HIIT West Hampstead is known for its small-group personal training as much as its HIIT classes, based right in West Hampstead. SGPT gives you one-to-one coaching quality and heavier weights inside a small group that keeps you motivated. Add in our 45-minute HIIT sessions—up to 1,000 calories burned, using sledges, kettlebells, and rowers—and you've got both strength and fitness sorted, without the private PT price tag.