Module Overview
This module establishes the conceptual scaffolding for the entire course — how functional/lifestyle medicine differs from conventional care, the biological foundation of aging (the 12 Hallmarks of Aging), the HSI framework used to organize case information throughout the course, and the lifespan/healthspan distinction that drives everything that follows.
Learning Objectives
By the end of this module, learners will be able to:
- Explain how functional/lifestyle medicine's core question differs from conventional medicine's symptom-management model
- Describe the 12 Hallmarks of Aging and their three-category structure (primary, antagonistic, integrative)
- Distinguish lifespan from healthspan and explain why this drives clinical priorities
- Apply the original HSI Healthspan Model, and the HSI Method, to organize and act on a patient/client case — including sequencing all five Method steps end to end on a realistic case
Lessons in this module
Module Table of Contents
Module 1 contents
All five Foundations lessons in teaching order. Lessons 1.3 and 1.4 are published and link directly from this overview.
Practical takeaways — where to start this week
Module 1 is largely conceptual. These five things give you something concrete to do in the week after finishing it, rather than waiting until later modules for anything actionable.
- 1
Run the HSI Healthspan Model on one real case
Lesson 1.4Pick one client (or yourself) and map a current symptom across all five domains — Biological State, Regimen, The Exposome, Mind, Connection & Purpose — using the Lesson 1.4 worked example as a template. This is the single most directly transferable skill in the module. Pay particular attention to Connection & Purpose: it is the domain most often skipped in a standard intake.
- 2
Ask one “why” question you would not normally ask
Lesson 1.1In your next client conversation (or a reflection on your own health), practise the reframe: instead of “what’s wrong,” ask “why is this happening in this person, right now.” Note what it surfaces that a standard intake would not.
- 3
Identify one hallmark-relevant habit already in play
Lesson 1.2Using the sleep example from Lesson 1.2, pick one current daily habit — sleep, meals, movement — and name which hallmark(s) of aging it is plausibly influencing. This builds the “one behaviour, multiple mechanisms” thinking the course rests on.
- 4
Reframe one goal from lifespan to healthspan language
Lesson 1.3Take a health goal a client (or you) has stated and rewrite it in healthspan terms — not “avoid getting sick,” but “stay independently mobile, sharp and active until X.” Lesson 1.3’s framing is more motivating for most people; this is a low-effort way to test that in a real conversation.
- 5
Start a running case file
Lesson 1.1Begin a simple written log — even one paragraph — for one real or prototype client, capturing their timeline (antecedents, triggers and perpetuators, per Lesson 1.1’s “timeline over snapshot” point). This becomes the seed of the Module 1 case assignment and a habit worth carrying into every later module.
Where to go next: continue to Module 2: Gut & Microbiome. Full guidance for the whole Foundational Certificate lives in Module 3, the certificate’s closing module.
Assessment
Module 1 quiz
12 questions across all five lessons · 70% to pass · unlimited retakes · graded instantly in your browser
- Lesson 1.1
Q1.What is the starting question that distinguishes functional and lifestyle medicine from a conventional symptom-management model?
- Lesson 1.1
Q2.Which set correctly names the three practical implications of the functional/lifestyle reframe?
- Lesson 1.1
Q3.A client’s full blood panel returns within reference range while they still feel unwell. What is the most accurate interpretation?
- Lesson 1.2
Q4.Which of the following is a primary hallmark of aging?
- Lesson 1.2
Q5.What defines the antagonistic hallmarks as a category?
- Lesson 1.2
Q6.Which hallmarks were added in the 2023 update to the original 2013 framework?
- Lesson 1.3
Q7.What distinguishes healthspan from lifespan?
- Lesson 1.3
Q8.What does the term “morbidity gap” describe?
- Lesson 1.4
Q9.Which domain of the HSI Healthspan Model covers social support, relationships, community and belonging?
- Lesson 1.4
Q10.In the HSI Method, which step comes directly before Personalise?
- Lesson 1.5
Q11.In the worked case, what did the Integrate step reveal that the domain-by-domain Assess had not?
- Lesson 1.5
Q12.What is the purpose of the Measure step?
0 / 12 answered
Short-answer reflection
These two are not auto-graded. Write your answer, then reveal the marking guidance and assess it yourself.
