High-intensity interval training studio Orangetheory Fitness opened a Tech Ridge-area location at 12314 N. I-35, Ste. 105, Austin, on Sept. 21. The studio features one-hour full-body exercise classes that use heart rate monitors and various equipment, such as treadmills and rowing machines. This is the company’s ninth location in Austin and it is planning to open two more. 512-983-2876. www.tech-ridge.orangetheoryfitness.com