I've been getting back into exercising regularly and whenever I start getting into legs, I feel it more in my lower back and I end up cutting my workout short out of worry that I might hurt myself.
I know that I'm supposed to "tighten" my core but does that mean to flex my abs while I'm dipping or does it just mean to stay balanced?
	
		
			
		
		
	
			
			I know that I'm supposed to "tighten" my core but does that mean to flex my abs while I'm dipping or does it just mean to stay balanced?

 
 Duly noted