As Totz pointed out, the lower the number of exercises the better the size gains over time simply because you take out a lot of the neural adaptation and put it into mucle building. I usually have programs with 4 to 6 exercises only. A typical program could be something like:
Squats/Deadlifts
Bench press/Dips
Chin up/Seated rows
Miltary press/Rear delts or shrugs
The slash means you can alternate exercises every other day or they can be used for a subsequent cycle or for a change after 6 months on one routine.
The weight should be increased every workout. The exception could be if you do a second 2 week cycle of 5's as you get more advanced before a SD. This is doable since the Repeated Bout Effect does not impact heavier weights as much as it does lighter weights. You can get plenty of benefit in the 3rd and 4th weeks of 5's even if you can only increase the weight once per week as more muscle fibers are being recruited with higher weights. Let your joints tell you if this is OK to do.
Fot the above program, I would recommend two sets of 15's, 3 sets of 10's and 4 sets of 5's. All can easily fit into a 40to 60 minute exercise period. If you feel the need, you can throw in
a set of curls and/or close grip bench presses at the end of each session to specifically target your arms but it is not really necessary.
The example above is just that, an example. Pick compound moves
you can do with the the strictest of form to stimulate muscle growth and to insure safety.
For the chins, you may need to use an assistance machine or power bands to hit 10 or 15 reps for a while. There is nothing wrong with that.
Most people choose 3 times per week (M, W, F) for covenience. Ideally your body would respond, regardless of age, in my opinion, to more:
M AM
T PM
W Off
TH AM
F PM
Sat Off
Sun AM
M PM
T Off
etc.
Under this high frequency scenario, Monday should be at, lets say 6:00 AM and Tuesday at 6:00 PM. 36 hours apart.
I already use a split AM/PM routine to keep my routines short to stay fresh so I settle for 4 times per week. Typically M,T Th, Sat. However there is nothing wrong with thrice per week and some research suggests twice per week may be as beneficial as thrice per week but I, personally, have not yet bought into that.
And eat like a MoFo. The more frequency the more food needed to build muscle. Good food! Emphasis protein, good fats and complex carbs. Restrict sugars and other simple carbs and bad fats.
O&G