Health HIIT Exercise Performs Best for Losing Fat While Maintaining Muscle in Older Adults by Dr Natalie Singh - Health Editor July 4, 2026 by Dr Natalie Singh - Health Editor July 4, 2026 High-intensity interval training (HIIT) is the most effective exercise method for reducing body fat while preserving muscle mass in older adults, according to a study published in the journal Maturitas. … 0 FacebookTwitterPinterestEmail