Resistance band training differs from free weights mainly in terms of resistance and stability. Bands provide a variable resistance that increases as they stretch, allowing for continuous tension on the muscles throughout the range of motion. This can enhance muscle engagement and promote stability. In contrast, free weights often require more balance and stabilization, which can be beneficial for developing functional strength. Both training methods have their advantages, as resistance bands are portable and suitable for rehabilitation, while free weights generally allow for greater loads and strength gains.