The lying leg curl is a must-do exercise for strengthening the back of your legs, but nailing the technique can be tricky.

The leg curl machine is one of the best strength builders for your hamstrings. Here at 5 leg curl alternatives to do when you don't have access to a machine.© Men's Health ...

The Sydee Leg Extension and Curl Machine would usually cost $1,100, but you can get it now for $203 at Walmart. Shoppers say it's a "solid choice" for leg day.

The glute ham developer (GHD) machine is a piece of gym equipment you can use to perform effective leg strength exercises, like the glute ham raise.

Looking to seriously strengthen your hamstrings? Give sliding leg curls a go. Celebrity trainer Don Saladino, cofounder of NYC-based Drive495 gym—whose clients have included Blake Lively, Ryan ...