I used to exercise by playing racquetball with the guys I worked with every day at lunch. Luckily my manager played racquetball & never cared if we took the long lunch to play. I often wonder it that has kept me still being athletic even at my age (65) in spite of all the sports injuries I have had....though I don't play racquetball any more or do downhill skiing....there are so many other activities I do now & the little town I live in doesn't have racquetball courts & downhill skiing is way too expensive on my fixed income.