Gyms on the map: over 3100 fitness centres in Finland, from chains to municipal halls, by municipality. Free, no login and no paywall.
3 122 places in
The map shows 5 gyms in Masku. This is the number of places in this service, not an official total for the municipality.
3 places have parking within 500 metres (typically 90 m) and all places have a bus stop nearby (typically 70 m). Distances are measured to the nearest parking area and bus stop marked on the map.
Hemmingin liikuntahalli is right in the city centre. The farthest is about 12 km away.
Lemun kuntosali, Masku Gym. These have their own description, a photo or a Wikipedia article, so the place page offers background beyond the location alone.
On the place's own page. 5 places in Masku have a link to their own website and 2 have a phone number. The most up-to-date information is always on the place's own site.