I'm not talking about a Penguin Plunge here - there will be no jumping into freezing cold water in the middle of winter to raise money. I don't think I could ever do that.
I'm talking about joining a gym or YMCA that has a pool you can use to swim laps in for fitness.
Wintertime can be too cold for most of us to exercise outdoors, and swimming is just about the most excellent form of exercise you can do. It's a great cardio work out to get your heart pumping - but you can't overheat because the water keeps you cool.
It combines breath work and strength training, while having very low stress on your joints and bones.
It's great for people who have knee pain or injuries from running, so you can still work your total body without pounding your feet into the pavement.
All you need are the obvious things - a pool, a swimsuit and a pair of goggles to protect your eyes from the chlorine. See you in the pool.
Fit's Tips: If you're going to be swimming consistently a few times every week, you want a bathing suit that'll be comfortable and will last. Try to find a suit that is chlorine resistant, because after time, exposure to chlorine can ruin the stretch fibers of a regular bathing suit, which can make it sag - not what we're going for here.