Badminton again

Just now about 7.30pm go to play badminton. Only five of us go and play. We play badminton until 9.00pm. I am very tired. I play about two hours continuously without rest. Before playing badminton, I have warming up properly, but my shoulder still a bit painful, maybe it is because of excessive exercise. Tomorrow whole day have classes, so I have to sleep early. Good night,everyone.