One time almost 4 years ago, I was hunting in Alberta and had rattled a wide 8pt to my location. It was real cold that day with some snow on the ground, and I had been sitting for about 3 hours. When this buck got to within range, almost too close, I went to draw my bow and couldn't get it all the way back! I eased off and tried again, but he caughta bit ofmovement and trotted off a few yards, stopped, looked back in my direction, snorted and just walked away in the direction he had come from. I was pissed!
I learned a valuable that day in Alberta. When you have to sit for long periods in very cold weather, you have to take practice draws every hour or so to keep your muscles loose, and warmed up because they get stiff.. It's also a good idea to lower your poundage a little when hunting extreme cold. At least I'm a believer in doingthese two things.