The Truth About Morning Exercise: Why Your Circadian Rhythm Matters More Than Your Alarm Clock
By Remi — You don't need a meal plan. You need someone who actually explains why. ·
Stop Fighting Your Biology
Every time I log onto my socials, I see the same thing: fitness influencers at 4:30 AM, staring into the abyss of a dark gym, preaching that “if you aren’t winning the morning, you’re losing the day.”
Listen, I love a good sunrise. But as someone who spent years studying sports nutrition and the physiology of performance, I’m here to tell you that the obsession with the ‘crack-of-dawn’ workout is often doing more harm than good. If you are a natural night owl, dragging yourself out of bed at 5 AM to lift heavy weights isn't ‘discipline’—it’s a recipe for cortisol spikes, mediocre performance, and eventual burnout.
The Physiology of the Morning Workout
When we talk about morning exercise, we aren't just talking about motivation. We’re talking about your core body temperature, your hormonal profile, and your central nervous system (CNS).
When you wake up, your body temperature is at its lowest. Your joints are stiffer, and your synovial fluid—the ‘oil’ for your joints—is viscous from hours of inactivity. This is why you feel like a rusty robot for the first hour of your day. If you jump straight into a heavy squat session, you’re asking your body to perform at 100% capacity when it’s physically primed for, at best, 60%.
Plus, there’s the cortisol factor. Cortisol naturally peaks in the morning to help you wake up. Strenuous, high-intensity exercise adds another layer of systemic stress. For some, this feels like an energy boost. For others, it’s like pouring gasoline on a fire that’s already burning too hot.
Rethinking the 5 AM Club
Does this mean morning exercise is bad? Absolutely not. It means you need to be strategic about what you’re doing based on who you are.
Growing up in a Haitian-Canadian household, food was the center of our world, but movement was just part of the flow of the day. We didn't obsess over the ‘perfect’ time to move; we just moved. If you want to exercise in the morning, stop trying to crush a personal best and start focusing on priming your system for the day ahead.
If you have to train early because that’s the only time your schedule allows—which is the reality for many of my clients in Toronto juggling long commutes and family—here is how you do it without wrecking your health:
1. The 'Warm-Up' Is Your Entire Workout
Forget the five-minute jog. If you’re waking up early, your warm-up needs to be at least 15 to 20 minutes. We’re talking dynamic mobility work: cat-cows, bird-dogs, thoracic rotations, and light glute bridges. You need to physically raise your body temperature before you touch a barbell. If you don't have time for a proper warm-up, you don't have time for the hard session. It's that simple.
2. Fuel the Machine, Don't Run on Fumes
I’ve heard all the arguments for fasted cardio. While there’s a place for it in specific athletic protocols, for the average person, it’s usually just a way to feel lightheaded and underperform. Your brain and your muscles need glucose. Even a small piece of fruit or a bit of Greek yogurt 15 minutes before you start can make a world of difference in your power output and your mood. Don’t starve your body; it’s the only one you’ve got.
3. Prioritize 'Flow' Over 'Grind'
If you train early, consider moving towards more ‘flow-state’ modalities. Think kettlebell flows, mobility-based strength work, or steady-state movement that keeps your heart rate in Zone 2. This builds aerobic capacity and clears out the ‘brain fog’ without triggering a massive stress response. Save the high-intensity, ‘I-might-vomit’ circuits for when your body temperature is naturally higher later in the day.
4. Light Is Your Best Friend
If you’re training in the dark, you’re fighting your internal clock. If possible, get some bright light exposure immediately after your session. It helps regulate your circadian rhythm and tells your body, ‘Okay, the day has started, let’s normalize those hormones.’
Listen to Your Own Data
At the end of the day, fitness isn't about fitting into a box designed by someone on the internet who doesn't know your history, your sleep quality, or your stress levels. It’s about finding the ‘why’ behind your habits.
If you train in the morning, do it because it makes you feel capable and prepared, not because some influencer told you that you’re lazy if you’re still in bed at 7 AM. If your body isn't responding well to early morning training, stop forcing it. Adjust your schedule, shift your priorities, and watch how your performance improves when you finally start working with your biology instead of against it.
How do you feel after your morning movement? Does it give you energy, or does it leave you crashing by noon? Let’s talk about it—drop a comment below or shoot me a DM. I’m curious to hear what your rhythm actually looks like.