π€ Cancer Related Fatigue and What You Can Do About It
Sep 11, 2026
You made it through treatment. As a high achieving woman, you assumed that you'd bounce back. So why do you feel this overwhelming exhaustion at three o'clock in the afternoon?
If that question lands somewhere in your chest, here is the first thing I tell every survivor who asks it: this is not ordinary fatigue that a good night's sleep should have been able to solve. It is not you being weak. What you're feeling has a name, a mechanism, and most importantly — a set of things that genuinely help. Most of them are not what you've been told.
I still recall the intense fatigue following chemotherapy and radiation therapy. If it hadn't been for my dog πΆ Jake, I probably would have stayed in bed for days. I came to the realization that I could not go back to the grueling 12-14 hour work days. I simply did not have the stamina for that.
π© This isn't ordinary tired
First, this condition has a name. What you're likely experiencing isn't everyday tiredness — it's a well-documented condition called cancer-related fatigue. And here is the single most important thing to understand about it, the fact that should change how you respond: cancer-related fatigue is not relieved by rest or sleep the way normal tiredness is.
You can sleep nine hours and still wake up feeling like you've spent the night wading through wet sand. Ordinary tiredness lifts when you rest. This doesn't, and that difference is the whole point.
Cancer related fatigue is far more common than anyone tells you. Research suggests that roughly four in ten survivors are still living with meaningful fatigue many years after treatment has ended. It can be very disabling and in fact can impact a survivor's ability to return back to work. If this describes where you are right now in your journey, you are not the strange exception who "should be over it by now." You are the rule nobody prepared you for.
Why does it happen? The truth is there are many factors involved in cancer related fatigue. The treatment itself, lingering inflammation, disrupted sleep and circadian rhythm, months of deconditioning from doing less, and the sheer emotional weight of everything you carried and so much more. That's precisely why there's no single magic fix. Not one supplement, one exercise, one diet.
β Before I go further: if your fatigue is new, severe, or suddenly worse, please don't simply push through it. Get it evaluated. Sometimes exhaustion is pointing at something specific and treatable — low iron, a thyroid that shifted, a medication effect. Advocating for that workup isn't being difficult. It's being thorough.
π Why "just rest more" backfires
Here's the advice most well meaning people will give you: rest more. You've been through a lot, so you need to take it easy. This advice sounds so reasonable that it's hard to argue with.
But for cancer-related fatigue, resting your way out of it often makes it worse. When we stop moving, the body deconditions — muscles weaken, circulation slows, the whole system grows less efficient. So the fatigue deepens, which makes you rest even more, which deepens it further. It's a spiral, and I watch capable women fall into it constantly.
As a high-achieving woman who is so used to being well put together, this can be a strange experience. You've been conditioned to push hard.
One of the best-supported ways to ease cancer-related fatigue is not more rest. It's gentle movement.
The evidence behind this is strong. Aerobic activity, light strength work, yoga, tai chi — study after study shows these help reduce cancer-related fatigue. Try to avoid intense workouts for now. Take a leisurely ten-minute walk around the block. Perform chair yoga instead of getting down on the mat. Perform slow stretches before your first meeting of the day. The goal here is circulation and rhythm. This is not the time to start training for anything — you're gently reminding your body how to move fluid, oxygen, and energy again.
So start absurdly small. Small and consistent beats heroic and abandoned every single time.
Here are three levers that can help move the needle with cancer related fatigue.
β Lever one: sleep that actually restores
The first lever is sleep — but let's focus on sleeping smarter, not simply more.
Somewhere between a third and half of survivors struggle with disrupted sleep, and a big piece of that is your internal clock- your circadian rhythm. This is the body's master timekeeper. During cancer treatments, your circadian rhythm can get scrambled during treatment. Maybe there were nights you spent in bright rooms, days off schedule, a heightened sympathetic nervous system running hot. So chasing more hours in bed frequently misses the real problem.
Instead, we work to rebuild the circadian rhythm:
- Anchor your wake time. Get up at the same time every day, weekends included. This single habit resets more than most people expect.
- Get light early in the day. Morning light within an hour of waking tells your body clock the day has begun — and helps you feel sleepy at the right time that night.
- Protect your wind-down. The last hour before bed belongs to calming down your nervous system. Lights low, screens down, breath deeply and slower.
β Lever two: eating for steady energy
The second lever is nutrition. Here's the thing, there is no single diet out there that will dismantle cancer related fatigue. What you do want to do is- aim for steady over spiky. A lot of those afternoon crashes are due to blood sugar roller coasters.
- Pair your carbohydrates with protein and fat, so energy releases slowly instead of spiking and crashing.
- Avoid skipping meals to "power through" — there is truly no benefit to trying to survive on an empty tank.
- Drink water. Dehydration impersonates fatigue astonishingly well.
Make nutrition simple, steady, repeatable. Anything more tailored — especially given your treatment history — is a conversation worth having with your care team or a dietitian who understands oncology.
β Lever three: budget your energy like it's finite
The third lever may be the most important one for the women reading this: budget your energy as though it's finite — because, for now, it is.
Picture your day as a purse holding a set number of coins. First here's a reality you need to accept- cancer shrank the purse, at least for this season. You may have been used to starting the day at a ten right out of the gate. By noon, you've spent every coin and then run the rest of the day on fumes and willpower. Willpower isn't energy. It never was.
So a reasonable strategy is to build the day around your current capacity, not the capacity you had five years ago:
- Put your most demanding work in your best window — for many people that's mid-morning.
- Intentionally schedule recovery between big efforts.
- Practice the hardest executive skill of all: learn to say "not today," without a paragraph of justification.
π«οΈ The unmentioned part underneath all of it
Beneath the fatigue and the sleep and the energy leak, there's the grief. You may be quietly mourning the woman you once were. The one who had it all together- who could run a company whilst at the same time running a marathon. She was real. It's allowed to hurt that she's not who you are right now.
Here's a way to reframe this. Yes, cancer may have left it's lingering effects. But through this journey, you are becoming someone just as capable. This is an invitation to reinvention.
As a survivor, I am on this journey of acceptance and reinvention. This is exactly why I have decided to focus on survivorship.
I'm creating the CLEAR™ Survivorship Institute to focus on the parts of rebuilding after cancer that no one prepares you for. The fatigue. The brain fog. The sleep disruption. The energy. The mindset. The fear of recurrence. The challenges of returning to work. This is where the work starts in survivorship.
I'm my first client and I'm sharing my journey as I rebuild — and I'd love for you to walk it beside me.
If you're a cancer survivor and this resonated with you, but you have no idea where to start. Pick one thing — take one ten-minute walk, pick one anchored wake time, create a day end wind down routine.
Follow along this September and beyond as I introduce the CLEAR™ Survivorship Institute, and share this with a survivor who keeps apologizing for being tired.
π Ready to rebuild — with support built for survivors?
I'm currently accepting clients. Let's talk about where you are and where you want to be — or save your place for what's coming next.
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