Training after a long flight should be easy and done outdoors in daylight. Light and movement reset your body clock and get your blood flowing again after hours in a plane seat. Here is a simple plan for the first three days, and how to read resting heart rate and HRV on your watch.
Day 1: a walk or a very easy jog outdoors in daylight, 20–40 minutes in zone 1–2. You should be able to speak in full sentences.
Day 2: still easy, ideally with a short strength session in the park using a bench, steps and your own body weight.
Day 3: harder sessions only if your resting heart rate is close to normal and your HRV and sleep are no longer getting worse.
Your watch: compare with your own baseline and look at the trend over several days, not at a single number.
Daylight: after eastbound flights the morning is best, after westbound flights the late afternoon.
See a doctor if one calf becomes swollen, warm and painful, or if you get chest pain or shortness of breath.
Day | Outdoor session | Heart rate | Check on your watch |
|---|---|---|---|
Day 1 | Walk or easy jog in daylight, 20–40 min, plus 10 min stretching | Zone 1–2, you can talk | Just observe. A high resting heart rate and low HRV are normal |
Day 2 | Easy run or bike ride, plus 15 min strength in the park | Zone 2, short peaks in zone 3 | Are your numbers better or worse than yesterday? |
Day 3 | Normal session, intervals if you feel ready | As you feel | Resting heart rate near normal, HRV and sleep not getting worse |
Numbers still poor | Walk, cycle easy or swim | Zone 1–2 | Wait another day before pushing |
A long flight strains your body in three ways. You have been sitting still for many hours, so your hips and back get stiff and blood flows less well in your legs. Cabin air is dry, and according to the CDC, too little fluid can make jet lag symptoms worse. And your body clock is still set to home time.
Outdoor training tackles all three. Movement gets your blood going, and according to the CDC, daylight is the most important tool for resetting your body clock. A session outdoors gives you both at once. But your body is already tired from little sleep and a new time zone, so the first session should be easy. Hard training on day one is an extra strain, not a shortcut.
Our advice is simple: think of training after a long flight as part of the trip, not as a performance. We recommend planning your first session as carefully as your first dinner.
Most heart rate watches and fitness rings measure resting heart rate, heart rate variability (HRV) and sleep. After a long flight you will often see this:
Higher resting and night-time heart rate than usual. Your body is working harder than it should while you rest.
Lower HRV. Heart rate variability tends to drop when the body is stressed, and after crossing many time zones the dip can be clear.
Poorer sleep score and a lower training readiness score for the first few nights.
How to read the numbers correctly:
Compare with yourself. What matters is the difference from your own baseline, not what other people have.
Look at the trend. One bad number says little. If your resting heart rate is going down and HRV going up over two to three days, you are on the right track.
Listen to your body too. If the warm-up feels heavy, or you feel dizzy or unusually tired, take it easy whatever the watch says.
The watch does not diagnose. It cannot tell whether you are ill or dehydrated. If you have a fever or feel unwell, do not train.
A woman in sportswear checks her smartwatch while training outdoors by the sea. Photo: Kampus Production / Pexels
Switch to local time on your watch when you board. That way sleep and heart rate data are recorded correctly from the first night.
Use a jet lag feature if your watch has one. Garmin offers Jet Lag Adviser on many of its newer watches, including the Forerunner and Fenix series. You enter the trip in the training and planning section of the Garmin Connect app, and the watch advises you when to seek light, sleep, train and drink coffee. Other brands have similar sleep and recovery metrics.
Charge it fully and pack the charger in your hand luggage. GPS uses a lot of battery.
Download maps of the area to your watch or phone before you leave, so you do not need mobile data on your first outing.
If you have not measured your maximum heart rate, the talk test is the easiest way to keep the right pace during the first days:
Zone 1–2: you can speak in full sentences. This is the pace for day 1 and most of day 2.
Zone 3: you can only manage short sentences. Fine in short bursts on day 2.
Zone 4–5: you can only say a few words. Save this until your body is ready.
Remember that heart rate rises with heat, humidity and altitude, not just speed. If you land somewhere hot, such as Thailand in winter, your heart rate will be higher than at home at the same pace. Slow down and let your heart rate guide you.
A woman jogs slowly on a path between trees and flowering bushes. Photo: Lucas Andrade / Pexels
The first session is about light and circulation, not fitness. Walk or jog easily for 20–40 minutes in zone 1–2.
Pick your timing based on the direction you flew:
Eastbound (for example from Europe to Japan or Thailand): train in the morning or late morning, and dim the lights in the evening.
Westbound (for example from Europe to the USA): train in the late afternoon or early evening.
Finish with ten minutes of stretching on a bench or a lawn:
Calf raises on a kerb (20 reps). Wakes up your calf muscles.
