Yeah you should definitely get a space heater or something. Some bros say the cold makes you more hardcore, but I used to lift in my garage and winters were terrible. I would get very dizzy during my workouts and I think it hurt my progress overall. I don't know how cold the winters get where you are so maybe it won't be as bad for you, but I would recommend getting a heater if you can. My girl and I did korte two winters ago. It ended horribly. We both threw up outside the garage one of the times and it was dead winter, so the puke froze and was there, a constant reminder each day of how grueling korte is, until I finally got a shovel and scraped it all up. So don't do korte during the winter, outside in the cold... just fyi.