any of u measure your heart rate during game? ive been playing for bout 6yrs, i'd call myself an average player. im 30 now. i recently bought a polar heart rate monitor, tried it on during games. my resting heart rate is between 68 and 76. during doubles game it peaks at 180. in singles though it exceeds 200. ive since stopped using the monitor. mainly because for years, i feel like ive pushed myself harder than when i felt when the monitor exceeded 200. i am nevertheless worried, reason i bought the monitor was because ive heard of people collapsing in the middle of a game and dying as a result of heart attack.