As soon as I realised I would not be going for long walks for a long time I decided to walk a modest local distance every day from home and also to do a ten times repetition up and down my stairs and I have now done that since 25th March.
The stairs were my own idea from the start, but I now find other outdoories have also adopted the staircase challenge and converted it into virtual ascent of their favourite mountain and I now have commenters here suggesting I do the same.
I'm not sure if I have a favourite mountain but I reckon Ladhar Bheinne by Mirror dinghy with outboard from Kinlochhourn to Barrisdale Bay and then the ascent from sea level must be the most likely qualifier, especially as the measured ascent from sea level is unequivocal.
Ladhar Bheinn - 1010 metres = 3314 ft. rounded up
My stairs: 8ins. rise x 10 = 800 ins. = 67ft rounded up
3314/67 = 50 days rounded up.
I prefer to work in feet, I suppose because that is how I first started looking seriously at OS maps back in the 1950s, and then of course it is the basis for defining Munros.
The revelation that it would take me 50 days to do what we probably did in five or six hours has done little to allay the possible onset of Lockdown Lassitude - ah! a potential new acronym: LL.
If you are still full of optimism and planning new projects for The Resumption have look at a new book/list I discovered:
Raistricks and Other Hills Over 1000ft. in the Yorkshire Dales by Bernard Peel.
This is a self published monumental labour of love. Bernard is a retired civil servant and he has identified 242 hills that match his parameters as indicated by the title. The amount of work involved must have been huge with a result to be proud of. There are comprehensive tables, photographs, suggested routes and much more. Even if you do not intend to take on the challenge the book is well worth ever penny of its £10. I obtained it by emailing Bernard direct and doing a bank transfer.