A challenging interval programme with a unique blend of pure cardio, cardio/core and pure core exercises.It's all exceptionally well-cued and well-designed (with natural transitions and effective sequencing).Most intervals are classic Cathe-style fat-burning - high-intensity plyometrics like air jacks, lateral jumps and squat jumps.But some of Cathe's aerobic sections also integrate fast-paced ab toning (e.g.mountain climbers and squat thrusts that really work your core).The pure core intervals only last a couple minutes, but they're tough too (e.g one-leg push-ups and "triangle choke holds").Superb cuing.2009.Level: Advanced.Length: 51 minutes.