A gym membership gives you access to equipment. Cardio Tennis gives you a coached, scheduled, social workout that's almost impossible to skip.
If you're someone who has never quite stuck with the gym, the structure of a Cardio Tennis class is the missing ingredient. The clock is set, the music is on, the coach is shouting your name.
It's not either/or — but for most adults, one Cardio Tennis class a week does more for fitness and enjoyment than three half-hearted gym sessions.