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 16 gyms in Jämsä. This is the number of places in this service, not an official total for the municipality.
11 places have parking within 500 metres (typically 100 m) and 14 places have a bus stop nearby (typically 125 m). Distances are measured to the nearest parking area and bus stop marked on the map.
Kuntokeskus Karboni is right in the city centre. The farthest is about 27 km away.
Ole.Fit Himos, Kuntokeskus Karboni, Kuntosali Keskikeho Gym, Kuoreveden koulun kuntosali. 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. 13 places in Jämsä have a link to their own website and 6 have a phone number. The most up-to-date information is always on the place's own site.