We stabilize our entire trunk through the use of our abdominal muscles. Keeping our mid sections strong is key to preventing injury. Stop when you are tired. If you know you are tired, swallow your pride and quit or take a break. Before and after any strenuous exercise, stretch your muscles.
Tight hamstrings are a common cause of imbalance in the low back.
Drink water, not alcohol. Alcohol makes us colder by dilating surface blood vessels and makes us less attentive to the tasks at hand. We can dehydrate easily in the winter without drinking enough water. Use the proper equipment. Skis, boots and bindings should be checked and adjusted properly.