Resetting a flat day, in the time it takes to make coffee, is acheiveable.  

Sales has a specific mix of pressures that make flatness almost built into the job. Here's what's going on:

1. Rejection is constant, not occasional
Most jobs don't involve being told "no" multiple times a day, every day. Sales does. Even when it's not personal, the brain's threat-detection system doesn't fully distinguish "rejected this offer" from "rejected me" — repeated no's wear down the same circuitry that responds to social exclusion.

2. Income tied to performance = chronic low-grade cortisol
When your pay (and sometimes your job security) rides on numbers you don't fully control — market conditions, buyer mood, competitor pricing — your baseline stress hormone stays elevated. Chronic cortisol elevation is strongly linked to low mood, fatigue, and that flat, joyless feeling, even without an acute crisis.

3. Emotional labor without recovery time
Good sales reps regulate their own state constantly — staying upbeat, curious, and warm on command, call after call, regardless of how they actually feel. This is genuine emotional labor, and unlike other emotionally demanding jobs, there's often no built-in recovery period between calls to actually process or discharge that effort.

4. Dopamine feast-or-famine cycle
A big win creates a real dopamine spike — genuine high. But dopamine systems adapt fast, and after the high, baseline can dip below normal for a while (this is a known pattern with any reward-driven system). Reps chasing the next close are often riding a chemical rollercoaster rather than a stable mood.

5. Isolation, even in "people" jobs
Sales looks social from the outside, but a lot of it is transactional connection — talking at people toward an outcome, not mutual relationship. That's not the same as the kind of connection that actually replenishes people, so reps can feel oddly lonely despite talking to dozens of people a day.

6. Identity fused with outcomes
When your sense of competence is tied to a number that resets to zero every month or quarter, there's no way to "bank" past success emotionally. Every period starts back at baseline — which, over years, can create a background hum of never quite arriving anywhere.

The practical upshot: the resets from the neuroscience list (physiological sigh, movement, sunlight, naming the state) matter more in sales than in a lot of professions, precisely because the job structurally produces more dips to recover from. It's less about willpower and more about actively managing a nervous system that's being asked to do more regulation than most jobs demand.