"Tired all the time." "No energy." "I want to be fitter." After strength, this is the biggest family of things people write to us, and the honest answer has two parts: some tiredness is a fitness problem, some is not, and it matters which one you have before you try to train your way out of it.
The tiredness that is not fitness
Poor sleep, low iron, an underactive thyroid, low mood, some medications and several other things all cause the tired-all-the-time feeling, and exercise will not fix them on its own. If your tiredness has come on over weeks rather than years, if it does not lift after a good night, or if it comes with other new symptoms, see your GP first. The NHS page on tiredness, linked below, lists what to look for. Get that checked, then train.
The tiredness that is
The other kind builds slowly. You do a bit less, so you can do a bit less, so you do a bit less again. A body that has not been asked to work hard for a few years finds everything hard: the stairs, the garden, a full day out. That is not age. It is a loop, and it runs in both directions.
Strength is the fastest way back into it, because a stronger muscle uses a smaller share of what it has for the same task. The hill that takes 80 per cent of your legs today takes 50 per cent of legs that are stronger, and you arrive at the top with breath to spare. Our article on why stairs leave you breathless explains the mechanism.
A week that builds stamina
- Two strength sessions. Legs, back and carries. Forty minutes each. These build the engine.
- Three brisk walks. Twenty to thirty minutes, brisk enough that you can talk but not sing. Add a hill every couple of weeks.
- Sleep protected. The strength arrives while you rest. Our guide to recovery and rest over 50 explains why the days off matter as much as the sessions.
Expect the first fortnight to make you a little more tired, not less. By week three most people notice the afternoon dip has moved later, and by week six the same walk is easier and the same day out no longer costs the next one. If it never lifts, that is a GP conversation, not a sign to push harder. Our article on managing fatigue through movement covers the days when even a walk feels like too much.
Frequently asked questions
Will exercise not make me more tired?
For a week or two, a little. After that, the opposite, because the same daily tasks are using a smaller share of what you have. Start lower than you think you should and add slowly.
Should I start with cardio or strength?
If you already walk, add strength. If you do neither, start with two short strength sessions and gentle walks on other days. Strength gives you the legs to do more of everything else.
How do I know it is working?
Pick a walk you do already. Same route, same pace, and notice the breathing at the top of the hill. That number changes before anything else does.
References
- NHS. Tiredness and fatigue. nhs.uk
- NHS. Benefits of exercise. nhs.uk
- NHS. Physical activity guidelines. nhs.uk
