MetaFit HIIT Training by Outback Fitness

Costs $15 per class + Pool entry fee: $1 Class only, $6 To stay for a swim (Free for pool membership holders)

Original and genuine High Intensity Interval Training (HIIT). Burn more fat in less time with the EPOC effect, boost cardiovascular fitness and endurance through short bursts, and improve your posture. Time-efficient, equipment-free, and accessible for all fitness levels.

It's tough, that's why it works.