Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The Cardio Load ...

When it comes to running these days, wearables have become a part of the “uniform.” If you sift through race photos, you’ll probably see both recreational and professional runners looking down at ...

Allostatic load refers to the cumulative effects of stress on the body over time. The concept comes from a scientific theory on how stress affects physical health. According to the theory, high or ...