Hip flexor stretch with one knee on the grass (1 minute per side). Your hips get stiffest from sitting.
Hamstring stretch with your foot on a bench (1 minute per side).
Standing glute stretch, ankle over the opposite knee while holding the bench (1 minute per side).
Chest opener with your hands against a tree or a fence (1 minute). Counteracts the hunched shoulders from the plane seat.
Suitable for: everyone, including those who do not usually train.
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Walk or jog easily again, ideally a little longer than yesterday. If you feel good, add four to six short strides of 15–20 seconds where your heart rate only just reaches zone 3.
Then do 15 minutes of strength using a bench, steps and your own body weight. Do three rounds:
Squats (12 reps)
Incline push-ups against a bench (10 reps)
Step-ups on a bench or stairs (10 per leg)
Lunges (10 per leg)
Plank (30 seconds)
Many cities have free outdoor gym equipment in parks and along beaches, for example along the beach promenades in Spain. Feel free to use it, but keep the intensity moderate.
A smiling woman holding a plank on the beach. Photo: Nathan Cowley / Pexels
Check your watch in the morning before you decide:
Green light: your resting heart rate is close to normal, HRV and sleep are no longer getting worse, and the warm-up feels normal. You can train as you would at home.
Amber light: your numbers are better but not back to normal. Stick to an easy session, or do a short, light interval session.
Red light: your resting heart rate is still high, HRV low and sleep poor. Walk, cycle easy or swim, and reassess tomorrow.
There is no fixed timeline. How long you need depends on how many time zones you crossed, which direction you flew and how well you sleep, among other things. In a study of two elite athletes, one was ready for intensive training on the fourth day after a flight from Prague in the Czech Republic to Beijing in China, six hours east.
Swimming in the sea, a lake or an outdoor pool is gentle on stiff joints.
A city bike is an easy way to see the city and raise your heart rate a little.
Stairs and hills give a good workout, but save them for day 2 or 3.
A hike near the city gives you both daylight and nature. Keep it short and easy for the first few days. If you need ideas, we have gathered 25 countries with free nature and hikes with no entry fee.
Stay awake until around 9–10 pm local time. If you need a nap, the CDC recommends 20–30 minutes. Longer naps can ruin your night's sleep.
Do not train hard late in the evening during the first days, as it can make it harder to fall asleep.
Drink water steadily, and extra if it is hot.
Eat on local time, and choose light food after your morning session.
Coffee before lunch, not after, and go easy on alcohol. According to the CDC, both can contribute to dehydration, which can make jet lag worse.
Long flights carry a small but real increase in the risk of blood clots in the legs. See a doctor if you get:
Swelling, pain, warmth or redness in one calf or one thigh.
Chest pain or sudden shortness of breath. In that case, call the local emergency number immediately.
Symptoms can appear in the days and weeks after the trip. Do not train through such symptoms, and do not train if you have a fever.
This article gives general advice and does not replace medical help.
Save running routes, parks with outdoor gyms, beach promenades and swimming spots near your hotel, and add them to your itinerary day by day. Here is how it works: save places for your trip with Saved in Travel Outenza. Set aside day one for an easy outing and the big activities for day two or three. If you travel together, everyone sees the same plan and knows when to train together. Travelling as a group? Read our guide on how to plan a group trip without the chaos.
Yes, but easy. A 20–40 minute walk or easy jog outdoors in daylight is the best session on day one. Wait with intervals and hard sessions until your body is ready, usually day three at the earliest.
Little sleep, dry cabin air, sitting still and a body clock in the wrong time zone stress the body. This often shows up as a higher resting and night-time heart rate and lower HRV on your watch. The numbers should improve within a few days.
When your resting heart rate is close to normal, HRV and sleep are no longer getting worse, and the warm-up feels normal. Look at the trend over several days and listen to your body, rather than relying on one number.
Zone 1–2 for the first days. If you have not measured your max heart rate, use the talk test: you should be able to speak in full sentences. In a hot climate your heart rate is higher at the same pace, so slow down.
Training outdoors in daylight helps because you combine movement with light, the most important signal for resetting your body clock. Train in the late morning after eastbound flights and in the late afternoon after westbound flights.
Garmin offers Jet Lag Adviser on many newer watches, including the Forerunner and Fenix series. You enter the trip in the Garmin Connect app. Other brands track sleep, resting heart rate and HRV, which you can use in the same way.
Cover photo: Hugo Polo/Pexels
Collect the places that inspire you, build a day-by-day itinerary and keep every ticket, booking and note in one place.
Free to start. Save the places from this article to a trip, plan your days and share the trip with your travel companions.
Training After a Long Flight: How to Use Your Heart Rate Watch
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