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Yes. The effect is smaller than smoking but not nothing. Research suggests vapers have around 10% lower peak oxygen consumption during exercise. For everyday cardio you may barely notice. If you are chasing a personal best, it matters more.
Whether vaping affects your cardio depends on what you are comparing it to. Two questions, two different answers.
Vaping vs smoking
Vaping vs nothing
If you switched from smoking to vaping, your cardio almost certainly improved. If you started vaping without ever smoking, you have probably reduced your peak fitness slightly. Both can be true at the same time.
Several pathways combine to produce the cardio impact research is now picking up.
01
Nicotine raises heart rate
Nicotine pushes your resting heart rate up by 10 to 15 beats per minute. During exercise, your heart has less headroom before hitting peak rate. Recovery between efforts takes longer.
02
Blood vessels narrow
Vasoconstriction from nicotine reduces blood flow to muscles. Less oxygen reaches working tissue, which limits how hard you can push and how long you can sustain it.
03
Airway irritation
Vape aerosol can cause mild airway inflammation. For most people it does not affect daily life but it can reduce efficient oxygen transfer during high-intensity work.
04
Skeletal muscle changes
2024 research suggests muscles in regular vapers are slightly less efficient at extracting and using oxygen from the blood. The effect is small but measurable.
The effects show up differently depending on what kind of exercise you do.
This is where vaping is a clear win. The improvement after switching tends to be fast and obvious.
2 to 4 weeks
Morning cough fades
Most former smokers notice their daily phlegm and cough significantly improving within the first month.
6 to 8 weeks
Breathing during cardio gets easier
Climbing stairs, running for a bus, longer walks. You can do more before feeling out of breath.
3 to 6 months
VO2 max improves
A 2025 Ceasefire study found measurable improvements in maximal oxygen uptake in people who switched from cigarettes to vaping.
6 to 12 months
Performance plateau
Your fitness has caught up with where vaping (rather than smoking) puts you. Further gains require lower nicotine, more training or both.
You do not need to quit nicotine to get fitter. A few changes make most of the difference.
Drop your nicotine strength
Going from 20mg to 10mg reduces vasoconstriction and the resting heart rate bump. Most people see cardio gains within weeks.
Avoid vaping for an hour before training
Nicotine peaks within minutes and tails off over a couple of hours. Letting it clear before exercise puts you closer to your real capacity.
Stay properly hydrated
Vape aerosol is mildly dehydrating. Dehydration on its own reduces exercise performance. Two birds, one stone.
Avoid vaping immediately after a session
Your heart rate is already elevated. Adding nicotine on top is unnecessary stress and slows recovery.
Build aerobic base slowly
Easy long sessions at conversational pace build the cardiovascular system more effectively than constant high-intensity work. Particularly important for vapers because the recovery cost is higher.
Consider going nicotine-free for evening vaping
Reduces daily nicotine exposure without changing the habit. Often improves sleep too, which feeds into training recovery.
Vaping should not cause serious cardiovascular symptoms. Speak to your GP or call NHS 111 if any of these apply:
Vaping has a small but real cardio cost
Around 10% reduction in peak exercise capacity in studies of regular vapers. Noticeable at the top end of effort, often invisible in daily life.
Switching from smoking improves cardio fast
Most ex-smokers see meaningful gains within 2 to 6 months. The improvement comes from no longer inhaling smoke, not from the vape itself.
Lower nicotine helps
The biggest single change you can make without quitting is reducing nicotine strength. Cardio improves within weeks for most people.
Part of our guide
Clear, UK-focused answers to the health questions vapers actually ask. From side effects to long-term research.
Back to Health Guidance