For beginners, interval running can be a great way to jumpstart your motivation and ramp up your fitness. Get tips from experts, plus plans for interval runs.
![Every runner should be doing plyometrics [📹 dr.lisa.dpt]](https://i.pinimg.com/originals/05/a0/ef/05a0ef4916b10e0066b071c28b5dbba2.jpg)
