lower back underdeveloped

[tb2010]

@sonicboom

first of all, thanks to both of you. I do know which exercise you refer to by the way. Hadn’t thought of it.
What about the sides (handles). Is that just stubborn due to age?

read about the spot reduction myth. thats just a sign that you have some excess bodyfat. everyones body has a “program” for where it stores fat, and where it depletes it from. with some dieting, the handles will go away