Endurance refers to the ability to sustain physical or mental effort over a prolonged period of time. It involves withstanding discomfort, exhaustion, or challenges to reach a goal or overcome obstacles. Endurance can be developed through training and consistent practice. In regard to physical fitness, it is crucial for activities like running marathons, participating in long-distance events, or engaging in high-intensity exercises. In a broader sense, endurance can also apply to mental, emotional, or spiritual aspects of life, where resilience, perseverance, and determination are necessary to maintain focus, overcome adversity, and achieve success in various endeavors.