Want to live longer? Try fartleks. - Post Reports Recap

Podcast: Post Reports

Published: 2025-12-29

Duration: 22 minutes

Guests: Gretchen Reynolds

Summary

Fartlek, a Swedish term for 'speed play', is an informal interval training method that can enhance fitness, endurance, and longevity. Exercise expert Gretchen Reynolds highlights its accessibility and effectiveness, even in brief sessions.

What Happened

Gretchen Reynolds, an exercise columnist for The Washington Post, discusses the benefits of fartlek training, an informal version of interval training. She describes it as a fun and accessible way to improve fitness without the need for complex equipment or a coach. Fartlek involves picking up the pace until a chosen landmark and then slowing down, making it adaptable to various fitness levels and environments.

Reynolds emphasizes that fartlek can help people return to their New Year's fitness resolutions, as it is effective and easy to implement. She notes that this method gained popularity during the pandemic when access to gyms was limited. Fartlek allows individuals to add intensity to their workouts, which can lead to improved VO2 max and overall fitness.

She also mentions the 'talk test' as a way to measure exercise intensity, explaining that if you can talk but not sing, you're in the right zone. This simple method helps ensure that the exercise remains enjoyable and manageable.

Reynolds references research by Dr. Ulrich Wisloff, who supports the benefits of interval training for heart health, brain function, and longevity. Wisloff's work shows that even moderate increases in exercise intensity can reduce the risk of various diseases and enhance endurance faster than steady-state exercise.

The episode highlights a study involving 7,500 participants, indicating that those who engage in more intense physical activity occasionally have a lower risk of mortality. This finding supports the idea that adding intensity to exercise routines can significantly impact longevity.

Reynolds discusses a study showing that aerobic fitness is more crucial than body weight for long-term health. Individuals with higher fitness levels, regardless of BMI, had a lower risk of premature death, reinforcing the importance of endurance exercises like fartlek.

She concludes by recommending the seven-minute workout, another interval-based exercise routine she popularized. This workout can be done anywhere and combines strength and endurance training, making it a practical option for busy individuals seeking to improve their fitness.

Key Insights