Weights
Strength training that goes beyond the barbell. Our functional weights, including the weighted vest, fitness sandbags and unstable loads, challenge your stabilising muscles and coordination for real-world strength you can use anywhere. German-engineered and built to last.
Weight Accessories
Functional Weight Training - every movement is a new challenge
Functional weight training builds strength you can actually use. Instead of isolating one muscle on a fixed machine, you move real, often shifting loads that force your whole body to stabilise, coordinate and work as a unit. This collection brings together three tools that make that happen: the ergonomic aerobis Rucksack for rucking, the adjustable aerobis Kettlebell that covers 1 to 25 kg in a single unit, and the aerobis Sandbag with up to 30 kg of shifting load. Whether you train at home, in the gym or outdoors, you build real-world strength, better coordination and endless exercise variety from one compact set of equipment.
Why Rucking?
Rucking means walking with a weighted backpack - one of the simplest and most effective ways to build fitness and overall health. It’s a low-impact activity that:
- Builds strength and endurance: challenges your muscles, cardiovascular system and mental toughness.
- Burns more calories: a loaded backpack clearly raises the energy cost compared to regular walking.
- Improves posture: encourages an upright position and strengthens your core.
- Reduces stress: a mindful way to connect with your body and the outdoors.
Why choose the aerobis Rucksack?
- Ergonomic design: distributes the load evenly to minimise strain and maximise comfort.
- Durable construction: reinforced stitching and high-quality materials, built for loaded movement.
- Versatile: ideal for rucking, hiking, travel and everyday use.
- Adjustable: find the perfect fit with adjustable straps and hip belt.
With the aerobis Rucksack you integrate fitness seamlessly into your daily life and experience the benefits of rucking.
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Why Kettlebell Training?
Kettlebell training is a highly effective way to improve strength, endurance and overall fitness. It’s a full-body workout that engages multiple muscle groups at once, helping you burn calories, build muscle and improve your cardiovascular health.
The adjustable aerobis Kettlebell changes its weight from 1 to 25 kg in seconds, making it perfect for beginners and experienced athletes alike - anytime, anywhere.
Why choose the aerobis Kettlebell?
- Adjustable weight: set the load from 1 to 25 kg to match your level and the exercise.
- Space-saving design: one aerobis Kettlebell replaces a whole rack of fixed weights.
- Durable and high-quality: made from robust PVC and designed to last.
- Versatile: from swings and squats to snatches and Turkish get-ups.
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Why choose the aerobis Sandbag?
Experience a new dimension of strength training with the aerobis Sandbag: up to 30 kg of shifting load that builds strength, power and coordination like no rigid weight can.
- Unstable load training: the shifting filling maximises muscle activation and core engagement.
- Functional strength: real-world strength that transfers to sports and everyday activities.
- Versatile design: multiple handles, adjustable weight and the option to fill it with water.
- Durable and high-quality: built for intense workouts, indoors and outdoors.
Train smarter, not just harder
The instability forces your muscles to work harder to stabilise and control the weight on every rep - for greater strength gains and better coordination.
Endless exercise variety
Use the Sandbag for squats, lunges, throws and carries, or connect it to your aeroSling sling trainer for an extra challenge.
Water-filled intensity
Fill the Sandbag with water to create an aquabag: the constantly shifting water demands maximum core stability and control.
New to the sandbag? Our free sandbag workouts and exercise videos show you step by step how to build functional strength.
FAQ - frequently asked questions
What is unstable load training and what are its benefits?
With tools like the aerobis Sandbag, the load shifts with every movement. Your stabilising muscles and core have to counteract this constantly, so every rep trains strength, balance and coordination at the same time. The result is real-world strength that transfers to sport and everyday life, and you stay in control because you decide the load and the tempo.
How heavy should my fitness sandbag be?
Start conservatively: because the filling shifts, a sandbag feels harder to control than a rigid weight of the same load. For most beginners 10 to 15 kg is enough for full-body exercises like squats, lunges and carries. Advanced athletes can fill the aerobis Sandbag with up to 30 kg or use water instead of sand for an even bigger stability challenge.
How much weight should I use for rucking?
A good rule of thumb is to start with around 10 % of your body weight and walk at a brisk pace. Increase the load gradually over several weeks up to around 20 % as your posture and endurance improve. The ergonomic aerobis Rucksack distributes the weight evenly, so you stay comfortable even on longer rucks.
What are the advantages of an adjustable kettlebell?
One adjustable kettlebell replaces a whole rack: the aerobis Kettlebell adjusts from 1 to 25 kg in seconds, so you always train with the right load for every exercise - lighter for snatches and Turkish get-ups, heavier for swings and squats. That saves space and money, which makes it ideal for home gyms and small studios.
What weight kettlebell should I start with?
As a rough guide, many beginners start around 8 kg for women and 12 kg for men on two-handed moves like swings and goblet squats, and go lighter for overhead exercises such as snatches or Turkish get-ups. Instead of buying several fixed weights, the adjustable aerobis Kettlebell covers 1 to 25 kg in a single unit, so you can set the right load for every exercise and keep adding weight as you get stronger.
What muscles does rucking work?
Rucking is a true full-body activity. The added load mainly works your legs and glutes as you walk, while your core, lower back and shoulders stay engaged to keep you upright and stabilise the pack. Because it also lifts your heart rate, you build strength and cardiovascular endurance at the same time. The ergonomic aerobis Rucksack spreads the weight evenly, so it stays comfortable even on longer walks.
What are kettlebells good for?
Kettlebells are one of the most versatile training tools you can own. Their offset handle and shifting centre of gravity make them ideal for dynamic, full-body movements like swings, cleans and snatches that build strength, power and cardiovascular fitness at the same time. They also train grip, core stability and coordination, which carry over to sport and everyday life. And because one adjustable kettlebell covers a wide weight range, it is a space-saving choice for training at home.
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