This time I'm telling you to gut it out and rock a tough week! Go back-to-back workouts for one week just to show your bod you still can. Your muscles will freak and perform at their finest BECAUSE THEY CAN. This overload will certainly shake up any plateaus you've reach during your winter workouts.
Don't forget to vary your workouts while you do this. Hit various classes that are available, sign up for a class if you don't normally participate, run outside instead of on the treadmill, swim, bike instead of walk (I could go on!), but be sure and work multiple days in a row.