Yup, everyone is different. But I think that the three biggest factors in how much fitness you lose and how quick you regain it are:

Just how fit were you before you had to be inactive?

How long had you been fit?

How inactive were you really?

Every bit of activity helps to keep that base fitness remembered by your body, so even if your inactivity included a lot more walking or carrying things, or whatever, that helped. And the more fit you were, the more of your fitness remained despite your reduced activity. And the longer you had been fit before the inactivity, the more fit you are now....and the faster you will regain it.

Of course, half of this is said to help me not despair over my months of little to no exercise due to a health issue. But I'm sure my gentle stretching morning yoga still helped. And walking the dog when I could. And walking to work when I could. What I found when I did get on the bike (and I was still and am still not over my illness, just feeling a lot better than I did!), as long as I went at a slower pace, riding and even climbing was still doable, and didn't really even hurt. That gave me a lot of hope!

You'll be surprised by how much your muscles remember of what to do! But be easy on yourself about recovery time. No point killing yourself trying to do what you could do at your peak!

Hugs and butterflies,
~T~