You should be absolutely fine with any and all gym activity.
I think the example given is probably the result of unfortunate placement.
I think it would be highly unlikely that you will break your NExT.
I have had my NExT for many years, and not once have I come close to breaking it, and I go to the gym and smash my hands around on a daily basis.
This should help soothe your concern
Well, yeah, but personally it think this is VERY conservative.
The longer the better to allow it to settle in it’s forever home, but realistically, just take your prenatals, take it easy where possible, and a week should be long enough.
I have a pretty active lifestyle and a number of implants, I have never had an issue and never had a concern of a breakage.
I’m assuming you are looking to install in P0.
It is a good meaty spot and in my opinion a great position for a NExT
Let me know if there is anything specific you want to ask.
In short
I’m not in a position to promise you anything, but my guess would be, if you get a breakage, it will likely be replaced for free