Scoot your chair from behind your desk, stand up ... the seated leg extension is the perfect exercise to get blood flowing without disrupting anyone. Sit in your chair with your feet flat on ...

"The goal is to do the sit to stand exercise without using any equipment," says Glassman. You'll need a desk chair for this movement, which engages your triceps, chest, and anterior deltoid muscles.

However for someone who is weaker, the act of standing up from a chair could be activating a lot more muscle. In fact, follow-up tests suggest that for this age group the sit to stand exercise can ...

"The goal is to do the sit to stand exercise without using any equipment," says Glassman. Sit toward the front edge of your desk chair. Your knees should be bent and your feet should be flat on ...