Your nervous system legit can’t tell the difference between a fast long run and an argument with someone at work. Both spike your cortisol and both fill the same bucket.
Your body doesn’t know you’re “just stressed about work”. It only knows that the “stress” bucket is full.
This is real science (even though it feels woo-woo), it comes from cognitive behavioral therapy, and it’s called the Stress Bucket Model. Psychologists use it to explain anxiety and burnout. But flip it for running and it changes how you think about every single training week.
Your body runs one stress bucket. Not a “running bucket”, “work bucket”, “life bucket”, etc. Just one. Your 90-minute long run goes in there, and the fight with someone in your family, and the three nights of garbage sleep, AND the work deadline, AND the alcoholic beverages you told yourself were recovery for said “stress”. (Ironically, those alcoholic beverages destroyed your sleep and caused you to start the stress cycle once again the next morning.
There are four things happening inside this “stress bucket system”, and once you see them it’s going to be a huge unlock for you moving forward.
First, stressful events fill the bucket (duh). Workouts, work, bad sleep, bad nutrition, travel, grief, anxiety, moving, changing jobs, young kids, teenage kids with attitudes, you get it. It all counts equally because to your nervous system, cortisol is cortisol. Your body doesn’t file each stressor in a separate folder. but instead just throws it into the laundry pile of dirty stress clothes.
Second, the bucket overflows when it gets too full. That’s when you encouter what I call “The Three-headed horseman” of overtraining. This is when you get injured, get sick, burn out. This can also be not hitting speed session intervals that you crushed 4 weeks ago or just being angry and negative about a lot of things in life. The training log looks fine, nothing is out of bounds but the bucket wasn’t fine.
Third, you have a release valve tap. Sleep, rest days, easy runs, good/nutritious/filling food (all veggie salads on hard training days it not healthy), connection with humans, actual fun, etc. These can drain the stress bucket (aka a good thing that we want). Sleep does most of the heavy lifting here, and it’s not negotiable. Cut sleep, cut adaptation and shave down months and possibly years of your life. Your body doesn’t adapt during the run. It adapts after, while you’re recovering. Skip that whole important part, and you’re just accumulating load with nowhere for it to go. Remember (For the 149th time) – Training = Work + Rest, not Work + Work.
And fourth (this is the part most runners miss), your bucket size is super individual to you. A 22-year-old with zero job stress, running once to twice a week, and getting nine hours of sleep each night, will def a huge bucket. A 47-year-old running (literally) through marathon training, plus a messy divorce, two kids, moving houses, and an average of five hours of sleep, will have a much smaller stress bucket. None of those are a character flaw. It’s just the math of your current life.
Also, remember, the goal isn’t zero stress. That’s not a life, and that’s not realistic. Humans have evolved quite well to handle stress because there is eustress and distress. Eustress is doing things that you enjoy that give you energy, and distress is doing the things you usually don’t like and drain you. If we don’t stress ourselves in someway we actually start declining.
Don’t avoid it, but instead work with it. The goal is to prevent the bucket from overflowing by consistently opening the release valve and being honest about how full it already is before you add another hard session.
Stressful week at work? That’s a variable in your run training that needs to be adjusted for now. Or don’t adjust for it and keep ignoring the bucket and see how it goes.
I’ll be over here taking pre-emptive rest days, sipping on Roobious tea, and meditating daily. To each is their own.
Fix this by learning more about proper recovery here.
