The study was intended to examine the relationship of physical activity levels with selected physical parameters viz. power, speed, legs explosive power, handgrip strength, upper body strength, abdominal strength and flexibility among the school children of age 11-12 years. A sample of 60 male children was selected using purposive sampling technique. Data was collected by administering physical fitness tests and a self-reported questionnaire was used to assess physical activity levels. Data was analyzed by employing bivariate correlation, putting alpha level at 0.05. It was found that physical activity levels has significant relationship with power, speed, leg’s explosive strength, endurance, upper body strength and abdominal strength (p< 0.05).