Endurism Spotlight: The Adjustable Dumbbell
Your gym bills every four weeks. Thirteen times a year the money leaves before you decide to go.
The money
A Basic-Fit Comfort pass costs €24,99 per four weeks. Over a year that is about €325. Premium runs €29,99, close to €390 a year. The Dutch average sits between €20 and €75 a month. Most of it goes whether you show up or not.
A set of adjustable cast-iron dumbbells costs €99,95. You pay once. The iron never asks for more.
The object
The set is two short bars and a stack of plates. You thread on 1, 2,5 or 5 kilo discs and lock them with collars. One pair covers every load from one kilo to ten. Cast iron does not wear out or rust through. A plate dropped on a concrete floor in 1975 still weighs what it did then. Nothing in it can break in a way a spanner cannot fix.
The math
Price the two side by side over ten years.
| One-time cost | Cost over 10 years | |
|---|---|---|
| Adjustable dumbbells (2×10 kg) | €99,95 | €99,95 |
| Gym membership (Basic-Fit Premium) | €0 | ≈€3.900 |
The membership costs roughly forty times the iron across a decade. It rises each time the chain raises the price. The dumbbells repay themselves in about three months of fees. After that the strength work is free for life. A heavier set, two times twenty kilo, still lands in the low hundreds.
Ownership
Iron is one of the few things you own that barely depreciates. It trades near €1,50 a kilo and holds that floor. A used set moves on Marktplaats in a day, for most of what you paid. The membership leaves you nothing the month you cancel. The dumbbells sit in the corner as a small asset you can always sell. A gym still earns its fee for cardio machines and classes you cannot keep at home. The quiet monthly charge for strength work you could do at home is the one worth cutting.
Verdict: €99,95 of iron does at home what €3.900 of membership does in ten years. Own the weight.