Was able to do 225x6 until I had to stop lifting weights due to a nerve impingement in my lower back about a month ago. I'm not supposed to start lifting for half a year or longer, so I'm doing bodyweight exercises right now and am going to do everything I can to start lifting again within the next few months, hopefully. Push-ups are one of the bodyweight exercises I'm doing and they're a completely new movement to me and they hurt like hell, so the shock to my muscles again should help maintain my muscle as best as possible.
Been training for 8 or 9 months with cardio in a big caloric deficit as a way to lose weight (lost 80+ lbs of fat, have about 20 more to go) and am now addicted to lifting weights and have adopted it as a total lifestyle.