Due to the current health crisis, you may be deprived of your daily exercise of a walk in the park or around the block. Don't despair, there are several ways of getting your exercise without going out the front gate.
Stairs. If you have stairs in your house, they are almost a built-in exercise machine. Up and down several times a day would be good exercise and you can vary your pace, depending on your fitness level.

Built in exercise facility.
Letterbox. Take a walk to your letterbox every hour to check if any mail has arrived. You may know that the mailperson always arrives at 11.00 am every weekday and if on your midday journey, you find no mail, keep going as it is still good exercise. Go out the back door to increase your mileage.

Bingo!
Walk in the backyard. Take a notebook with you and note all the gardening that needs doing. That's more exercise for later. If you have a big back yard, you will get lots of exercise. Only a small yard? Several circuits are the answer.

Wasn't like this last time I looked.

Even more exercise.
Walk around the house. Do a circuit around the house into every room. Take a duster with you for extra exercise. Several circuits a day will mount up your distance travelled.

Perhaps not this room.
Shopping centre carpark. When you venture out to do your essential shopping, park the furthest from the entrance that you can and have a good walk. I always do this and I estimate that if I walk up and down every aisle in the supermarket, by the time I get back to the car, I have travelled one kilometre. This is excellent exercise if getting back to your car, you have forgotten something, and need to repeat the journey.

A good walk to get there.
An added advantage of the far corner of the carpark is that you are more likely to find a spot than outside the front door.

Plenty of spaces in the far corner.
Necessary appointments. If you need to attend anywhere in a multi-level building take the stairs, not the lift, unless your destination is on the 20th floor. Perhaps come down the stairs.
All the above sound much better than doing 50 push-ups in the lounge room.
If you have a nice spot in your backyard, have your morning and afternoon tea or coffee there, breathing in fresh air.