I weigh 190 lbs. and when do pushups with these (which I do twice a week, every week) I'm wearing a 50 lb. weighted vest. Even with the vest they feel totally sturdy and I have absolutely no worries that they're going to crack or flip over or be in any way unstable. I would say don't worry at all about their strength or durability.I also love the fact that they're angled--I've been having some wrist issues and this takes a lot of stress off of my wrists.Overall, a great little workout tool and really worth the money.
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