I strengthened my hamstrings with this simple leg exercise — here’s how to do it

As a runner, I’m pretty lazy when it comes to strength training, but as I recover from an injury and start another marathon training plan, I’ve sought the help of some experts.

For the next 16 weeks, I’ll be doing two strength training sessions and four running sessions a week. The goal is to run faster on race day and to avoid any old injuries flaring up and derailing my training. Yet this week, I’ve torched my hamstrings to the point that walking down the stairs causes me to wince, and one exercise is to blame — hamstring curls.