Baarsjesweg 289hs, 1058AG, Amsterdam
Along the Baarsjesweg in the West-Indian neighbourhood you will find Core Active. This gym has been around for over 30 years (until 2017 under the name Brightside Fitness), and has a good reputation as a friendly and functional gym. It has a great fitness with a spacious room for group lessons and a nice sauna. They also have physiotherapy, dieticians and personal training at home. Make reservations online or simply step inside.
Make sure you arrive 5 minutes before the lesson starts. There are lockers that work with a personal code along with showers and a sauna.
This is a reservation-only location or its opening hours are unknown. Check the location's website for more information.