Is Fatigue Increasing Your Risk of Injury?

Most people think injuries happen because they were unlucky. Maybe they stepped the wrong way, lifted something awkwardly or pushed themselves a little too hard.
While those moments can certainly trigger an injury, there’s often something happening behind the scenes that makes the body more vulnerable. One of the biggest causes is fatigue.

What is fatigue?

Fatigue isn’t just feeling tired after a busy day. It can come from:
● Poor sleep
● Stress
● Long work hours
● Intense exercise
● Looking after young children
● Illness
● Not recovering properly between training sessions

In other words, fatigue is anything that reduces your body’s ability to perform at its best.

How does fatigue increase injury risk?

Think of your body like a high-performance car. When everything is working well, it corners smoothly, brakes efficiently and responds quickly.
When you’re fatigued, it’s like driving with worn tyres and slower brakes. You can still drive but your margin for error becomes much smaller.

Research has shown that fatigue can affect:

• Reaction time

Your brain processes information more slowly when you’re tired. Whether you’re playing netball, running, lifting weights or simply stepping off a curb, delayed reactions can increase the risk of awkward movements.

• Balance and proprioception

Fatigue makes it harder for your body to control movement.

You may notice you’re tripping more often, landing less smoothly or feeling ‘clumsy’ towards the end of a workout or sporting match.

• Muscle performance

Tired muscles don’t absorb force as effectively. Instead of sharing the workload efficiently, certain muscles may switch off earlier while others try to compensate, placing extra stress on joints, tendons and ligaments.

The role of sleep

Sleep is one of the most powerful recovery tools we have. It’s during sleep that our bodies repair muscle tissue, regulate hormones involved in recovery and consolidate the learning of new movement patterns. Studies have consistently shown that people who regularly get inadequate sleep have a higher risk of sporting injuries than those who sleep well.
If you’re training hard but sleeping poorly, you’re only doing half the job. Fatigue doesn’t just affect athletes. You don’t have to be an elite athlete for fatigue to matter.

Some of the people most affected include:
● Healthcare workers finishing long shifts (yes even your physios get injured!!!)
● Parents of young children.
● Tradies working physically demanding jobs.
● Office workers juggling high stress and poor sleep.
● Over-exercisers.

Your body doesn’t distinguish between physical fatigue and life fatigue, they are both
intertwined.

What can you do?

The goal isn’t to avoid exercise when you’re tired. Movement is still incredibly important.
Instead, learn to adjust your expectations.

If you’ve had several poor nights of sleep or you’re feeling physically and mentally exhausted:

● Reduce the intensity rather than skipping movement altogether.

● Focus on good technique instead of chasing personal bests.

● Allow extra recovery between hard sessions.

● Prioritise hydration and nutrition.

● Listen to those early warning signs rather than pushing through them.

Sometimes the best training session is the one you modify.
Speak with your physio if you need some advice on activity modification with your training if you’re experiencing fatigue.