Summary: Why does 10 kg with BOLDR feel different than 10 kg with a dumbbell? We geek out on the physics behind electromagnetic resistance and explain why linear loading is superior for muscle contact and injury prevention.
DUMBBELLS VS. ELECTROMAGNETIC FORCE
When you train with dumbbells, you are a slave to gravity. Gravity always pulls the weight straight down, which means the resistance changes dramatically depending on your arm angle. Take a lateral raise for your shoulders as an example: at the bottom of the movement, the resistance is almost zero, while at the top, a massive amount of torque is created on the joint. This "load curve" means the muscle isn't working as efficiently throughout the entire range of motion, and it also creates dangerous peak loads that can lead to injury.
BOLDR works in a completely different way. Our specialized electromagnetic motor delivers linear resistance. This means that regardless of the angle you pull from, the resistance is exactly what you set – from start to finish. This provides a constant tension (Time Under Tension) that is very difficult to achieve with free weights. You can easily adjust the weight between 3 and 30 kg, either via the buttons on the device itself or directly in our app. For those of us who take our training seriously, this consistency is the secret to faster results and safer lifting.
PRECISION IN EVERY MOVEMENT
We chose this hardware because it represents the future of training. By digitizing resistance, we can offer a level of precision that traditional gym equipment lacks. When you combine this smooth power with our self-developed software, you also get data on every repetition, speed, and power output. This is information that dumbbells can never deliver, yet it is crucial for optimizing your progression.
We are proud to be a Swedish company that not only handpicks the best technology but also develops the app that makes it useful. We have our roots in Malmö and ship everything from our own warehouse with a 2-year warranty. We believe in transparency: we didn't design the motor itself, but we built the entire ecosystem that allows you to train with gym-quality resistance wherever you are. Want to dive deeper into how we prevent injuries with this technology? Read our post on RSI and rehab here.