Ad platforms make radius targeting look exact. Real gym travel is shaped by roads, traffic, transit, neighbourhood boundaries, work routes, safety, parking, price, and the uniqueness of the service. Location signals are also estimates, not a perfect fence.
Set gym ad geography from the real catchment of suitable members, then test distance or travel-time zones on qualified leads, attended visits, paid members, collected contribution, and out-of-area leakage. There is no universal radius for every gym or campaign.
Start with the gym catchment mapping guide, then apply the gym CAC ceiling to each zone.
Separate three kinds of location evidence
- Platform delivery location: the location signals the advertising system used.
- Lead-stated location: the neighbourhood, postal code, workplace, or branch preference the prospect provides.
- Member behaviour: the address or route evidence, visits, payment, retention, and branch use in the gym’s own records.
None is perfect. Platform signals can be approximate. Lead details can be incomplete. Home address alone can miss a gym near the person’s office or commute. Use them together and state the uncertainty.
Map the current member catchment first
For consenting, appropriately handled records, group current and recently joined members into practical areas. Avoid publishing or sharing individual addresses. Analyse aggregated zones such as neighbourhoods, postal areas, travel-time bands, or transport corridors.
Check:
- share of active members by zone;
- joins and losses by cohort;
- visit frequency and preferred time;
- membership and service mix;
- collected contribution;
- route, parking, transit, and peak-hour barriers;
- why members say they chose the location;
- whether work, home, school, or another routine drives the trip.
Historical density does not prove an area caused success. It is a starting hypothesis.
Build non-overlapping test zones
| Zone | Definition | Travel reality | Existing evidence | Offer | CAC ceiling | Primary question |
|---|---|---|---|---|---|---|
| Core | ||||||
| Near | ||||||
| Extended | ||||||
| Special corridor |
Distance rings are one option, but they can overlap or divide real neighbourhoods awkwardly. Postal areas, suburbs, wards, or travel-time catchments may be easier to interpret. Keep zones mutually understandable and document unavoidable overlap.
Review the platform’s location option
Some location settings can include people who are physically present, regularly present, or showing interest in the selected place. For a local walk-in gym, a presence-focused setting may better match the objective than broad location interest. A destination facility or relocation offer may have a different use case.
Whatever option is chosen:
- record it in the test;
- inspect geographic reports;
- compare with lead-stated and attended locations;
- look for out-of-area leakage;
- review exclusions carefully;
- do not describe the boundary as exact.
The Google Search Ads guide connects these controls to query and landing-page intent.
Use comparable zone experiments
Hold these as stable as practical:
- offer and material terms;
- service and branch;
- creative promise;
- landing page or form;
- qualification rule;
- response process;
- campaign timing;
- paid-member definition;
- review window.
Budget allocation may need to reflect audience size, so equal spend is not always possible. Record delivery differences such as impressions, auction cost, and frequency. Do not compare a tiny dense core with a large distant ring as though only distance changed.
Copy the distance-band ledger
| Zone | Spend | Clicks | Valid leads | Qualified | Attended | Paid members | Collected | Fully loaded CAC | Out-of-area | Decision |
|---|---|---|---|---|---|---|---|---|---|---|
| Core | ||||||||||
| Near | ||||||||||
| Extended |
Also check early retention and attendance when enough time has passed. A distant zone may join after a strong offer but fail to use the gym consistently.
Calculate marginal zone economics
Do not ask only whether the full campaign is below its CAC ceiling. Ask whether expanding into the next zone adds viable paid members.
Marginal media cost per paid member = additional media spend after expansion ÷ additional verified paid members attributable under the chosen reporting model
Then add sales, offer, delivery, creative, and tool cost to assess fully loaded CAC. Attribution remains imperfect, especially when zones overlap or people move between devices and routes. Treat the result as decision evidence, not causal proof.
Work through a fictional test
This example is fictional and is not an industry benchmark.
A neighbourhood gym tests a core area, a nearby transit corridor, and an outer distance band. The transit corridor is farther in kilometres than part of the outer band but produces more attended evening tours because one direct route passes the gym. The outer band produces cheap clicks and weak attendance.
The owner keeps the corridor, narrows the outer band, and checks whether message, service, or response differed before concluding distance caused the gap. The winning shape is not a clean circle, and that is acceptable.
Adjust for the service being sold
General access, a specialist coach, rehabilitation-related service, competitive training, a pool, women-only timing, children’s programs, and corporate proximity can create different travel behaviour. Verify that advertising and staff qualifications support the claim being made.
A rare, high-involvement service may draw from farther away but still have limited capacity. A low-price general membership may depend more heavily on convenience. Run separate economics rather than applying one radius to the entire gym.
Protect privacy while mapping
- use only data needed for the decision;
- aggregate areas before sharing reports;
- limit access to identifiable member and lead records;
- do not upload member addresses to an ad platform without an appropriate purpose, notice, basis, and approved method;
- define retention and deletion;
- do not target or exclude areas as a proxy for sensitive health or personal traits;
- handle child and family data under appropriate safeguards.
The geographic test needs enough evidence to guide spend, not a map of individual members.
Set expand, hold, and stop rules
Expand a zone only when incremental paid members remain within the conservative ceiling, the team can serve them, and quality does not collapse.
Hold when volume is too small, tracking is incomplete, or one period may be distorted by season, offer, or operational changes.
Stop or narrow when out-of-area waste is material, attended visits remain weak, paid-member CAC breaches the ceiling, retention signals deteriorate, or the service promise is impractical for the journey.
Recheck after transport changes, a new competitor, branch opening, schedule change, price change, or meaningful shift in member origin.
Frequently asked questions
What radius should a gym use for ads?
There is no universal radius. Start with aggregated current-member and enquiry evidence, travel time, roads, transit, density, service type, price, and branch overlap. Test understandable zones against attended visits, paid members, contribution, and fully loaded CAC.
Is ad radius targeting exact?
No. Advertising platforms use multiple location signals and describe location targeting as best effort rather than perfectly accurate. Compare platform reports with lead-stated location and real attendance, and monitor out-of-area delivery.
Should a specialist gym target a larger area?
Possibly, when the service is genuinely distinctive and prospects will travel farther, but a larger area is not automatically profitable. Test separate zones, capacity, travel behaviour, paid-member CAC, collection, and retention before expanding.
