Do both and climb only 1 flight of stairs everytime. Stop if you're tired. I was pregnant with my 3rd when the nesting instict came. You know what I did? I rearranged all the furnitures in my house then that night I started to have contraction. I was already 4cm at 35 weeks. smh 😅 But don't follow me of course. I do that everytime my nesting instinct come. Don't know why.
Climbing up and down stairs side way (like a crab walk) is even better. Use the arm rail for safety purpose. It helps to improve pelvic mobility and the descend of baby. 2 steps at a time is OK if you feel comfortable. Make sure there is someone nearby just in case.
you should hv sex to induce labour instead, much enjoyable than climbing stairs
climb up n down n squat .