The ProPulse Speed Trainer unleashes your ability to run, move and respond faster, power, and more efficiently, regardless of sport, age or activity. It works by combining three key elements: Audible feedback (rhythm + timing); Dynamic feedback (weight shift + sensory feedback); Unique training (Double Down Pulse Technique). Not only does the ProPulse Speed Trainer put the weight in your hands, but the internal weight changes and audible feedback, you can increase speed, pace, and output, and train your entire body and get more results from workouts, running, and fighting training. The ProPulse Speed Trainer patented design combines both audible feedback (sound) and dynamic feedback (weight transfer). This combination improves speed, timing, and resistance and integrates your entire body when performing basic exercises and advanced exercises. The ProPulse Speed Trainer provides dynamic return (speed, power, integration, conditioning) and sound (timing, rhythm, balance, and adjustment). 《Strengthen core abdominal workouts》 Focus your mind and body on powerful workout sessions with the scientifically designed hand weight= speed trainer. Enhanced Body Coordination: The ProPulse Speed Trainer uses a unique blend of hearing and tactile responses to set timing and rhythm. Ergonomically designed for maximum comfort, allowing you to perform rigorous muscle conditioning with ease. Enhanced Training and Achieve Stronger and Harder Muscle: Portable hand weights small enough to fit in your pocket, but large enough to enhance any workout. Build your abdominal core whenever you want. > Seamlessly from basic exercises to advanced techniques while toning the core abdominal muscles.