The hamstrings help stabilize the hips and assist with movement. Start with 2-3 sets of 8-12 reps: Back extensions hit the ...
“Back extensions work to activate the core, which includes the glutes, lower back, and hamstrings,” says Webber. While back ...
Gym Smarts: Lower Body Hamstring Curls ... And your rear comes up, off, you actually get an arch or extension in your back. Once again this is the proper way.