Exactly my thoughts, people slow themselves down as they age and it's surely a combination of reasons, and you can do what you want. But use it or lose it rings

Exactly my thoughts, people slow themselves down as they age and it's surely a combination of reasons, and you can do what you want. But use it or lose it rings true. When you break your collarbone, the majority of your recovery is actually healing the joints and muscles that atrophied while you were in a sling (exceptions for surgery etc.) The bone takes care of itself, but your shoulder and arms freeze up and wither away alarmingly fast. If you have a bad joint and the pain causes you to reduce movement, it's very worthwhile to see a physio and keep the joints moving while it heals, to avoid further damage.