King of Strength (KOS) Boxing Gym is a results-driven boxing and fitness gym in Singapore focused on building strength, confidence, and resilience. Offering group classes, personal training, and programs for all levels, KOS pairs professional coaching with a community that genuinely shows up for each other. Coaches learn your name, track your progress, and push you past the limits you set for yourself, all grounded in real technique and honest hard work. With two locations in Sembawang and Jurong, KOS welcomes everyone from complete beginners to competitive fighters. Whether your goal is weight loss, stress relief, or stepping into the ring, KOS has the coaching and community to get you there. Boxing is not just a sport here. It's a lifestyle.