Sabrena Jo, Ph.D., senior director of science and research at the American Council on Exercise, has decades of experience helping people find ways to become physically active. From working one-on-one ...

Boundaries were meant to be broken! Here’s your personalized plan for shattering 30, 25, or 20 minutes in your next 5K. Craving a 5K personal record? You got it! The following three plans take the ...

Weekly Schedule: 2-3 days run/walk, 1 day cross-train (first half of plan), 2 days rest, and 2-3 days strength training Sample Workout: Warm up with 5 minutes brisk walking, do run/walk intervals for ...

Runners of all types rely on run/walk intervals both to train and race. These intervals can help increase speed and mileage for faster overall race times. However, there is a sticking point! This ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Training plans mean different things to different people. Perhaps you’re a seasoned interval trainer, or maybe you’ve never tried one before. Regardless, a good training plan is something we can all ...