Erik.. I've been lazy all my life and as older person than you I found a way to help motivate.
I usually do it with a friend and make it social and I usually have a coffee on my way to the gym. It's like a pre workout. Dopamine association.
When you see some results like a personal best or you see a bit more a muscular physique than the addiction Starts.
BTW... thanks for all your hard work.