매일 뛰는데도 스파링에서 무너지는 진짜 이유 #복싱체력 #스파링 #40대운동 #40대아재복서

There's a reason your arms stop coming up and you're gasping for air after just a few rounds on the mitts or a few minutes of sparring — even though you run every day. Boxing stamina isn't just jogging fitness. It's built from round-style intervals, shoulder muscular endurance, recovery, and breathing — all working together as separate pieces. In this video, I break down a realistic approach to building boxing stamina for everyday boxers, especially those in their 30s, 40s, and 50s. #BoxingStamina #BoxingTraining #Sparring #BoxingBeginner #FitnessIn40s #MiddleAgedBoxer #BoxingBreathing #WorkoutRoutine #MiddleAgedFitness