- Compact and Portable Design : Measuring just 10 x 5 cm, this muscle trainer easily fits into your daily routine. Whether at home, in the gym, or on the go, it allows you to enhance muscle strength and flexibility anytime, anywhere. - Adjustable Resistance Levels : Tailor your training with an adjustable rotary valve. Effortlessly increase or decrease resistance by turning the knob, enabling a customized workout experience for optimal results. - Versatile Training Tool : Perfect for a variety of sports, including athletics, running, swimming, gymnastics, and martial arts. This trainer not only supports your fitness goals but also boosts your performance and endurance across multiple disciplines. - High-Quality Silicone Material : Constructed from ultra-flexible, food-grade silicone, this muscle trainer guarantees safety and durability. It is also designed for easy cleaning and maintenance, ensuring long-lasting use. - Safe and Effective Muscle Training : Each unit is individually packaged for hygiene and safety, making it suitable for users of all levels. Achieve your fitness targets with confidence using this reliable breathing trainer. Use Scenarios : 1. Incorporate it into your pre-workout warm-up routine to enhance flexibility and prevent injuries. 2. Use at home while watching TV or during breaks at work to maintain muscle strength and endurance. 3. Combine with specific sports training sessions for tailored muscle conditioning to improve overall athletic performance.