The IRENA™ Premium Curve Manual Treadmill redefines cardio training by merging pure human-powered performance with exceptional craftsmanship and architectural elegance. Designed for those who demand absolute control, IRENA™ operates without electricity, allowing the user to dictate speed, intensity, and rhythm in real time creating a deeply intuitive and biomechanically natural running experience. Its curved running surface promotes optimal posture, efficient stride mechanics, and reduced joint impact, making it ideal for endurance, HIIT, and longevity-focused training. Handcrafted from solid natural wood, stainless steel, and refined metal finishes, IRENA™ is as much a sculptural design statement as it is a high-performance training tool. Silent, sustainable, and visually striking, it integrates seamlessly into luxury residences, five-star hotels, elite fitness studios, and high-end wellness spaces, transforming cardio into an experience that is powerful, precise, and timeless.