Creating a smaller waist can be done in 2 ways: training the TVA/abs correctly and by building strategic muscle in the upper back and rear delts.
A strong TVA can help take inches off of your waist.
Smart weight training will give you the illusion of a smaller waist.
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Exercises mentioned in this workout:
2). Wide grip pulldown (high pull)
3). Dumbbell pull over
4). Single arm pulldown
5). Rear delt press
6). Rear delt raise