Talent identification and development programs need uniformly accepted theoretical framework to guide current practices.  These norms can be  used to grade the students based on physical fitness parameters.  The purpose of this study was to construct norms and grading of  maximum strength and explosive strength of both hands among pre-adolescents. A total 2641 boys were determined as a sample of the study through the stratified random sampling procedure, from 36 schools in Mailaduthurai and Sirkalli educational districts in Nagapattinam revenue District (presently Mailaduthurai District), Tamil Nadu, India. The age of the selected subjects ranges between 10-13 years. On the basis of their initial bio-motor abilities, the norms were developed for maximum strength and explosive strength of both hands by using descriptive statistics and percentiles. Based on the norms, the students were classified into various grads and these grades are ranging from excellent to very poor on the five point scale (excellent, good, average, poor & very poor). In right hand maximum strength Test 50 percent of student’s maximum strength below 4.50kg, 80 percent student’s maximum strength below 5.46kg. In case of left hand maximum strength Test 50 percent of student’s maximum strength below 3.44kg, 80 percent student’s maximum strength below 5.69kg. In case of right hand explosive strength Test 50 percent of student’s explosive strength below 34.26m, 80 percent student’s right hand explosive strength below 45.84m. In case of left hand explosive strength Test 50 percent of student’s explosive strength below 24.87m, 80 percent student’s left hand explosive strength below 33.48m.

Key Words: Maximum strength and Explosive strength, Pre-adolescents