Winter brings two challenges – colder temperatures and shorter days. Both can drive an athlete to workout inside on a bike trainer and a treadmill, but I do not think that this needs to be the case all of the time.
Sure, if there’s a blizzard outside; the sidewalks and roads are icy; and visibility is 0%; ride your trainer inside or go for a swim instead.
If the conditions are not too bad, exercising in...