Heart arrhythmias detected in deep-diving marine mammals

A new study of dolphins and seals shows that despite their remarkable adaptations to aquatic life, exercising while holding their breath remains a physiological challenge for marine mammals. The study, published January 15 ...

Gift Guide: Five fitness trackers offer wide range

There are several fitness trackers to choose from, varying in what they measure and how easy they are to use. Here are five, ranked from budget to sophisticated, to give you a sense of the range available. By no means are ...

Gift Guide: How to pick the right fitness tracker

The holidays are here, which means feeling guilty about how much you're eating and how little you're exercising. Gadgets are available to help keep that in balance.

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