Privacy & cookies
Sterck and your data
Sterck Boutique Gym, Boumaboulevard 384, 9723 ZT Groningen (Chamber of Commerce no. 61799920) is your point of contact for any data you share with Sterck. For privacy questions: info@sterckgym.nl.
Cookie choices
Your choice is stored in your browser for up to 180 days. This is necessary to remember your preference. While you browse, the site remembers where you came from until you close the tab. Statistics and marketing are off by default. You can reject everything or give consent per category, and withdraw it later. We do not ask for consent to book an appointment.
Statistics and marketing
With consent for statistics, the site uses Google Analytics 4 for page views, clicks and appointments made. A booked appointment is measured as a lead; a WhatsApp click is not proof that a message was sent. With marketing consent, Google Ads measures which ad led to an appointment. Google may set cookies such as _ga and _gcl_aw. We do not include names or phone numbers in these events. Only when you sign up as a member, and only with marketing consent, Google Ads receives a hashed (made unreadable) version of your email address to measure which ad worked (enhanced conversions). When you sign up, we keep the Google click ID (gclid) for at most 90 days.
Booking an appointment
For an appointment, Sterck stores what you enter yourself: your name, email address, phone number, your answers to the questions (goal, experience, the service you want and an optional note), the date and time you chose and the language of the site. We use this to schedule your appointment, send you a confirmation and a reminder, reach you (also via WhatsApp) and prepare the conversation. This is necessary for the appointment you ask for. We also keep where your visit came from (for example a Google ad or Instagram), so Sterck knows how you found the site; we do that on the basis of legitimate interest. We use your IP address only briefly, to prevent abuse and too many requests; it is not stored with your appointment.
Emails about your appointment
You receive a confirmation, a reminder about a day before the appointment and a message if the appointment is moved or cancelled. About a month after your introduction we send you a single email asking how you are finding Sterck and whether you would write a Google review; we do that on the basis of legitimate interest. If you would rather not receive it, just let us know. These emails contain a personal link that lets you move or cancel the appointment yourself; do not share it. Sterck also receives an email for a new, moved or cancelled appointment. The emails are sent through Resend, our processor, from the European Union (Ireland). Resend keeps sent emails, including the personal link, in its log for its own retention period.
Where your data is stored
The website and the appointments database run at Cloudflare (hosting and the D1 database), our processor. When you book, Cloudflare Turnstile checks that you are a human. In doing so, Cloudflare processes your IP address and browser data. This is needed to prevent abuse (legitimate interest), so we do not ask for consent for it.
Sterck's calendar
Appointments appear in the owner's calendar through a private calendar subscription. It contains your name, contact details and answers. The owner uses this subscription in her own calendar app, which may sync through the provider of her device or account, for example Apple iCloud. That provider then processes the calendar on her behalf.
Retention
We keep the details of an appointment for up to 12 months after the appointment, then they are deleted automatically. A cancelled appointment is deleted automatically 30 days after it was cancelled. Deleted data can still be restored from Cloudflare's database backup for up to 30 more days. You can ask for earlier deletion.
Signing up
Signing up directly opens Virtuagym, where that service's privacy terms apply.
The contact button opens WhatsApp; it does not send a message automatically. If you send a message yourself, Sterck receives your WhatsApp number and message. Replies arrive in your WhatsApp, also after you close this website. WhatsApp processes data according to its own privacy policy.
Cameras in the gym
The gym has cameras at the entrance and in the training area, not in the changing rooms and not at the physiotherapist. We use the footage for safety, to check misuse of access and in case of incidents (legitimate interest). We keep it for at most 4 weeks, unless there is an incident.
Your rights
You can ask to access, correct or delete your data and, where applicable, to restrict it, transfer it or object to its use. You can always withdraw your consent. To do so, contact info@sterckgym.nl. You can also file a complaint with the Dutch Data Protection Authority (Autoriteit Persoonsgegevens).
External services
External services may process data outside the European Economic Area. Their own privacy information describes the terms, retention periods and safeguards: Google, Resend, Cloudflare and WhatsApp.