You’ve had a cold or the flu and your symptoms have begun to subside. Your nose has stopped dripping, your cough is clearing and your head and muscles no longer ache.

You’re ready to get off the couch. But is it too early to go for a run? Here’s what to consider when getting back to exercising after illness.

Exercise can boost your immune system – but not always

Exercise reduces the chance of getting respiratory infections by increasing your immune function and the ability to fight off viruses.

However, an acute bout of endurance exercise may temporarily increase your susceptibility to upper respiratory infections, such as colds and the flu, via the short-term suppression of your immune system. This is known as the “open window” theory.

A study from 2010 examined changes in trained cyclists’ immune systems up to eight hours after two-hour high-intensity cycling. It found important immune functions were suppressed, resulting in an increased rate of upper respiratory infections after the intense endurance exercise.

So, we have to be more careful after performing harder exercises than normal.

Can you exercise when you’re sick?

This depends on the severity of your symptoms and the intensity of exercise.

Mild to moderate exercise (reducing the intensity and length of workout) may be OK if your symptoms are a runny nose, nasal congestion, sneezing and minor sore throat, without a fever.

Exercise may help you feel better by opening your nasal passages and temporarily relieving nasal congestion.

However, if you try to exercise at your normal intensity when you are sick, you risk injury or more serious illness. So it’s important to listen to your body.

If your symptoms include chest congestion, a cough, upset stomach, fever, fatigue or widespread muscle aches, avoid exercising. Exercising when you have these symptoms may worsen the symptoms and prolong the recovery time.

If you’ve had the flu or another respiratory illness that caused a high fever, make sure your temperature is back to normal before getting back to exercise. Exercising raises your body temperature, so if you already have a fever, your temperature will become high quicker, which makes you sicker.

If you have COVID or other contagious illnesses, stay at home, rest and isolate yourself from others.

When you’re sick and feel weak, don’t force yourself to exercise. Focus instead on getting plenty of rest. This may actually shorten the time it takes to recover and resume your normal workout routine.

I’ve been sick for a few weeks. What has happened to my strength and fitness?

You may think taking two weeks off from training is disastrous, and worry you’ll lose the gains you’ve made in your previous workouts. But it could be just what the body needs.

It’s true that almost all training benefits are reversible to some degree. This means the physical fitness that you have built up over time can be lost without regular exercise.

To study the effects of de-training on our body functions, researchers have undertaken “bed rest” studies, where healthy volunteers spend up to 70 days in bed. They found that V̇O₂max (the maximum amount of oxygen a person can use during maximal exercise, which is a measure of aerobic fitness) declines 0.3–0.4% a day. And the higher pre-bed-rest V̇O₂max levels, the larger the declines.

In terms of skeletal muscles, upper thigh muscles become smaller by 2% after five days of bed rest, 5% at 14 days, and 12% at 35 days of bed rest.

Muscle strength declines more than muscle mass: knee extensor muscle strength gets weaker by 8% at five days, 12% at 14 days and more than 20% after around 35 days of bed rest.

This is why it feels harder to do the same exercises after resting for even five days.

But in bed rest studies, physical activities are strictly limited, and even standing up from a bed is prohibited during the whole length of a study. When we’re sick in bed, we have some physical activities such as sitting on a bed, standing up and walking to the toilet. These activities could reduce the rate of decreases in our physical functions compared with study participants.

How to ease back into exercise

Start with a lower-intensity workout initially, such as going for a walk instead of a run. Your first workout back should be light so you don’t get out of breath. Go low (intensity) and go slow.

Gradually increase the volume and intensity to the previous level. It may take the same number of days or weeks you rested to get back to where you were. If you were absent from an exercise routine for two weeks, for example, it may require two weeks for your fitness to return to the same level.

If you feel exhausted after exercising, take an extra day off before working out again. A day or two off from exercising shouldn’t affect your performance very much.

Ken Nosaka, Professor of Exercise and Sports Science, Edith Cowan University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

In the 2007 film The Bucket List Jack Nicholson and Morgan Freeman play two main characters who respond to their terminal cancer diagnoses by rejecting experimental treatment. Instead, they go on a range of energetic, overseas escapades.

