Why not? there a small muscle and recover quickly.
I see abs (in my case) in a way that almost mimic my calfs. I mean i use my abs more than normal people(mountain bike, discus/hammer) and it takes a lot for me to break them down. Plus there a small muscle and recover quickly.
Plus, dont do just sit ups and "frontal abs" do twists and make sure to hit ALL parts of the abs.
I have no problems with training the core hard.
But, one "rests" just as hard.
Or your progress will retard.
The core's functions are vast and many:
It supports the body's overall weight.
It stabilizes and mobilizes, and provides support for activities we take granted.
It stabilizes and provides support for the major lifts that are critically important for "it's" functional growth as well as growth to the overall body.
Some of the core muscle structure can be very close to the lower vital organs, and serves to protect, and is one reason it takes low body fat to reveal them.
It resides in the middle of the body by design purpose, and this thought is critical to remember.
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I would put compound lifts in competition against any direct core work ; a matter of fact there is no competition.
Building the body "overall" in the way the body was designed to function coupled with a proper diet, will do MORE for premium core "improvement" than any direct core work--performed ALONE (or just by itself).
I support both indirect and direct core work; however, if I had to select one over the other, I would select indirect compound lifts.
Build the upper and lower body and the ab core has "no choice" but to follow, but its design construction.
And, with proper diet, you will reveal your "HOURS" in the gym.
To get a well designed ab core:
1. Takes
HOURS of time in correct diet out of the gym and
intense discipline. Revealing the core has more to do with
98% of the time one is not in the gym.
2. Takes
HOURS of consistency and persistence inside the gym.
The hours in the gym pales in comparison to the time spent outside of the gym in diet-that can ruin efforts inside the gym.
The fruits you want from the stimulus in the gym is brought to you through your diet. And, don't forget it.
I do not support doing the core 7 days per week.
If one is doing a FBW 3 days a week, for example, and then doing another 4 days of direct core work, this leaves no days for the body to rest and perform "its quiet but vitally important function":
To adapt, recover, and rebuild.
You MUST allow the CNS time to recover so it will repay you.
The idea is to attempt to bring optimal conditions not suboptimal conditions, and REST is where the body building really is ROCKEN ON!
Best wishes,
Chillen