When my back and arms ache, the stitching does what I tell it to do instead of what I want it to do, my frustration begins, and I get crabby! Best thing to do, in any weather, for me is to go outside. Just hike a bit, stop to enjoy the beauty of nature - although now its frozen - and relax. Then back to the sewing room, put on some pretty music, thank God for all your blessings and begin again.