Everybody knows that wall you hit around 2 or 3 pm at work. Your lunch energy has worn off, but there are still a few hours left before you can call it quits for the day. Most of us grab a coffee, or a cup of tea to keep us going, but we all know that extra caffeine isn't good for us, and can even hinder our ability to sleep at night.

Instead, why not try this simple exercise! All you need is a chair and enough space to stand up straight. This gets the heart pumping, wakes you up, balances muscles, and even increases bone density in the legs. Good luck!