Most of the injuries in the military parachuting course (MPC) occur during the landing phase because of intrinsic or extrinsic variables. It is important to assess the lower limbs neuromuscular (NM) impact of the MPC to understand the muscular adaptations and the eccentric work, because via the reflex activated by the eccentric phase, it can strengthen the elastic characteristics of the muscle-tendon complex (MTC). Besides, the evaluation of the ground reaction forces (GRF) allow to evaluate muscles function in eccentric-concentric conditions, elastic and reflex components of the MTC through jumping tests that report NM changes due to a training. PURPOSE: Assess the lower limbs neuromuscular impact of the MPC in Colombian militaries. METHODS: A prospective study was performed in 43 male cadets from the military school who went to the MPC (4 weeks). Each cadet performed 5 drop jump (DJ) test before and after the course, and landed in uniaxial force platforms. For the statistical analysis a paired t-student was performed to determine the changes in the variables that described the DJ, due to the MPC. RESULTS: Positive changes were found in the reduction of contact time (0.43+0.1 vs 0.38+0.1 s, p<0.01) and the increase of the eccentric mean force (1513.5+281.4 vs. 1642.9+289.1 N, p<0.01). However, negative changes were observed in the reduction of the jump height (27.7+3.9 vs. 24+3.6 cm, p<0.01), concentric impulse (165.7+26 vs. 153.1+23.7 Ns, p<0.01) and vertical velocity at takeoff (2.34+0.18 vs. 2.17+0.16 m/s, p<0.01) and an increase in the peak landing force (3836.4+825.1 vs. 4461.5+1032.2 N, p<0.01). CONCLUSION: There is an improvement in the myotatic reflex related to the adaptations of the lower limb extensor in response to the eccentric force. However, the variables that defined the power and the GRF shown a negative effect over NM characteristics of LL performance, increasing their risk of injury because of high impacts that are not transfer properly to other soft tissues.