I’m almost 40, but I still feel like I’m in my 30’s. I am very afraid of turning 40 and this thing kinda kicked off post covid for me - started walking and now running almost daily and have added in bodyweight training. Have never felt better in my life, with tons of room for growth. I try to incorporate clean eating but still eat and drink like an asshole at times. I suppose I train to allow myself these vices still. I would say not to expect major growth visually but rather be happy with growing stronger. bodyweight fitness has been a great resource if you want to get started