This is because the forces the hamstring muscle group are subject to when you’re sprinting are far greater. It’s individual. Pain is relevant ... but there are a couple we do know: as you ...

The hip flexors — the muscles that run ... buttocks and lower back pain and may put you at risk for tearing the hamstring when running or participating in sports. Do these exercises to help ...

DOHA, Qatar (AP) — Novak Djokovic was upset by Matteo Berrettini 7-6 (4), 6-2 on Tuesday at the Qatar Open in the Serb's first match since exiting the Australian Open with a hamstring injury.