More strength for a stronger heart
Why targeted training improves your heart health
Have you ever wondered how you can train your heart specifically – without hours of endurance training? Your heart is the only muscle that never rests. And like every muscle, it needs specific stimulation to stay strong. Especially as we get older. High-intensity interval training using the 4x4 method specifically strengthens your heart muscles. In just 35 minutes per week, you can improve your heart's pumping capacity, boost your oxygen uptake and gain more endurance for an active, self-determined life.
Our interval training goes to the heart
High-intensity cardiovascular training

Training for a healthy and strong heart muscle
A strong heart for a strong life
Strengthen your heart muscle without overloading it. With high-intensity cardiovascular training at Kieser, you sustainably improve your heart performance and oxygen uptake. A clearly structured approach for more energy, resilience and a healthy heart.

Arrange a free trial session
Try Kieser cardiovascular training with no obligation. Sign up now for a free trial session.
Your start to training
The first step
Would you like to begin a strong life? Then schedule a free introductory session at a studio of your choice.
Training shoes, comfortable workout clothes and a towel – that's all you need to get started. Whether you're a beginner or already have experience: we will guide you individually, ensure effective training, and help you achieve your personal goals. Learn more here about how to get started.

Cardiovascular training: The concept for a strong and healthy heart
Experience a highly effective interval training program that directly supports your heart health. The 4x4 HIIT consists of four high-intensity intervals of four minutes each, followed by four minutes of recovery. This method enhances your heart fitness – efficiently and effectively.
Efficient cardiovascular training
Improved cardiovascular performance
Increased oxygen uptake (VO₂max)
Improved blood circulation and heart function
Supports sugar and fat metabolism
Effective, scientific and sustainable
The formula: 1 x 35 minutes per week
A strong heart in just 35 minutes per week: with the proven 4x4 HIIT method, you can increase your performance and strengthen your heart health – in a time-saving and evidence-based way. Targeted cardiovascular training helps you reduce the risk of cardiovascular disease, improve your heart's pumping capacity and maintain your vitality in the long term.

Safe and effective
Individual cardiovascular training
Stay active and boost your heart health with a training programme tailored to your individual needs. Our experienced instructors will provide you with personal support and create a plan that takes your needs and goals into account.
Through a targeted combination of strength and cardiovascular training, you will increase your endurance, reduce your health risks and strengthen your heart – safely, effectively and sustainably.

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