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 ...

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 ...

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 ...