Why You Feel More Tired in the Fall and What Exercise Can Do About It
As the days get shorter and temperatures drop, your energy levels might be dropping too. Here's why it happens and four simple ways to feel more energized this season.
Why Does Fall Make Us Feel So Tired?
Have you ever noticed that once October arrives, getting out of bed becomes a little harder? Your afternoon energy seems to disappear, the couch becomes increasingly attractive, and suddenly that evening workout doesn't sound quite as appealing.
You're not imagining things.
As summer transitions into fall, our bodies begin responding to changes in daylight, temperature, and daily routines. One of the biggest factors is our circadian rhythm, the internal biological clock that helps regulate when we feel awake, alert, and ready for sleep.
Sunlight plays an important role in keeping this clock synchronized. As daylight hours decrease, changes in light exposure can influence our sleep patterns, mood, and energy levels.
For some people, these changes are barely noticeable. For others, they can contribute to seasonal fatigue, reduced motivation, or more significant mood changes.
The good news? Exercise is one of the most accessible tools we have to support our energy, improve sleep quality, and maintain a healthier routine throughout the colder months.
Here are four practical strategies you can start using today.
1. Get Moving Early and Let Natural Light Do Its Job
One of the simplest ways to combat seasonal sluggishness doesn't require a gym membership, expensive supplements, or another cup of coffee.
It starts with daylight.
Your brain uses natural light as a signal to help regulate your sleep and wake cycle. When mornings become darker and we spend more time indoors, we may receive fewer of those important signals.
Try this: Spend 10 to 20 minutes outdoors during the morning, ideally combining that time with a brisk walk.
You don't need to turn it into an intense cardio session. Walk your dog, take a short stroll before work, or enjoy your morning coffee outside.
Even on cloudy days, outdoor daylight can provide a useful signal to your internal clock.
Why it works: Morning light helps reinforce your body's natural wakefulness rhythm, while physical activity can improve alertness and support better sleep over time.
The goal isn't to burn hundreds of calories before breakfast. It's simply to give your body a reason to wake up and get moving.
2. Stop Waiting to Feel Motivated Before Exercising
Here's something we frequently remind clients at Prolean Training: motivation is rarely as dependable as consistency.
During the fall, it's easy to negotiate with yourself.
I'll work out tomorrow. I'm tired today. It's already dark outside. Maybe I'll start again Monday.
Sound familiar?
The problem is that waiting for the perfect combination of energy, motivation, and free time can leave you doing less and less.
Interestingly, physical activity can actually help improve the very things that make you reluctant to exercise in the first place.
Research from the CDC shows that regular physical activity supports better sleep, reduces symptoms of anxiety, and contributes to improved mental well-being.
Try this: Create a 20-minute minimum workout rule.
On days when you're not feeling particularly energetic, commit to just 20 minutes of purposeful movement. This could include:
A brisk walk or moderate cycling session.
A short full body strength workout.
A combination of mobility exercises and resistance training.
A few rounds of squats, rows, presses, and core exercises.
Sometimes those 20 minutes turn into a complete workout. Other times, 20 minutes is all you need.
Both count.
Building an effective fitness routine isn't about making every workout your hardest. It's about creating a level of consistency your lifestyle can realistically support.
3. Use Strength Training to Build Energy, Not Just Muscle
When people think about improving their energy, they often turn immediately to caffeine, vitamins, or getting more sleep.
While nutrition and rest certainly matter, physical conditioning deserves a place in that conversation.
Think about your body like a vehicle. If your engine isn't well maintained, ordinary driving requires more effort.
Your body works in a somewhat similar way.
As your cardiovascular fitness, muscular strength, and overall physical capacity improve, everyday activities can become less physically demanding.
Climbing stairs, carrying groceries, walking longer distances, and maintaining an active lifestyle may begin to feel easier.
Try this: Include two or three structured strength training sessions each week, focusing on major muscle groups.
A balanced routine could include squats, hip hinges, pushing movements, pulling movements, and core exercises.
Combine this with moderate cardiovascular exercise, such as walking, cycling, or rowing, throughout your week.
Remember that more exercise isn't automatically better. If you're already exhausted, pushing through intense workouts every day can make recovery more difficult.
At Prolean Training, we emphasize individualized strength training programs that account for each person's fitness level, recovery needs, schedule, and long term health goals.
The objective isn't simply to leave a workout exhausted. It's to gradually build a stronger, more capable body that makes everyday life feel easier.
4. Protect Your Sleep by Creating a Consistent Evening Routine
One of the more frustrating parts of seasonal fatigue is that you can feel tired all day and somehow still struggle to sleep well at night.
Although shorter days can influence our biological clock, our evening habits often contribute to the problem.
Late caffeine, inconsistent bedtimes, excessive screen exposure, and irregular schedules can all interfere with healthy sleep patterns.
And while exercise generally improves sleep quality, an extremely intense workout immediately before bedtime can make falling asleep more difficult for some people.
Try this: Create a simple evening routine that prepares your body for sleep.
Start by keeping your bedtime and wake time reasonably consistent, even on weekends.
Dim bright lights as bedtime approaches, avoid caffeine late in the day, and consider incorporating gentle stretching, reading, or a relaxing walk into your evenings.
If possible, schedule your more demanding workouts earlier in the day, particularly if you've noticed that late training affects your sleep.
The goal is to create a predictable rhythm your body can follow.
Better sleep can support exercise recovery, while regular exercise can support better sleep. These habits often reinforce one another.
A Final Thought: Don't Let the Season Dictate Your Health
Fall is a beautiful time of year, especially here in Colorado. But between shorter days, colder mornings, busy schedules, and the approaching holidays, it's also a time when healthy routines can quietly begin to disappear.
The solution isn't necessarily to train harder, buy another supplement, or force yourself into an unrealistic schedule.
Sometimes the most effective changes are surprisingly simple.
Get outside earlier. Move even when motivation is low. Build strength consistently. Give your body a regular sleep schedule.
And remember, feeling tired occasionally is normal, but persistent or unexplained fatigue shouldn't automatically be blamed on the season. If your exhaustion is ongoing, worsening, or accompanied by significant mood changes, it's worth discussing with a healthcare professional.
At Prolean Training, we believe fitness should make your life better, not simply give you another obligation to manage.
Whether you're looking to rebuild your energy, improve your strength, or establish healthier habits, having a personalized exercise plan and professional guidance can make consistency much easier.
This fall, don't focus exclusively on what you want your body to look like.
Focus on how you want your body to feel.
Research behind the article
The explanations about daylight, sleep, seasonal changes, and exercise are supported by these resources:
CDC: Benefits of Physical Activity. Evidence on physical activity, sleep, mood, and overall health.
CDC
NIH: What Makes You Sleep?. How light and circadian rhythms influence alertness and sleep.
NHLBI, NIH
NIH: Circadian Rhythm Disorders and Treatment. Guidance on light exposure, sleep schedules, and physical activity.
NHLBI, NIH
SAMHSA: Seasonal Affective Disorder. The relationship between seasonal changes, fatigue, and mood.
SAMHSA
