lose weight (part3)

OMG...i am in pain...my right knee is nearly 'killing'
well, since becoming a PE teacher, my enthusiasm to lose a lottt of weight is memuncak2, so yesterday, i joined the kids to play badminton...BIG mistake i did was i did perform any scracthing exercise first, darn...eventhough i really stress on scracthing time to the kids, but the teacher sendri pun tak buat..so masa tgh syok memukul shuttle cock tu, and sometimes, melompat2 konon nak buat smashlah...adeih, tetiba kerkehelah pulak ....so, i am in pain...lutut kanan aku terseliuh nie.......sakitnyer wei, i cant even bent my knee during solat, end up i perform my solat on the kerusi...adaoiii....