Since then, the term “bucket list” – a list of experiences or achievements to complete before you “kick the bucket” or die – has become common.

You can read articles listing the seven cities you must visit before you die or the 100 Australian bucket-list travel experiences. https://www.youtube.com/embed/UvdTpywTmQg?wmode=transparent&start=0

But there is a more serious side to the idea behind bucket lists. One of the key forms of suffering at the end of life is regret for things left unsaid or undone. So bucket lists can serve as a form of insurance against this potential regret.

The bucket-list search for adventure, memories and meaning takes on a life of its own with a diagnosis of life-limiting illness.

In a study published this week, we spoke to 54 people living with cancer, and 28 of their friends and family. For many, a key bucket list item was travel.

Why is travel so important?

There are lots of reasons why travel plays such a central role in our ideas about a “life well-lived”. Travel is often linked to important life transitions: the youthful gap year, the journey to self-discovery in the 2010 film Eat Pray Love, or the popular figure of the “grey nomad”.

The significance of travel is not merely in the destination, nor even in the journey. For many people, planning the travel is just as important. A cancer diagnosis affects people’s sense of control over their future, throwing into question their ability to write their own life story or plan their travel dreams.

Mark, the recently retired husband of a woman with cancer, told us about their stalled travel plans:

We’re just in that part of our lives where we were going to jump in the caravan and do the big trip and all this sort of thing, and now [our plans are] on blocks in the shed.

For others, a cancer diagnosis brought an urgent need to “tick things off” their bucket list. Asha, a woman living with breast cancer, told us she’d always been driven to “get things done” but the cancer diagnosis made this worse:

So, I had to do all the travel, I had to empty my bucket list now, which has kind of driven my partner round the bend.

People’s travel dreams ranged from whale watching in Queensland to seeing polar bears in the Arctic, and from driving a caravan across the Nullarbor Plain to skiing in Switzerland.

Nadia, who was 38 years old when we spoke to her, said travelling with her family had made important memories and given her a sense of vitality, despite her health struggles. She told us how being diagnosed with cancer had given her the chance to live her life at a younger age, rather than waiting for retirement:

In the last three years, I think I’ve lived more than a lot of 80-year-olds.

But travel is expensive

Of course, travel is expensive. It’s not by chance Nicholson’s character in The Bucket List is a billionaire.

Some people we spoke to had emptied their savings, assuming they would no longer need to provide for aged care or retirement. Others had used insurance payouts or charity to make their bucket-list dreams come true.

But not everyone can do this. Jim, a 60-year-old whose wife had been diagnosed with cancer, told us:

We’ve actually bought a new car and [been] talking about getting a new caravan […] But I’ve got to work. It’d be nice if there was a little money tree out the back but never mind.

Not everyone’s bucket list items were expensive. Some chose to spend more time with loved ones, take up a new hobby or get a pet.

Our study showed making plans to tick items off a list can give people a sense of self-determination and hope for the future. It was a way of exerting control in the face of an illness that can leave people feeling powerless. Asha said:

This disease is not going to control me. I am not going to sit still and do nothing. I want to go travel.

Something we ‘ought’ to do?

Bucket lists are also a symptom of a broader culture that emphasises conspicuous consumption and productivity, even into the end of life.

Indeed, people told us travelling could be exhausting, expensive and stressful, especially when they’re also living with the symptoms and side effects of treatment. Nevertheless, they felt travel was something they “ought” to do.

Travel can be deeply meaningful, as our study found. But a life well-lived need not be extravagant or adventurous. Finding what is meaningful is a deeply personal journey.

Names of study participants mentioned in this article are pseudonyms.

Leah Williams Veazey, ARC DECRA Research Fellow, University of Sydney; Alex Broom, Professor of Sociology & Director, Sydney Centre for Healthy Societies, University of Sydney, and Katherine Kenny, ARC DECRA Senior Research Fellow, University of Sydney

This article is republished from The Conversation under a Creative Commons license. Read the original article.