HIIT Lab is an independent boutique HIIT studio founded in 2016 by West Seattle local Cathy Kerns. The studio focuses on helping members get healthier and stronger in a supportive, nonjudgmental environment. Its training program combines cardio and strength work, and classes feature Woodway treadmills for a more comfortable, low-impact running experience. HIIT Lab also regularly partners with small local businesses and nonprofits, with locations in West Seattle and the Central District.