First, I don’t take any of this as arguing and it’s even fine as it is. None of this is exactly settled science and I don’t think any of our opinions is the authority. I’m sure the rest of this will just be a ramble.
To my earlier point, presses and pulls don’t really target the long heads of the triceps and biceps, respectively.
So this means those compound lifts “count,” but I don’t think it’s as simple as saying it’s a half set or whatever. Maybe you worked half the muscle group.
Now, you can definitely make cases against me. I’ll list a couple, but not go super deep in counterpoints:
Obviously you can get strong on compound lifts, avoid direct arm work, and still get big arms. Let’s just assume we’re talking about maximally developing your arms and I think we’re good here.
Certainly I understand the simplicity in saying “that was half a set,” and then it makes formulae relatively easy. As above, that works as a jumping off point, but you’ll have to dig a little deeper to blow out your shirt sleeves.
I agree arm work doesn’t need as many direct sets as the above, which helps us “fit” the 10-/0 set recommendations from papers if we count the compound movements as partial sets. I think it’s more likely they are simply smaller muscles with less strength potential. Not to mention, all the work goes to the target muscle in a curl; not so for the chest in a bench.
I also get the point that we can look at any anatomy chart and realize no muscle could ever act in isolation; the skeleton just won’t move that way. By the same token, let’s look for two seconds more and realize each muscle has its own unique insertion points; we do have to train those.
Now, on the other hand, trying to count half sets and the like creates some weird problems. If I do a dip, was that also only half a set for my chest? What if I use a close-grip bench on my arm day but a floor press on my chest day? Did I cancel everything out and do 0 sets? Honestly, I think Dante Trudel figured this one out by just saying to pick moves that bias your weak points while still working your intent. Like if you have bad triceps, do dips for a main chest movement. I recognize the irony in appealing to Doggcrapp to justify isolation movements.
So what’s my point?
- If you want to maximally develop your arms, you have to train them directly
- You can bias movements however you want, so creating a formula of what percentage of a muscle a set counts for is a bridge too far for me
- It’s fine that arms take fewer sets. It’s always been 9-12 for me
- Compound lifts do very well to train your triceps, as part of a complete program
- You won’t train your triceps long head without extension movements
- You won’t train your biceps long head without flexion (curls); the short head is not even maximally contracted in pulls (unless you’re choosing to not train your back with them)
Not specific to this discussion, but it touches it: I really believe in using the big barbell lifts to get stronger and “safer” movements to get bigger. So a push day could absolutely start with bench, to get all those muscles stronger, then I go to DB or machine presses for chest, and pressdowns or skullcrushers for triceps to get my hard reps in and get bigger.
In terms of the giant sets, what I think you’re saying is exactly how I use them. A lot of times I (well, usually others…) don’t like to train arms. We’ve got other goals, other stuff to do, etc. Like if I have a ton of fat to lose or I want to run my first 5k or whatever, does it make sense to use my limited time on an arm day? Probably not, but I may still want/ be motivated by some better arms. The giant sets can get you those 9 sets I mentioned above really quickly and truly take nothing out of you. I kind of have a 10-15 minute rule with add-on stuff: if there’s something you like to do, but it’s not in the plan, you get 15 minutes to do it; how much damage can you do in 15 minutes?
What are your thoughts?