It’s ‘Housekeeping’ for Your Body and Mind
We exercise for all sorts of reasons: to get fit, to feel relaxed, to meet people, to try to lose weight, to get out of the house, etc. But how many of us do it with the express intention of improving our immune system?
Most people who exercise regularly have an idea that their efforts will generally have a beneficial effect on their physique, their strength, flexibility, mental wellbeing and possibly their social life but how many realise the impact it can have on building up their body’s resistance to illness?
So Can Exercise Boost Your Immune System?
Research has shown that here is a positive link between regular, moderate-intensity exercise and the support it can provide to your immune system. (Int J Environ Res Public Health. 2022 Jun.)
We’ve already acknowledged that exercise is generally good for your body and your mind. It is most beneficial to your immune system when the exercise you undertake is regular and of moderate intensity for up to an hour at a time. If you can do this on a daily, or on alternate days, basis then your immune system will be on a continuous “upward roll” (so to speak!).
However…
It’s not such good news if you push yourself through extended training sessions of high intensity. Studies have indicated that rigorous and concentrated exercise activities can impair the efficacy of your immune system and “overpower” it. Exercise at high intensity is a stressor and, without adequate recovery, can increase the levels of the hormone Cortisol in the blood, thus actually exacerbate stress symptoms such as illness and fatigue
How Much Exercise?
The NHS recommends that adults should aim to:
· do strengthening activities that work all the major muscle groups (legs, hips, back, abdomen, chest, shoulders and arms) on at least 2 days a week
· do at least 150 minutes of moderate intensity activity a week or 75 minutes of vigorous intensity activity a week
· spread exercise evenly over 4 to 5 days a week, or every day
· reduce time spent sitting or lying down and break up long periods of not moving with some activity
You can also achieve your weekly activity target with:
· several short sessions of very vigorous intensity activity
· a mix of moderate, vigorous and very vigorous intensity activities
And, importantly, their advice includes the caveat that you “Make sure your activity and its intensity are appropriate for your fitness”.
All PTs recommend that their clients have clearance from their GPs before they embark on an exercise pathway; especially if they have any medical conditions or concerns. I always ask after my client’s health and how they feel generally prior to a session. Their response plays a vital role in helping me fine-tune their workout to ensure that we don’t overdo the intensity beyond their physical capabilities on that day.
So, Exercise and the Immune System…
Promotes Cellular Immunity
Moderate-intensity aerobic exercises increase the circulation of immune cells in the body. This promotes cellular immunity which enables the body to be better prepared for any infections that may come your way. They can also help detect them earlier.
Usually helps you sleep better
Lack of sleep (even if seems fairly insignificant) can have a negative impact on your immune system.
This can cause a reduction in antibodies and the generation of proteins that regulate the immune system leading to greater risk of infection and above average incidence of cardiovascular and metabolic conditions.
If you’re exercising according to the NHS guidelines – and especially under the watchful eye of your PT – you are giving yourself a fair chance of a good night’s sleep which is excellent news for your immune system!
Reduces Risk of Heart Disease, Diabetes and Other Conditions
Engaging in regular exercise can play a significant part in lowering your chances of developing cardiovascular problems and type 2 diabetes with attendant benefits of a lower resting heart rate and an increase in “good” cholesterol.
This in turn helps your immune system to be better prepared to fight off illnesses.
Stress-Buster
This is one which most of us are aware of, but it still deserves a mention in the context of the impact on our immune system.
By reducing the rate at which stress hormones are released and stimulating the brain’s nerve impulses which control our moods and our behaviour, moderate-intensity exercise can make a really positive contribution to the strength of our immune system.
Stress and depression can have serious implications for our immune system so anything that helps us stay “upbeat” is to be welcomed.
Exercise reduces inflammation
When the body experiences a threat of a disease the immune system’s normal reaction is to generate inflammation to “attack” the “invader”. It has been found that moderate-intensity exercise is effective in managing the immune response and so reducing the inflammation.
(Interestingly, on the other hand, studies have shown that prolonged, high-intensity exercise are likely to cause an increase in inflammation!)
Finally, Dr Nieman, in his study published in the Journal of Sport and Health Science said, “Exercise really is a housekeeping activity, where it helps the immune system patrol the body and detect and evade bacteria and viruses”.
Acknowledgements and research
https://www.healthline.com
www.nhs.uk
British Journal of Sports Medicine