Gym Day one: Where did the feeling in my arms go

Have not gone to the gym in years. I literally woke up earlier this week and turned to my wife and told her we need to go to the gym. She gets a discount from her work so we signed up Thursday night and I went alone Friday (she was working). An hour of lifting later and I feel great other then wondering why my arms are numb and painful, I am struggling to itch my nose. Oh well looking forward to seeing the results in a few weeks!