The aim of this study was to explore the Alliance between upper and lower body muscular strength as well as cardio- respiratory endurance among school going children Punjab, Pakistan 12 to 16 years of age. A sample of 1840 boys was drawn from the targeted population. Children were tested on Standing Broad Jump to measure the strength of lower body muscles, Used on handgrip to measure the strength of upper body muscles, Beep Test for cardio-respiratory endurance and height and weight to determine Body Mass Index (BMI). Multiple regression analysis depicted association of lower body muscular strength Standing broad jump with upper body muscular strength handgrip and cardio- respiratory endurance Beep Test (R 2= 0.010 and 0.11 respectively). The analysis reflected the significant Alliance, though weak, between lower body strength standing broad jump and upper body strength handgrip and cardio respiratory endurance Beep Test. Hence lower body muscular strength can be considered useful indicator for muscular strength and cardio-respiratory endurance among school going children Punjab, Pakistan.