The holiday season could also be called the slouchy season. We spend more time than normal sitting and eating; it's often too cold to spend a lot of time outdoors; and our cozy sweaters and scarves mask our winter bodies.
Do more for your core. Take our 7-day "thanks and planks" challenge and work your way up to the perfect plank. Planks help build your core's abdominal muscles, but also help tone hamstrings, glutes and shoulders.
Drop and give us 20 — seconds — at work, school or home, and start planking your way to better posture.
View the printable version of this infographic.