Cycling and Heart Health: The Protective Benefits of Long-Term Riding on the Heart

Introduction

The benefits of cycling for heart health have been supported by scientific research for over half a century. A large-scale follow-up study conducted by the University of Glasgow in the UK in 2017 on 260,000 British commuters found that, compared with those who used public transport, commuters who cycled had a 46% lower risk of death from cardiovascular disease and a 41% lower overall mortality rate. Such striking data makes cycling a powerful tool for preventing heart disease.

The Physiological Protective Mechanisms of Cycling on the Heart

Adaptive Changes in Heart Structure

Long-term aerobic training causes a “physiological cardiac enlargement” (Athlete’s Heart) in the heart, which is completely different from pathological cardiomyopathy:

A lower resting heart rate is the most intuitive indicator of heart health. A well-trained cyclist’s resting heart rate can drop to 45–55 bpm, meaning the heart beats 20–30 fewer times per minute than the average person, significantly reducing the heart’s cumulative workload over a lifetime.

Improvement of Cardiovascular Risk Factors

Regular cycling has significant improving effects on major cardiovascular risk factors:

Blood Lipid Improvement:

• HDL (good cholesterol): Cycling 150 minutes per week can raise it by approximately 3–5 mg/dL
• LDL (bad cholesterol): Can be reduced by 5–10%
• Triglycerides (TG): Can be reduced by 10–20%

Blood Pressure Control:

• Moderate-intensity cycling (60–70% of maximum heart rate) for 3 months can lower systolic blood pressure by 4–9 mmHg
• Diastolic blood pressure can be reduced by 3–5 mmHg
• The effect is equivalent to a mild dose of an antihypertensive medication

Insulin Sensitivity:

• After cycling, GLUT-4 receptors in muscles are upregulated, improving glucose uptake efficiency
• Long-term cycling reduces the risk of type 2 diabetes by approximately 20–40%

The Relationship Between Cycling Intensity and Heart Health

It is not true that “the more you ride, the better”; proper intensity distribution is key to maximizing heart-protective benefits.

The 80/20 Principle (Polarized Training):

• Approximately 80% of riding time is maintained at low to moderate intensity (Zone 1–2, heart rate at 60–75% of maximum heart rate)
• Approximately 20% of the time is spent on high-intensity training (Zone 4–5, heart rate above 85% of maximum heart rate)
• Long-term studies show that this distribution improves VO2max more effectively than training entirely at moderate intensity

Practical Intensity Guidelines for Taiwanese Riders:

• Low-intensity base riding (3–4 times per week, 45–90 minutes each session): able to hold a natural conversation, slightly breathless
• High-intensity intervals (1–2 times per week): unable to speak, rapid breathing, lasting 3–8 minutes
• Complete rest days (at least 2 days per week): allowing the heart to recover and adapt

Special Considerations for Specific Groups

Middle-Aged and Older Riders (50 and above):

• Before starting a new exercise program, an Exercise ECG screening is recommended
• Be aware of “Cardiac Drift”: after prolonged riding in high temperatures, heart rate rises at the same workload; intensity should be reduced in such cases
• Use a heart rate monitor to avoid misjudging intensity based on subjective feelings

Riders with Existing Heart Disease:

• Patients with coronary artery disease can cycle, but a personalized exercise prescription should be established after evaluation by a cardiologist
• Patients with atrial fibrillation (AFib) need to pay special attention to the possibility that high-intensity exercise may trigger arrhythmias
• Patients with pacemakers or ICDs need to confirm the device’s maximum heart rate settings

Practical Recommendations

Establishing Systematic Heart Monitoring Habits:

• Daily Morning Resting Heart Rate: Measure resting heart rate before getting out of bed; more than 7 bpm above the average → warning sign of overtraining
• Heart Rate Variability (HRV): Use devices such as Garmin or Polar to track HRV; a continuous decline in HRV → the body has not recovered
• Annual Heart Health Check-up: Including ECG, echocardiography, and a full lipid panel, especially for riders who ride more than 10 hours per week

Special Considerations for Taiwan’s Weather:

• In the hot and humid summer environment, the heart’s workload increases by 20–30% compared with cooler conditions; target intensity should be lowered
• Avoid high-intensity riding when the Air Quality Index (AQI) exceeds 150

Conclusion

Cycling is one of the most heart-friendly aerobic exercises. Its low impact, adjustable intensity, and ease of maintaining as a long-term habit make riding an excellent choice for protecting heart health across all age groups in Taiwan. Whether you are an urban commuter or a competitive rider tackling mountain courses, with regular and well-planned riding, your heart grows stronger every day.

Related Reading

• Cycling and Cardiac Adaptation: Long-Term Benefits of Regular Riding on Cardiovascular Health
• The Comprehensive Impact of Cycling on Cardiovascular Health: A Summary of Medical Research
• The Health Benefits of Cycling: Cardiovascular Advantages Revealed by Research
• Heart Health for Cyclists: Balancing Athlete’s Heart and Overtraining