Episode 29 — The Behaviour Change Playbook for Type 1 Diabetes

In this episode

Many people start a new phase with motivation — then reality happens: hunger, fatigue, alarms, hypoglycaemia, stress, and the frustrating truth that type 1 diabetes often punishes good behaviour enough to make you want to stop trying. In this episode, John and Vanessa unpack a behaviour-change approach that works with human psychology and diabetes physiology rather than demanding heroic willpower.

The five principles

• Principle 1 — Design beats discipline: build systems that reduce the daily decision load.
• Principle 2 — Cues beat grit: prompts in the environment outperform trying to remember.
• Principle 3 — Reduce threat before effort: if it feels too hard or too scary, avoidance tends to win.
• Principle 4 — Hawk or Owl, Carrot or Stick: pick accountability and feedback that actually fits your nervous system.
• Principle 5 — Community support, not shame: small, safe networks tend to beat noisy online environments where comparison dominates.

Key themes

1. Design beats discipline

Willpower is finite for everyone — and type 1 diabetes burns through it faster because the cognitive load is relentless. The fix tends not to be “try harder” — it is reducing the number of fresh decisions you need to make each day.

• Turn repeated choices into default rules — simple heuristics you already trust
• Make goals concrete and realistic — SMART goals are useful here if they reduce pressure rather than create it
• Think in next-step goals (e.g., 30% to 40% time in range) rather than leaps that trigger avoidance

2. Cues beat grit

Humans tend to take the path of least resistance. If the environment does not prompt the behaviour, you are relying on memory under fatigue — which is a practical joke on yourself.

• Place the thing you forget next to the thing you always do
• Piggyback new behaviours onto existing routines (shower, kettle, brushing teeth)
• Kids often need visual, engaging cues; adults often need friction removed and prompts made obvious

3. Reduce threat before effort

If the goal feels too big, too shaming, or too emotionally loaded, avoidance behaviours tend to rise — especially in diabetes, where you can do everything right and still get a glucose reading that looks like failure.

• Lower the demand level until you can engage without dread — small wins first, then scale
• Reframe CGM from judgement to data: this is not a moral grade, it is information
• Use learning language: “What happened? What is the likely driver? What is one tweak for next time?”

4. Hawk or Owl, Carrot or Stick: pick what fits you

Accountability is not one-size-fits-all. Some people thrive with frequent check-ins. Others do better with spaced reflection. Same with feedback: some want direct truth, others need encouragement first or they shut down.

• Choose the support style that fits you — not the one you think you should need
• Make it explicit: how often do you want check-ins, and what style of feedback helps rather than harms?

5. Community support, not shame

Diabetes is isolating, and isolation tends to increase burnout and avoidance. But community can heal or harm depending on whether it is psychologically safe and reality-based.

• Small, trusted groups tend to outperform large spaces where nobody has real accountability
• Share the difficult days as well as the good ones — it normalises reality and reduces shame
• The goal is support and learning, not comparison and perfection

A five-step exploration framework

Step 1 (Design): What is one behaviour you want to change?

Step 2 (Reduce threat): What is the smallest version of that change you could try for seven days without dread?

Step 3 (Cues): What existing routine will you piggyback onto — and what physical cue will you place where you cannot miss it?

Step 4 (Accountability): Do you need a hawk or an owl — and do you respond best to carrot or stick?

Step 5 (Community): Who is one person or small group you can be honest with this week without shame?

About the guest

Vanessa Haydock is The Diabetic Health Coach — a psychology and applied behaviour analysis background, certified behaviour analyst, personal trainer, and coach supporting people with type 1 diabetes with sustainable behaviour change.

• The Diabetic Health Coach website
• @diabetic_health_coach on Instagram

Related episodes

• Episode 7 — Fundamentals of The GNL
• Episode 8 — Activity snacking and time in range
• Episode 14 — Insulin resistance and T1D
• Episode 15 — C-Peptide and T1D
• Episode 16 — Driving: 5-to-Drive
• Episode 18 — Exercise without fear
• Episode 25 — Partying with T1D
• Episode 21 — SPARK: Five-to-Drive-Change
• Episode 26 — Community and vulnerability