Hey Fit Pros,
We talk a lot about strength. About reps and load and progressive overload. But what if I told you the real magic happens after the session ends?
Sleep is one of the most underrated (and misunderstood) tools in your training toolbox. It’s not just about feeling rested. Sleep impacts strength, endurance, metabolism, memory, and overall longevity.
This isn’t just my opinion—it’s backed by recent research published in Nature’s journal npj Biological Timing and Sleep, which highlights how consistent exercise improves sleep quality, and how better sleep, in turn, improves physical performance, cardiovascular health, and brain function.
Here is a summary of the article that is important to know for trainers:
Sharper Brain, Better Gains
Sleep strengthens neural pathways that support coordination, memory, and reaction time—vital for learning new movement patterns and preventing falls.More Recovery = More Strength
Deep sleep (slow wave sleep) is when muscle repair happens. That soreness after a great session? Without enough quality sleep, your client won't bounce back—and progress stalls.Heart Health Happens at Night
Sleep is when heart rate, blood pressure, and cortisol levels regulate. Chronic sleep deprivation leads to elevated cardiovascular risk—even in active people.Improved Focus, Mood & Motivation
Want clients to stay consistent? Help them sleep. Sleep boosts mood, reduces stress, and keeps willpower intact. That’s half the battle with long-term adherence.Hormone Reset
Sleep helps regulate hormones like growth hormone, melatonin, and cortisol—all of which play key roles in training outcomes, appetite, and inflammation.
⏰ Timing of Workouts Matters
Exercise boosts sleep—if it’s timed right. Avoid intense sessions within 2 hours of bedtime (unless your client is already a great sleeper). Research has shown that exercising 4 hours before sleep can also have detrimental effects on sleep. Morning workouts help regulate circadian rhythms for most people.
🌡 Use Body Temp to Your Advantage
Post-exercise cooling promotes sleep. Encourage clients to end with a slower-paced cool-down or warm shower to aid in thermoregulation.
📉 Track Energy, Not Just Output
If a client’s strength suddenly plateaus, ask about sleep. Poor sleep leads to poor lifts. Simple questions like “How rested do you feel in the morning?” can reveal a lot.
🛏️ Include Sleep in Your Intake Forms
Want to be taken seriously as a trainer who understands longevity? Ask about sleep quality from day one. It’s as critical as nutrition or injuries.
🧘♀️ Teach Wind-Down Routines
Stretching, box breathing, or even a short mobility session at night can act as a sleep cue. Add “recovery habits” to your client’s training plan.
Brain Health Podcast – I recorded a podcast for Perimenopausal Mamas, all about brain health. Check it out here or wherever you get your podcast!
My canfitpro Article – Read my latest piece on longevity through fitness and cognitive training on page 26.
Books:
Podcast:
Thinking of Becoming a Trainer?
My next canfitpro Personal Training Specialist course runs virtually from June 26–29.
📍 Sign up here: https://www.canfitpro.com/personal-training-specialist/ by using ID# 129313.
Until then, keep training, because life is science but also magic!
Dr. Loïse
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