Some exercises are much better suited for doing at work than others. Jumping rope? Probably not a good idea. Going through an entire aerobics routine? No way. Using free weights? Now that's actually a great plan.
Store some small dumbbells under your desk or in a spare file drawer, and do bicep-, tricep- or shoulder-strengthening repetitions for 5 to 10 minutes once or twice a day for about three of your workdays. You can even do them while on the phone. When just starting out, women should opt for 2- to 3-pound weights, and men should choose ones that are 5 to 10 pounds [source: UC-Berkley]. Yet another way to build strength is to wear ankle-weights under your slacks -- especially if you walk a lot during your workday. A resistance band is also a convenient strengthening tool to keep at your desk.
If you want, you can take the weights with you for our next tip.