This is the heartwarming moment an exhausted schoolgirl kept running to finish a race despite losing her energy.

The participant, who reportedly suffered from dysmenorrhea, ran three kilometres (1.9 miles) during a sports event held by the Judicial Police Vocational College in Sichuan, China, on November 7.

Footage shows the student lumbering toward the finish line. In the final steps, she is seen crawling, supported by the encouragement of her friends and teachers.

The crowd can be heard cheering and applauding her determination to finish the race despite being in pain.

Period pain can feel like a dull, constant ache or intense spasms. Some women describe it as comparable in intensity to a heart attack.