Endurance is not just about cardio. In calisthenics, it's doing 50 push-ups or holding a plank for minutes. It trains your slow-twitch fibers, improves blood flow, and enhances recovery between sets. Build it with high-rep work, timed sets, and circuit training. For strength athletes, endurance is a foundation. For skill work, it supports longer practice sessions. Don't neglect it—it's the bedrock of work capacity.