There’s no one-size-fits-all formula for fueling your fitness endeavors. Here’s how Jason Sweetnam powers and recovers from his workout.
Measuring heart rate variability (HRV) used to involve a doctor’s visit. Now you can use smartphone applications to measure, track, and evaluate HRV on your own.
Your questions, answered.
Jen Sinkler, our editorial director of fitness content, wrangles leading experts to address your most perplexing workout quandaries and conundrums.