Im 42 and am stronger than Ive ever been, I don't deadlift but I squat, bench and push press, lifting more all the time (little amounts). I asked the trainer at the gym the same question and all he said "you feel alright dont you, dont worry about it" The biggest dude in our gym is 54 years old, me at 42 would nearly be the second biggest. Im a firm believer in listening to your body, for instance I am on my 3rd day off from the gym, Ill go tomorrow but I had few hard weeks, body said take a break. My belief is the only way you will get long term issues is if you dont allow enough recovery time or train while injured.