New Study Finds Switching to Vapes or Heated Tobacco Products Boosts Aerobic Fitness in Just Weeks

Catania, Italy – June 4, 2025 

A new peer-reviewed study published in Scientific Reports has found that smokers who switch to electronic cigarettes (ECs) or heated tobacco products (HTPs) may experience measurable improvements in aerobic capacity in as little as four weeks. 

Led by researchers at the Center of Excellence for the acceleration of Harm Reduction (CoEHAR) at the University of Catania, this study is the first to offer prospective clinical evidence that substituting cigarettes with non-combustible alternatives can positively impact cardiorespiratory health. 

👉 View the study on PubMed 

🔍 What the Research Shows 

The study observed adult smokers who transitioned to either ECs or HTPs. After just four weeks, participants demonstrated statistically significant improvements in aerobic capacity, measured through indicators such as VO₂ max—a key metric of cardiovascular and respiratory performance. 

Participants also showed better endurance, improved heart rate recovery, and increased oxygen uptake, suggesting their bodies were becoming more efficient during physical activity. 

🗣️ Direct Quote from the Researchers 

According to the published study, “Switching to combustion-free nicotine delivery alternatives such as ECs and HTPs is associated with significant improvements in aerobic capacity over a short period of time in otherwise healthy smokers.” 

The authors emphasized the importance of these findings in guiding future smoking cessation strategies and public health efforts. 

🚭 Why This Study Matters 

This research offers smokers new information about the potential physical benefits of switching from cigarettes to other nicotine delivery methods. The results suggest that such a switch may lead not only to reduced exposure to smoke but also to faster recovery in physical health and lung function. 

Key takeaways: 

• Improvements in aerobic performance were measurable in just four weeks. 
• VO₂ max scores increased after switching from combustible cigarettes. 
• These changes may reflect enhanced cardiovascular and respiratory efficiency. 

✅ Bottom Line 

This study contributes to the growing understanding of how switching away from combustible cigarettes can impact health. While more research is needed, these early results show promising improvements in physical performance among adult smokers who choose alternative nicotine products.