Amen about working harder to maintain muscle mass and strength. I am in my 60s and try to follow the general guidelines of Navy Seals. They could care less about bench press prowess. They focus on exercises like pull ups and parallel bar dips. My senior Vietnam era veteran friends and I can still do 10 pull ups followed by a pause of 30 seconds and then 10 dips. We do this 5 times for a total of 100 reps.
We all believe exercising hard has helped our cycling endurance as well as enhance our other sports related activities requiring endurance.