Thank you for the query.
Groin pain which has appeared after physical activity is very characteristic for inguinal hernia. And sometimes during physical examination it can not be detected. That is why, to be sure that there is no hernia, groin ultrasound
should be performed.
Other possible reasons of such pain can be sciatica
due to spine disc herniation or piriformis syndrome
, urinary tract infection
I suggest you to rule out hernia with ultrasound, have urine analysis, and if no findings, spine MRI should be performed.
Hope this will help.