Image, Stock Photo Brown-haired boy with an athletic build promotes the jump rope as one of the best tools for improving endurance, jumping power

Brown-haired boy with an athletic build promotes the jump rope as one of the best tools for improving endurance jumping power jump athletic sport person rope sportsman practice exercising pulling physical run gymnastics workout fitness training outside european brown hair slim sportswear strength sportive plyometric training boxer determination muscular male guy jogging plyometrics tough motivation mature energy vitality healthy lifestyle competition routine action session coach bodybuilding endurance coordination muscle model teenager adolescent effort health