Health Library / Lifestyle
This content is for education only and is not medical advice. I'm a fitness coach, not a physician. Talk to your doctor before starting any medication, hormone, supplement, or new exercise program, especially if you have a medical condition or take prescriptions.
A client came to me plateaued. Training six days a week, eating clean, getting nowhere and feeling worse each month. His plan was to add a seventh day.
We cut him to four. Six weeks later he set personal bests on three lifts.
He wasn't undertrained. He was under-recovered, and at 51, with a job that ate him alive and two teenagers, the gym was the only stressor he could control — so he kept turning it up.
This is the thing almost nobody accounts for. Your body has one stress response, and it doesn't care about the source.
A hard squat session, a brutal quarter at work, a sick parent, four hours of sleep, a difficult marriage — these all draw from the same account. Your nervous system doesn't file training stress separately from life stress. It's one number.
Which means the training load that worked beautifully last year can be too much this year, with nothing about the program having changed. A program is only appropriate relative to everything else you're carrying, and most people never adjust it when life gets heavier. They just conclude they're getting old.
Cortisol is not a villain. It's essential, it follows a daily rhythm, it's supposed to spike — that's what gets you out of bed and through a hard set.
The problem is when it never comes down. Chronically elevated stress signalling works against muscle retention, encourages fat storage around the middle specifically, disrupts sleep, suppresses immune function, and blunts recovery. You'll notice that list looks a lot like the "my hormones are failing" list from earlier in this library. There's a reason.
The signs run together, but if several of these have showed up at once, you're overreaching:
Performance sliding despite training hard. Resting heart rate up several beats from your normal. Sleep breaking down, particularly waking around 3am. Getting sick more than usual. Motivation gone — not the ordinary "don't feel like it" but genuine dread about a session you used to enjoy. Soreness hanging around for days. Irritability that your family has noticed before you did.
One of those is a bad week. Four of them at once is a message.
Take the deload. Every fourth or fifth week, cut the volume meaningfully and keep moving. This is not lost time. Adaptation happens in recovery, and lifters who never back off spend years stuck at the same numbers.
Walk. The most underrated recovery tool there is, and it's free. Twenty or thirty minutes, outdoors, no headphones occasionally. It lowers stress without adding to the training load.
Breathe deliberately. Slow breathing with a longer exhale than inhale, a few minutes, genuinely shifts your nervous system out of fight-or-flight. It sounds too simple to matter. It costs you four minutes to find out.
Protect sleep first. See the previous module. Stress and sleep feed each other in both directions.
Train, but train appropriately. Exercise is one of the best stress management tools available — that's not in tension with anything above. Hard training when you're already flattened is a withdrawal. Moderate training when you're stressed is a deposit. Learn which day you're having.
You're going to encounter this term, usually attached to a supplement or a protocol.
It isn't a recognized medical diagnosis. The underlying idea — that chronic stress exhausts your adrenal glands until they can't produce cortisol — has been examined and it hasn't held up. Reviews of the research have not found support for it, and the major endocrinology bodies don't recognize it.
I'm not telling you your exhaustion is imaginary. It's obviously real. I'm telling you that label leads somewhere unhelpful, because the symptoms it gets applied to are also produced by things that are very real and very treatable — thyroid disease, anemia, sleep apnea, depression, and genuine adrenal disorders, which do exist and are diagnosed with actual tests.
If you're exhausted in a way that a deload and better sleep don't touch, that's a doctor visit, not a supplement. There's a real answer in there somewhere and a made-up diagnosis will stop you looking for it.
Last updated September 30, 2026