Seated hurdler stretch (Hamstring stretch, leaning forward, opposite leg bent, sitting)

Sit on a mat with your legs extended out in front of you.
Bend the good leg so that your foot touches the inside of your other knee.
Relax the knee out and bend forward, reaching towards the foot and dropping your chest towards your knee.
Keep your foot relaxed during the stretch.
You will feel this stretch through the back of the thigh of the extended leg.