A major new study suggests that short bursts of intense exercise could dramatically lower your risk of developing eight serious chronic diseases, including type 2 diabetes and dementia.
Scientists analysing data from more than 96,000 people using activity trackers for a week, along with 376,000 self-reports from the UK Biobank, found striking results over a seven-year follow-up. Those who regularly included vigorous activity in their routines saw up to a 63 per cent reduced risk of dementia, 60 per cent lower odds of type 2 diabetes, and 46 per cent less chance of dying compared to those who avoided it altogether. Remarkably, even a few minutes a day made a difference.
“These findings support, whenever possible, prioritizing higher-intensity activities in clinical and public health interventions aimed at preventing non-communicable diseases,” the researchers concluded in the European Heart Journal.
The protective effects covered major cardiovascular disease, irregular heartbeat, type 2 diabetes, inflammatory conditions like arthritis, liver disease, chronic respiratory issues, kidney problems, and dementia. As the British Heart Foundation highlights in its 2025 stats, such activity could prevent 80 per cent of premature heart deaths through simple lifestyle shifts.
Why the benefits? Interventional cardiologist Cheng-Han Chen, M.D., from MemorialCare Saddleback Medical Center, points to how “vigorous exercise raises the heart rate, which will help the heart pump more efficiently.”
This improves nutrient flow, relaxes blood vessels to fight high blood pressure, and boosts overall body efficiency against obesity and stress. “That would help the body systems in general be more efficient, which would improve other markers of disease risk,” he adds.
Harvard research from 2024 backs this up, linking intense efforts to better cell energy and reduced inflammation. In practice, aim for activities that leave you breathless: sprinting, fast cycling uphill, swimming laps, tennis singles, or basketball.
Fitness expert Albert Matheny of SoHo Strength Lab recommends integrating them seamlessly. “If you are already doing an activity, just get a little sprint in,” he says. “If you’re cycling, you can do intervals or just bike strong and then cool down after that. If you’re on a walk, find a hill and go up it hard. Just take what you’re doing and pick up the pace.”
The CDC notes one minute of this equals two of moderate exercise, while a 2025 Lancet study praises micro-bursts for building lasting habits. The WHO urges at least 75 minutes weekly, making it an accessible path to better health.