Cardio Tennis Classes START Monday evenings at 6:30 PM. Weekly sign up. Start of a 7 week drill program. Heart pumping fitness for tennis! Cardio Tennis is a high intensity on-court tennis drill session each week aimed at burning calories and having fun on the tennis court. All adult tennis players are welcome. Maximum of 16 participants each week. ENTRY: Sign up weekly at least 24 hours in advance by contacting Lee@OPRCtennis.com COST: $15 per class.