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Originally Posted by RomanHD  Well there's the isolation vs compound problem again. With the sandbangs, you might work some extra stabilizer muscles, but those same muscles might limit the amount of weight you can lift. I think that if you regularly do squats and deadlifts, especially with good shoes, then your stabilizer muscles are good enough. |
None of these exercises are isolation, squats, deads and sandbags are compounds.. I do agree that you will have good strong core with these two exercises (squats and deads) but bags or other uncomfortable training is different level. Check out stuff by Zach Even-Esh for that too
BTW, try out squats, overhead press and deads barefoot! Awesome! Just tried them Monday. Gonna be barefoot anytime I squat now!