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The Impact Of Military Operations In The Brazilian Amazon Jungle In Muscular Strength Parameters: 941 Board #257 June 1, 2: 00 PM - 3: 30 PM.

The muscular strength is one of the physical fitness ́s components for the maintenance of the physical performance that can be altered during tiring activities and physical exercises. The Jungle Warfare Instruction Center – Centro de Instrução de Guerra na Selva (CIGS) is the military unit responsible for the qualification of jungle warriors, fighters prepared to carry out missions in the most barren of the Brazilian amazon jungle. During the course of jungle warfare, the military undergo intense and continuous physical demands which can decrease the physical performance of the warrior, such as load carrying through the jungle and the transposition of water courses in the amazon environment. PURPOSE: To verify the change of muscular strength after 11 (eleven) weeks of continuous operations in the jungle. METHODS: 60 military male aged 28 ± 4 yrs took part in this study. The sample was similar anthropometrical characteristics (total body mass 75±8 Kg, Height 173±6 Cm, % Fat 14,2±4). Load cells were used (EMG system do Brasil), to measure the parameters of muscular strength of the scapular (SCP), lumbar (LMB), lower limbs (LL) and hand grip (HG). The muscular strength tests were performed before (T1) and after (T2) the eleven weeks of military operations in a jungle environment. The values were assessed in terms of average and standard deviation and was used the t paired test (Statistica 7.0). RESULTS: The strength tests SCP [T1 (37,2 ± 7,9) and T2 (33,3 ± 6,7)], LMB [T1 (146,4 ± 29,1) and T2 (68,7 ± 14,4)] and LL [T1 (155,5 ± 30,7) and T2 (75,6 ± 13,9)] showed a significant difference (p<0,05). The strength test HG [T1 (33,9 ± 4,3) and T2 (33,8 ± 5,4)] did not show a significant difference. CONCLUSION: This study suggest that the continuous and intense physical demands applied during the eleven weeks of military operations in the Brazilian Amazon Jungle signaled a decrease in muscular strength when compared to the scientific literature, mainly in lumbar area and lower limbs.