Treadmill and outdoor running deliver similar fitness benefits for most runners—miles count the same. Treadmill running can feel mentally and physically harder due to fixed pacing and lack of scenery.

Do you prefer running outside or on a treadmill? Jeff will run outside all year long, no matter the weather. Aly loves running outside, but heads for the treadmill if the weather is bad, or if she ...

Ask a group of runners whether they’d rather run on a treadmill or outside, and you’ll probably get some very strong opinions. Some can’t stand the boredom of indoor miles, while others love the ...