452: Rest, Adjust, or Push? What to Do When You’re Tired

As runners, fatigue is something we all deal with. The tricky part isn’t whether we’ll feel tired—it’s figuring out what to do about it.

Do we push through?
Do we adjust the workout?
Or is it actually a day to rest?

In this episode, we wanted to talk about how we think through that decision as coaches and runners ourselves—especially because the recent daylight saving time change reminded us how even small disruptions can affect our bodies more than we expect.

How Daylight Saving Time Affects Runners

Losing just one hour of sleep might not seem like a big deal, but research shows that the shift around daylight saving time is associated with increases in injuries, car accidents, and even heart attacks.

That’s a pretty strong reminder that our bodies are sensitive to sleep and circadian rhythm changes.

And yet, as runners, we often ignore those signals. We look at the training plan and think, “Well, the workout says tempo today, so I guess that’s what I’m doing.”

But good training isn’t about blindly following a plan. It’s about learning how to adjust when your body needs something different.

The key question becomes: how do we respond when we feel that fatigue?

Not All Fatigue Is the Same

One of the biggest things we try to teach runners is that fatigue isn’t one-size-fits-all.

We tend to see three main types.

Type 1: Normal Training Fatigue

This is the kind that actually comes with good training.

Your legs might feel a little heavy at the start of the run. You might feel some soreness from a previous workout. But mentally you feel fine, and once you start moving and warm up, the run usually starts to feel better.

This type of fatigue is completely normal and usually safe to train through. In fact, it’s often part of the process of building fitness.

Type 2: Accumulated Fatigue or Stress Overload

This one is a little trickier.

It’s when training stress combines with life stress.

You might notice things like:

• Poor sleep

• Elevated resting heart rate

• Irritability

• Brain fog

• Easy paces suddenly feeling hard

In this situation, your body isn’t just dealing with running stress—it’s dealing with everything else too.

This is where decision-making becomes important. Sometimes the smartest move is adjusting the workout rather than pushing through it.

Type 3: Red Flag Fatigue

Then there are the clear warning signs.

This might look like:

• Sharp or unusual pain

• Illness symptoms

• Deep exhaustion

• Lingering soreness that isn’t improving

• Dizziness

• Severe brain fog

When we see these kinds of signals, it’s usually a sign that the body needs rest and recovery, not more training stress.

Ignoring these signs is often what turns small issues into bigger injuries.

Our Three-Question Decision Filter

When runners ask us how to decide what to do on tired days, we like to keep it simple.

We usually run through three quick questions.

1. Is this physical fatigue or nervous system fatigue?
   Heavy legs from training are very different from feeling mentally drained or overwhelmed.

2. If I start slow, does it feel better?
   Normal training fatigue often improves once you warm up.

3. What is the intention of today’s run?
   Is this supposed to be a hard workout? An easy aerobic run? A recovery day?

When you answer those questions honestly, the decision often becomes much clearer.

When It’s Okay to Push Through

There are definitely days where pushing through is appropriate.

Usually that looks like:

• Heavy legs or normal soreness

• Decent sleep

• Feeling better after warming up

• Mentally just not feeling motivated

Sometimes the fatigue is just resistance, not a true recovery need. In those cases, getting out the door and moving often helps.

When It’s Better to Adjust

Other days call for a middle ground.

If easy runs feel unusually hard, if life stress is high, or if you’re just feeling “off,” it may be better to adjust rather than force the workout.

That could mean:

• Shortening the run

• Lowering the intensity

• Swapping a hard workout for an easy run

• Choosing cross-training instead

The goal is to keep the consistency without digging a deeper fatigue hole.

When It’s Time to Rest

And sometimes the best training decision is simply rest.

If you’re dealing with illness symptoms, sharp pain, deep exhaustion, or major nervous system fatigue, pushing through usually backfires.

This is especially true for runners over 40. Recovery becomes a much bigger part of the training equation, and ignoring it can stall progress quickly.

Rest isn’t a setback. It’s part of the process that allows the body to adapt.

What About Missed Workouts?

This is one of the most common concerns we hear.

Runners worry that if they skip a workout, they’ll lose fitness or fall behind.

But the reality is: most missed workouts don’t matter.

You almost never need to “make up” a missed run. Trying to cram it back into the week usually creates more fatigue than benefit.

In our experience, the real progress killer isn’t the occasional missed workout—it’s chronic overload.

Consistency over time always wins.

The Real Goal

Fatigue will always be part of running. That’s not something we can eliminate.

But what we can do is get better at recognizing it and responding appropriately.

Some days that means pushing through.

Some days it means adjusting.

And some days it means resting.

The runners who stay healthy and improve long term are the ones who learn how to make those decisions honestly.

Because in the end, smart, consistent training will always beat perfect training.