6. Wahoo Fitness products (www.wahoofitness.com)

Why we like them: If you own an iPhone or iPod Touch and can’t give it up as you exercise, now you don’t have to. This company makes a series of products that can turn your Mac device into your own personal trainer, a running partner, and even a personal nutritionist. Once you plug it a mini-sensor into the bottom of your portable device, it can receive data from a variety of other mini-sensors they make, including a heart rate strap to monitor your pulse, as well as devices you can attach to your bike—and even your shoelaces—that can determine not only how far you’re walking/running/cycling, but even how fast you’re exercising!