I'm 40 and I recently started Stronglifts 5x5. It's stupidly simple and makes me want to come back for more as the weights increase every training. So there's always a personal record to break.
It also doesn't take a lot of time. About 45 - 60 minutes, 3 times a week. I can do it in my home gym as everything I need is a barbell, some weights and a bench/squat rack.
First time I actually have fun weight lifting/going to the gym.
I started with Stronglifts! It’s the program that finally gave me a degree of health and made lifting enjoyable/satisfying. Eventually went to something a little less leg heavy (although squats will always be my favourite exercise) with a better system for breaking plateau’s and more accessories, but Stronglifts was what finally made the gym fun.
It also doesn't take a lot of time. About 45 - 60 minutes, 3 times a week. I can do it in my home gym as everything I need is a barbell, some weights and a bench/squat rack.
First time I actually have fun weight lifting/going to the gym.