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High-intensity interval training (HIIT) has numerous external load control variables. The management of these variables makes the physiological responses and performance presented by athletes also modify. The present study aimed to assess the activity of CK and LDH enzymes, performance and metabolic responses caused by two HIIT protocols above the maximum in male recreational runners. Fifteen recreational male runners performed two HIIT protocols in randomized order with multiple conditions: 1) H15 ( n = 15), with a HIIT protocol of 15:15 work-recovery duration, and 2) H30 ( n = 15) with a HIIT protocol of 30:30 work-recovery duration. Both protocols were performed at similar intensity (130% vV̇O 2 max ), one set until voluntary exhaustion. Blood samples were collected and used to capture the levels and activities of blood lactate (BLac: mmol⋅L –1 ), glucose (GLU: mg⋅dL –1 ), creatine kinase (CK: U⋅L –1 ), and lactate dehydrogenase (LDH: U⋅L –1 ). BLac and GLU were collected at pre, five, and ten minutes after the H15 and H30 protocols were performed. Blood samples were used to measure the activities of CK and LDH enzymes, which were verified 24 h before and 48 h after the protocols. The distance traveled (m), total time (s), and bouts performed (rep) were also registered. Significant differences between conditions H15 and H30 were observed in the bouts performed ( p = 0.001; ES = 1.19). Several statistical differences were found over time for BLac [pre vs. post 5 (both conditions: p = 0.001), pre vs. post 10 (both conditions: p = 0.001), and post 5 vs. post 10 (H30: p = 0.004)], CK [pre vs. post 24 (H15: p < 0.001; ES = 0.97 and H30: p = 0.001; ES = 0.74) post 24 vs. post 48 (H30: p = 0.03; ES = 0.56)], and LDH [pre vs. post24 (H15: p = 0.008; ES = 1.07 and H30: p = 0.022; ES = 0.85). No statistical differences between conditions were observed for any blood parameter. Thus, the volunteers exhibited equal performance in both protocols, which resulted in a similar physiological response. Despite this similarity, in comparison to H15, the H30 protocol presented lower CK activity post 48 and lactate levels after 10 min post protocol.

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-Aging causes a reduction in the adaptive capacity of the organism. Therefore, there is a decrease in physical fitness, making it difficult to perform basic movements and the development of muscular power. Thus, to minimize this reduction, functional and traditional training can both be used; however there is no clarity about which is most effective. The aim of this study was to identify the influence of functional and traditional training on muscle power, quality of movement and quality of life in the elderly. Fortyfour older women were randomly divided into functional group (FG n=18), traditional group (TG n=15) and control group (CG n=11). Thirty-six sessions lasting 50 minutes were performed. Quality of life (WHOQOL-bref ), quality of movement (FMS) and muscular power were evaluated. FG and TG increased significantly in relation to control group and to the initial FMS values. In FG and TG, muscle power significantly improved compared to pre-test, but not in relation to the control group. Regarding quality of life, only FG presented significant improvement. Both applied methods demonstrate the ability to improve the quality of movement and muscle power. However, functional training achieved better results in quality of life and movement.