Dumbbells are small, handheld weights used for strength training and fitness exercises. They come in various shapes, sizes, and materials, allowing people to choose the right ones for their workout needs. Using dumbbells can help build muscle, improve endurance, and enhance overall fitness. They are versatile and can be used for a wide range of exercises, targeting different muscle groups. Many people incorporate dumbbells into their workout routines at home or in the gym. They can be used by beginners and advanced athletes alike. Popular exercises include bicep curls, tricep extensions, and shoulder presses, making dumbbells a staple in any fitness program.