ADHD doesn’t run on consistency. It runs on cycles. Energy comes in waves and so does focus, motivation, and capacity. By embracing the rhythm of beast days and slug days, you stop fighting your nature and start working with it.
Some days, you’re unstoppable. Other days, even replying to a message feels like too much. For AuDHDers (those with both ADHD and Autism), this ebb and flow isn’t laziness, it’s lived experience.
As Kayla, an AuDHD coach and neurodivergent advocate, calls them: “beast days” and “slug days.”
Instead of resisting this rhythm, what if we embraced it?
“When I say ‘go with the energy’, it’s like if something feels good, do it. You know, like if it’s not a full body ‘yes’, then it’s a ‘no’. ”
— Kayla Oughton, ADHDifference
Why It Works
Neurodivergent nervous systems often swing between hyperdrive and shutdown. High-output days can feel incredible… productive, clear, focused. But they come with a cost. Without rest and rhythm, burnout follows.
Slug days aren’t setbacks, they’re a natural recalibration.
Understanding and accepting these patterns can help reduce shame, manage cognitive fatigue, and build in rest before you crash.
When to Use It
This strategy is helpful when:
- You’re swinging between hyper-productivity and burnout
- You feel guilty for needing rest after a burst of energy
- You’re struggling to plan because your energy is unpredictable
- You’re trying to force consistency but it keeps backfiring
Recognising your natural energy rhythm allows you to build a system that anticipates fluctuation, rather than punishing it. It’s a practical way to honour how your brain really works.
How to Practice It
-
Name the Pattern
Label your “beast days” and “slug days” — and track them. You’ll start to see a rhythm. Knowing when a slump is likely can help you prepare. -
Match Energy with Tasks
On beast days, lean into high-cognition work: creative projects, deadlines, decision-making.
On slug days, give yourself permission to rest, or do low-stakes tasks: admin, dishes, soft routines. -
Plan for the Crash
Build buffer time after intense work. -
Respect Cognitive Fatigue
Even positive experiences burn energy. Recognize that over-stimulation (meetings, noise, social interaction) can be draining — not because you’re broken, but because your brain is working overtime. -
Protect the Slug Days
Slug days aren’t lazy days, they’re necessary. Make space for them with comfort, quiet, nourishment, and no shame.
The Science Behind It
Adults with ADHD often experience cycles of high energy and motivation followed by periods of deep fatigue. This fluctuation is linked to the ongoing effort required to manage executive dysfunction — regulating attention, emotions, and tasks can be mentally and physically exhausting.
Intense focus states (hyperfocus) may bring short bursts of productivity, but are often followed by crashes in energy and mood, contributing to a pattern commonly referred to as ADHD burnout. These cycles reflect challenges with dopamine regulation and sustained attention, not a lack of effort or resilience.
Research suggests that ADHD brains experience mental fatigue more readily because everyday tasks require more cognitive effort to sustain attention and regulate distraction than they do in neurotypical brains.1
💬 Final Thought
ADHD doesn’t run on consistency. It runs on cycles. Energy comes in waves and so does focus, motivation, and capacity. By embracing the rhythm of beast days and slug days, you stop fighting your nature and start working with it.
You don’t have to be “on” all the time to be effective. Rest is not failure. It’s recovery. It’s fuel. It’s the space that makes the next surge possible. Trust the cycle. Honour the ebb and flow.
🎧 Listen to the full episode with Kayla Oughton (S2E36) here 🎧
REFERENCES
- Green, R. (2024). Understanding Mental Fatigue in ADHD