Biomechanics is the leading sports science concerned with movement technique. This is particularly significant in gymnastics, where the performance styles of the top gymnasts serve as examples for others to emulate, we aimed to conduct this study to evaluate the biomechanical fundamentals of hand standing and somersaulting between the two groups with and without coach interferences. A comparative study was conducted in which 24 highly competitive national standard healthy male gymnasts were enrolled. The participants were divided into two equal groups each group consisting of 12 players. One group was interfered and additionally trained by a coach and another group served as control in which there was no additional interference of coach. The researchers filmed the performance via canon EOS 100D cameras, while the motion analysis was done using the Kinovea motion analysis program. For hand standing, balance time and postural execution was observed between two groups. For somersault, c-motion guidelines were used to attach markers to the joints and limbs of participants to observe the angle and angular velocity of joints. A total of 24 participants (12 in each group) were analyised . Results was found out that the angles of ankle, knee, hip and shoulder at toe off time was found statistically significant. The angular velocity at the time of initial contact and toe off between the two groups was statistically significant. The hand standing between two groups was found son significant. The study results revealed that the angles of participant under coach interferences were found effective in somersault. In light of the results, it is recommended that joint angles should be focused to acquire this technique more effectively. Keywords: somersaults, hand standing, biomechanical fundamentals, coaching interference, gymnastic. https://doi.org/10.47197/retos.v51.99859