Weight vests can negatively affect posture and breathing.

“people that wear weight vests have typically terrible posture because of it it is just kind of a compression downward that doesn't really open up there there there's less in order to breathe better you you have to kind of create this this cavity of air in in the front of your your belly which the more fatigued you get the the more that you do that when you're wearing a weight vest and so you're kind of hunching over a little bit it's it's not good for what I would personally say you want your spine to look like this if you can”