I couldn’t leave my building today so I resorted to stair climbing (I live on the 10th floor).

FWIW I still prefer running outdoors (wind, fresh air, birds, other runners and yogis…), but apparently stair climbing is more effective to burn calories, even more if you take 2 steps at a time.

If you do both, is there any proportion that works best for you? like 2 days running and one day stair climbing? alternating days?

Any drawback doing too much stair climbing?