Daily 4.5 Minutes of Intense Exercise Can Boost Brain Health and Slow Aging, Doctor Says

You may no longer need to spend hours at the gym to achieve good health. Kidney doctor Chiang Shou-shan suggests that short, intense bursts of exercise, totaling about 30 minutes per week, can significantly improve cardiovascular health, protect the brain, and delay aging. This equates to just 4.5 minutes of high-intensity activity per day.

The key is not the duration but the intensity. The exercise should be vigorous enough to leave you breathless, reaching approximately 85% of your maximum heart rate. A simple way to gauge this is by assessing your ability to speak: you should be able to utter short sentences but not sing or hold a continuous conversation.

Chiang cited a 2006 study analyzing health information from 60,000 people, which first documented these effects. Subsequent large-scale studies in Norway and other countries have yielded similar findings. Chiang himself follows this exercise regimen after undergoing hip replacement surgery, using resistance bands and springs for short, intense sets.

While current health guidelines recommend at least 2.5 hours of exercise per week, with 5 hours being even better, Chiang's research suggests that a much smaller amount of high-intensity activity can yield substantial health benefits. This approach challenges the conventional wisdom that longer workout durations are necessary for significant health improvements.