Describe one chronic symptom you have seen (in a client or in yourself) and what the question “why is this happening in this person, right now?” surfaces that a standard diagnosis would not.
Take one health goal stated in lifespan terms and rewrite it in healthspan terms.
Module 1 case assignment
Case vignette — Daniel Whitfield, 52, secondary-school head of department
Daniel books an initial consultation after what he calls “a rough eighteen months.” He was promoted two years ago and now manages a department of fourteen, describing the role as “all admin, no teaching — the part I actually liked.” He reports waking at 4am most nights and not getting back to sleep, a persistent ache in both shoulders, and gaining around a stone since the promotion. He eats lunch at his desk most days, usually a meal-deal sandwich, and has three or four glasses of wine on weekday evenings “to switch off.” His last GP visit, eight months ago, flagged blood pressure of 142/88 and “borderline” cholesterol; he was told to “keep an eye on it.” He has no recent bloods beyond that. He used to play five-a-side football weekly but stopped when the promotion started, and mentions that most of the people he socialised with came from that team. His father died of a heart attack at 58. When asked what he wants, he says: “I want to feel like I did at forty, and I’d like to still be here for my kids.”
What to submit
A short written response, roughly 400–600 words. There is no single correct answer — your reasoning and sequencing are what is being assessed.
- 1Map Daniel’s case across all five HSI Healthspan Model domains — Biological State, Regimen, The Exposome, Mind, Connection & Purpose. Note what sits in each domain and what is missing from the picture.
- 2Sequence all five HSI Method steps against the case: Assess, Integrate, Prioritise, Personalise, Measure. Integrate should name at least one cross-domain connection, not a list of separate findings.
- 3Identify at least one relevant hallmark of aging plausibly in play, and say which domain it connects to.
- 4Prioritise down to one or two realistic starting points, and state the markers you would measure and when you would reassess.
Practitioner-track learners: additionally identify a suggested referral point or clinical consideration — what would you not manage yourself, and who would you involve?
Self/client audit worksheet
Fill this in for yourself or one real client. It is not a graded assignment — it is a working tool for applying the module immediately. A printable version is in the downloads below.
Timeline
Lesson 1.1- Antecedents — family history, early-life factors, long-standing predispositions
- Triggers — a clear event, illness or change that preceded the current issue
- Mediators and perpetuators — what is keeping the issue going now
HSI Healthspan Model mapping
Lesson 1.4- Biological State — possible mechanisms, hallmark(s) of aging involved
- Regimen — diet, movement, sleep, substances
- The Exposome — exposures, living and work conditions
- Mind — stress load, emotional state, sense of control
- Connection & Purpose — social support, relationships, community, belonging
HSI Method
Lessons 1.4–1.5- Integrate — how are the domains above influencing one another?
- Prioritise — which one or two factors are the highest-leverage starting point?
- Personalise — what would a plan fitted to this person’s real life look like?
- Measure — what would you track, and when would you reassess?
Lifespan vs. healthspan framing
Lesson 1.3- Stated goal, in the client’s own words
- Reframed in healthspan terms — independence, function, capability
One next step
Module 1- One realistic, low-risk starting point — a practice exercise in applying root-cause thinking, not a treatment plan
Downloads for this module
- Download PDF
HSI Healthspan Model — blank case mapping template
Lesson 1.4All five domains with space to write, a cross-domain connections strip and the five Method steps. Print or fill in digitally.
- Download PDF
The 12 Hallmarks of Aging — one-page reference chart
Lesson 1.2All twelve hallmarks grouped as primary, antagonistic and integrative, with the 2023 additions marked.
- Download PDF
Lifespan vs. Healthspan — explainer infographic
Lesson 1.3The morbidity gap, the compression-of-morbidity hypothesis and what each means for clinical priorities, on a single page.
- Download PDF
Module 1 self/client audit worksheet
Module 1Parts A–D: timeline, five-domain mapping, the Method steps, healthspan reframe and one next step. A working tool, not a graded assignment.
- Download PDF
Module 1 case assignment brief
Module 1Daniel Whitfield’s vignette with the full submission instructions and the additional practitioner-track requirement.
Whole curriculum overview
Module Table of Contents
Modules 1–7
Modules 1–3 form the Foundational Certificate. Modules 4–7 complete the Diploma.