day. Do not only workout the muscles you think you'll use in rowing or whatever sport you're doing, a real athlete trains everything. Every muscle group is linked with each other, they all benefit (triceps with chest and shoulders, biceps with back, core with everything, legs with everthing).
Can't spot target fat unfortunately, you have to lose weight in general for it to go down. Old wives tale about doing crunches to lose belly fat, all ***.
Indeed. I've combined chest and tris, back and bis for years now in a 4 day split, works great. I didn't check that link, but the fact it doesn't have squats on it is going to prevent me from doing so.
Here is an example:
Day 1:
Shoulders/Abs
Arnold Press or military press 4-5 reps 75%-85% 1rm
Cleans 4-5 reps 75%-85% 1rm X5
Front raises 6-8 reps 55%-65% 1rm X4
Side raises 6-8 reps 55%-65% 1rm X4
Back flies 6-8 reps 55%-65% 1rm X4
Shrugs 6-8 reps 55%-65% 1rm X4
Back shrugs (ok to use smith machine) 6-8 reps 55%-65% 1rm X4
Situps (try to add weight on you chest) x10 X4
-Insert few fancy ab workouts here- (that little wheel thing with handles on it is a nifty little tool)
Day 2:
Back/Bis:
Seated rows 4-5 reps 75%-85% 1rm X5
Bent rows 4-5 reps 75%-85% 1rm X5
Deadlifts 4-5 reps 75%-85% 1rm X5
Lat pulldowns 4-5 reps 75%-85% 1rm X5
Barbell curls 4-5 reps 75%-85% 1rm X5
Alternating dumbell curls 6-8 reps 55%-65% 1rm X4
Concentration curls 6-8 reps 55%-65% 1rm X4
-Insert fancy bicep lift here (spider curls, preacher curls, standing overhead bicep cable curls, et al.)- 6-8 reps 55%-65% 1rm
X4
Day 3: Rest
Day 4:
Chest/tris
Barbell bench press 4-5 reps 75%-85% 1rm X5
Incline bench press 4-5 reps 75%-85% 1rm X5
Decline bench press 4-5 reps 75%-85% 1rm X5
Flies 6-8 reps 55%-65% 1rm X4
Dumbell tricep press 4-5 reps 75%-85% 1rm X5 6-8 reps 55%-65% 1rm X4
Cable tricep press (with bar) 4-5 reps 75%-85% 1rm
Cable tricep press (with rope) 4-5 reps 75%-85% 1rm
Overhead standing tricerp extension (with rope) 6-8 reps 55%-65% 1rm X4
-Insert fancy tricep lift (French press skullcrushers, dips, et al.)- 6-8 reps 55%-65% 1rm X4
Day 5:
Legs
Squats 4-5 reps 75%-85% 1rm X5
Leg press 4-5 reps 75%-85% 1rm X5
Leg extensions 4-5 reps 75%-85% 1rm X5
Good Mornings and/or stiff-leg deadlift 4-5 reps 75%-85% 1rm X5
Leg curls 4-5 reps 75%-85% 1rm X5
Calf raises 4-5 reps 75%-85% 1rm X5
-Insert fancy leg lift here- (box squats, lunges, side lunges et al.) 4-5 reps 75%-85% 1rm X5
(1rm = one rep maximum, what you could lift only once before failure.)
Day 6: Rest
If this is your first time lifting you may be incredably sore. Make sure you get some rest.
Diet is always key. Try to avoid soda. Say your prayers and eat your vitamins. Avoid smith machines. Smith machines add too
much outside stabilization and can promote injury. Some supplements I recommend are protein shakes, BCAAs, creatine (regular creatine monohydrate works for me, others swear by some fancy creatine formulas), geranium/yohimbine/caffeine if trying to cut,
fish oil, and ephedra if you are trying to cut and don't care about your sex life (if you are male). Don't ever put anything
into your body unless you are exactly sure of what it is, what it does, and how it may affect you.
For the fancy lifts, you can pretty much google "bicep workouts" and find 100 different variations on 100 different kinds of lifts.
Squats, deadlifts, and leg presses are psychologically good lifts too, as you will be able to do a lot of weight versus other lifts.
This is just an example, there are tons of other schemes (5x5, westside, favorite actors workout) to try; try to experiment and see which works best for you.