Uncontrolled muscle contractions are a common phenomenon in endurance and team sports, often leading to withdrawal and performance interruptions. Typical causes include mechanical overload, cold temperatures, dehydration, as well as energy and electrolyte losses. The long-standing practice of consuming mixed pickle juice is supported by scientific studies. Sponser Muscle Relax is a scientifically formulated and optimized solution inspired by mixed pickle juice, containing acetic acid, the bitter compound quinine, and magnesium. Magnesium contributes to electrolyte balance and normal muscle function.