3–4 Times More Exercise Needed for Major Heart Protection, Study Finds

A new large-scale study suggests that current exercise recommendations may be enough for basic health benefits, but not enough for maximum protection against heart attacks and strokes.

Researchers report that significantly higher levels of physical activity—about 3 to 4 times more than the standard guideline—may be required to achieve strong cardiovascular protection.

WHAT THE STUDY FOUND

The study, published in the British Journal of Sports Medicine, analyzed data from over 17,000 participants in the UK Biobank project.

Participants:

• Had an average age of 57

• Wore wrist-based activity trackers for 7 days

• Completed fitness testing measuring VO₂ max

• Were followed for nearly 8 years

During the follow-up period, researchers recorded:

• 1,233 cardiovascular events, including

  • Heart attacks

  • Strokes

  • Heart failure

  • Atrial fibrillation

HOW MUCH EXERCISE IS REALLY NEEDED?

Current global guidelines recommend:

• 150 minutes of moderate-to-vigorous exercise per week

According to the study, this level provided only:

• About 8% to 9% reduction in cardiovascular disease risk

However, to achieve major protection:

• 560 to 610 minutes per week were needed

• That equals roughly 9 to 10 hours of exercise weekly

• This level was associated with more than 30% reduction in risk

WHY FITNESS LEVEL MATTERS

The study also found that exercise benefits depend on baseline fitness.

For example:

• Less fit individuals needed more exercise to gain the same benefit

• Fitter individuals reached protection with slightly less activity

To reach a 20% reduction in risk:

• Least-fit participants needed about 370 minutes/week

• Fitter participants needed about 340 minutes/week

This suggests that cardiovascular health is influenced not only by activity, but also by overall fitness level.

WHAT “MODERATE-TO-VIGOROUS” EXERCISE MEANS

Moderate-to-vigorous physical activity includes:

• Brisk walking

• Cycling

• Running

• Swimming

• Aerobic training

• Sports like football or tennis

These activities raise heart rate and breathing, improving cardiovascular efficiency over time.

WHAT THE RESEARCHERS CONCLUDED

The researchers suggest that:

• Current guidelines remain useful as a minimum baseline

• But they may underestimate the amount needed for maximum heart protection

• Future guidelines could become more personalized based on fitness level

They also emphasized that:

• The study is observational

• It cannot prove direct cause and effect

• Participants may have been healthier than the general population

WHAT THIS MEANS FOR DAILY LIFE

The key takeaway is not that people must suddenly double or triple their workouts, but that:

• More physical activity generally leads to greater heart protection

• Even small increases above the minimum can improve health outcomes

• Consistency matters more than intensity alone

FINAL THOUGHTS

This study reinforces a simple but powerful idea: movement is medicine, and more of it may offer stronger protection than previously thought.

While 150 minutes per week remains a good starting point, higher levels of regular activity could significantly reduce the long-term risk of cardiovascular disease for many people.