I've worn bifocals full time for over 15 years, with solid line, wear for everything, including hunting and shooting and I do a lot of both. No issues, walking or otherwise. Did a field test on progressives and found they are not for me.

Wouldn't have it any other way (though I expect to have cataract surgery in about 5 or 6 years, and really look forward to a return of perfect vision afterward).