Lioninside®
Your space. Your gym. Your rules.
About us
Lioninside® is an innovative and premium Dutch fitness brand, based in Sliedrecht. We combine advanced technology with timeless design to create fitness equipment that is not only powerful and durable, but also aesthetic and space-saving.
Our mission
To deliver high-quality, innovative home fitness solutions, especially for athletes who choose quality, results, and efficiency.
Every product in our range, from our adjustable dumbbells to the latest kettlebell systems, is designed with attention to detail and manufactured in leading factories, carefully tested in the Netherlands.
What makes Lioninside® unique
- Premium materials — a finish you feel in the first second, not only after a year of use
- Compact, modular design that fits into any living room (no ugly rack needed)
- 3-year manufacturer’s warranty
- Tested by Men's Health and named "the best adjustable dumbbell we’ve ever used"
- Shipping and customer service from Sliedrecht — with us, you speak to a person, not a script
Lioninside® exists for people who are tired of home training always being a compromise: either expensive and ugly, or affordable and disposable.
We design equipment that combines the technology of a professional gym with a design that fits into a modern interior — without compromising on strength, precision, or durability.
Whether you're building a complete home gym or want to train smartly in a corner of your living room: with Lioninside® you make one solid investment.
Join 19,000+ satisfied customers
More intensive training
These adjustable dumbbells make me train more intensively. With classic dumbbells, I wouldn’t increase the weights by 1 or 2 kilos between sets. Now I can increase the weight by 1.5 kilos in the blink of an eye.
Excellent quality
Excellent quality dumbbells! They take up hardly any space and are easy to use thanks to the click system. No regrets about my purchase. I can recommend this company to everyone, top-notch!
Very satisfied with the adjustable dumbbells
The dumbbells were delivered the next day and were well packaged. All parts are made of steel (no plastic junk) and they feel good in the hand. Switching between the different weights is smooth.
Really pleasant to use
The dumbbells are really pleasant to use. Adjusting them is simple and quick. I also contacted Lion Inside with a question, and that contact was super positive too. Very happy with my purchase.
Good store and a great product
Ordered the 41.5 kg adjustable dumbbells and a little later also a stand. Even though they were two separate orders, everything was still delivered the next day. Emails are answered quickly, and they are also very helpful and friendly on the phone.
Top service and quality!
The delivery was lightning fast and customer service responds quickly and kindly to questions. The quality of the dumbbells is top-notch, sturdy and easily adjustable. Definitely recommended!
Fantastic equipment
Fantastic equipment. Very high quality and robust, customer service outstanding. I’m going to get a lot of enjoyment and a lot of muscle soreness out of this.
What an invention
I have the Lioninside black dumbbells up to 41.5 kilos. What an invention. They hardly rattle and are easy to adjust. Truly a top purchase!
Great dumbbell set
Great dumbbell set. Very happy with it. Training at home was always a bit of a hassle because of changing weights. Now I’m ready for the next set within a few seconds.
Never want anything else again
Since I got the adjustable dumbbells, I never want anything else again. The grip is excellent and changing the weight is easy. Great gear and a great company with good service.
Perfect dumbbells for home use
I’ve been training for 40 years now and all those years I had to change my dumbbell plates, but with these it’s one wrist movement and done, exactly at the right weight. What I like is that the dumbbell only gets 2 plates wider each time, so at 7 kilos it’s a small dumbbell.
I should have bought them right away
At first I had a cheap set of adjustable dumbbells from another brand. They were already rattling after a few weeks and changing the weight never went smoothly either. In the end I still bought the LION V5 and that difference is really unbelievable. Looking back, I should have bought these right away.
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Customer service
085 0606 291 or via klantenservice@lioninside.nl
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Track & Trace
Updates & tracking directly after ordering
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Returns
Easy returns within 14 days
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Express delivery
Delivered within 1 business day
085 0606 291 or via klantenservice@lioninside.nl
Updates & tracking directly after ordering
Easy returns within 14 days
Delivered within 1 business day