Yoga is sometimes referred to as the science of religion with the view that the human body is a vehicle for the spirit and soul. It offers a number of tools with which to tune and rebalance the „vehicle‟, so that it is able to attract the appropriate level and quantity of prana, and fulfill the human function. The objective of the study is to find out the effect of Yogic practices on selected physical fitness and physiological parameters i.e. speed, endurance, and vital capacity and Resting Heart Rate among High School Boys & Girls at Secondary Educational School. Materials & Methods: The samples were collected from the 100 (50 Boys & 50 Girls) High school boys & girls in Secondary Educational School Hyderabad in the age group of 12- 16 years from Hyderabad district. Tools Used: Physical Fitness & Physiological Parameters are Speed, Endurance and Vital capacity and Resting Heart Rate was measured respectively. During the training period the subjects will undergo their respective training programme i.e. yogic exercises of 45 minutes a day for 6 days a week for 12 weeks. Yogic Exercises: Padmasana – Siddhasana – Pachimottanasana – Bhujangasana – Dhanurasana – Kurmasana - Pranayama exercises. Results & Discussions: The mean value of boys speed pre-test is 10.600 and post-test mean value is 8.879. The mean value of boy’s endurance pre-test is 5020.24 and post-test mean value is 6065.84. The mean value of boy’s Vital capacity pre-test is 2.354 and post-test mean value is 3.714. The mean value of boys resting heart rate pre-test is 106.34 and post-test mean value is 74.62.The mean value of girls speed pre-test is 10.481 and post-test mean value is 8.8592. The mean value of girl’s endurance pre-test is 4896.72 and post-test mean value is 6035.88. The mean value of girl’s vital capacity pre-test is 1.501 and post-test mean value is 2.676. The mean value of girls Resting Heart Rate pre-test is 119.68 and SD value is 6.535 and post-test mean value is 81.28 and SD value is 5.785. Hence, it is finally concluded that the Effect of Yogic Exercises on physical fitness and physiological variables have shown a positive impact among Pre-Test and Post-Test High school boys girls in Secondary Educational School Hyderabad district in relation to their physical fitness & Physiological parameters i.e. speed, endurance, and vital capacity and resting heart rate.