Exercise and rest
Why rest is as important as running: quick answer
The recovery phase is what makes the body fitter and stronger. Exercise will not work without sleep, rest and nutrition
Those of us embarking on a fitness journey might see exercise as an instant boost, whereas it is the recovery phase that does your body good.
A hard run leaves your muscles damaged, your energy stores depleted and your resolve tested. What makes you fitter is what your body does afterwards: repairing that damage and rebuilding itself slightly stronger than before. Training provides the stimulus, recovery provides the adaptation. Skip the second half and you’re just accumulating stress with no return on it.
Why you shouldn’t run every day
We’ve all seen those enthusiastic joggers on New Years Day, embarking on a new fitness regime. A few days in and many of them will have given up. But if they decide to run every day, it’s just a matter of time before things go wrong.
Two days turn into five, then it’s a week. Energy is up, endorphins are flowing, and there’s a satisfying ache in the legs that feels like progress. In week two the aches develop and the ankles start to feel sore. Runs that felt easy now feel like wading through treacle. By week three or four, our runner is physically battered and the endorphins give way to rushes of regret. Niggling aches and pains become injuries, and the fitness journey is derailed.
The heart and lungs have adapted quickly to this cardiovascular workout, making the body feel ready to go further and faster. But tendons, ligaments and bones adapt far more slowly and the body can break down if overloaded. It’s like a car engine having plenty left, but the tyres and brakes can only take so much. Leave the audience wanting more.
This is why easing into fitness matters so much. A beginner running 2-3 days a week with rest or gentle activity in between will still be at it 6 months later, while the everyday runner burns out. Consistency beats intensity, and consistency is only possible when your body can keep up with your ambition.
| Signal | What it likely means | What to do |
|---|---|---|
| Ordinary muscle soreness (DOMS) that eases as you warm up | Normal adaptation | Train as planned |
| Mild tiredness or low motivation that lifts once moving | Everyday fatigue | Train, adjust intensity if needed |
| Soreness still severe after 72 hours | Incomplete recovery | Easy session or rest day |
| Elevated morning resting heart rate | Accumulated fatigue or oncoming illness | Swap to active recovery |
| Head cold (above the neck, no fever) | Minor illness | Light session only, if you feel up to it |
| Fever, chesty cough, body aches | Systemic illness | Full rest until recovered |
| Fatigue that deepens during the warm-up | Body not ready | Stop — use the ten-minute rule |
| Sharp, stabbing, or joint/bone pain | Possible injury | Stop; rest and monitor |
| Pain that alters your movement pattern or worsens mid-session | Likely injury | Stop; seek advice if persistent |
| Dizziness or chest discomfort | Medical concern | Stop; seek medical advice |
When to rest and when to push
Those on a fitness drive are prone to not properly reading the body’s signals. It can be difficult to know when discomfort is normal and when it’s a warning. Here are a few scenarios and what course of action is typically recommended:
Keep going and push through
Ordinary muscle soreness that eases as you warm up, mild tiredness after a poor night’s sleep, low motivation that lifts once you get moving and general stiffness.
Reduce activity or rest
Soreness still severe after three days, an elevated morning resting heart rate, fatigue that deepens rather than lifts during the warm-up. Also ailments such as chesty cough, fever, body aches, and mounting life stress.
Definitely stop
Sharp or stabbing pain, especially pain that alters your movement pattern, anything that worsens as the session goes on. Also dizziness or chest discomfort, which warrants medical advice.
Why sleep is important for recovery
There is no legal supplement out there that is better for recovery than sleep. During deep sleep, the body releases the majority of its daily growth hormone, driving muscle repair and tissue regeneration. Sleep is when memory of motor skills consolidates, like a download of the day’s progress.
Research on athletes has linked chronic sleep restriction to slower reaction times, reduced endurance, impaired glucose metabolism and slower muscle recovery. One study of adolescent athletes found those sleeping fewer than eight hours a night were roughly 1.7 times more susceptible to injury.
For most adults training regularly, seven to nine hours is the target, and athletes in heavy training often benefit from more. If you’re choosing between a 5am workout on five hours’ sleep or the extra sleep itself, the sleep is very often the better training decision.
Why protein is important around exercise
Muscle repair requires amino acids, and the evidence favours spreading protein intake across the day rather than obsessing over a window immediately after a session. Protein amounts of 20-30 g per meal is roughly what an active person needs, and eating a protein-rich meal within a couple of hours of training is plenty for most people.
Compare protein levels in various foods using our simple protein comparison tool.
The mindset shift
Rest is not the absence of training. it is a crucial part of it. It’s the part where the improvement actually happens. Success rarely comes from those who train hardest in any given week; the successful ones are those who are still training, uninjured and enthusiastic, a year later. Programme your recovery with the same seriousness you programme your workouts, and the fitness takes care of itself.
