Percorrer por autor "Santos, Paulo"
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- Comparison of a continuous and intermittent triangular protocols for direct VO2max assessementPublication . Cardoso, Carla; Fernandes, Ricardo J.; Magalhães, Juan; Santos, Paulo; Colaço, Paulo; Soares, Susana; Carmo, Carla; Barbosa, Tiago M.; Vilas-Boas, João PauloThe purpose of this study was to compare two incremental protocols for V02max assessment and minimum swimming velocity that elicits V02max (vV02max). The sample comprised 11 Portuguese swimmers: 6 females (2 1.00± 1. 79 years, 54.83±3.71 kg, and 163.83±1.47 cm) and 5 males (25.40±2.79 years, 69.00±9.03 kg, and 175.00±9.03 cm). They performed two incremental protocols (starting at 0.9 m.s'\ with increments of 0.05 m.s,l per 200-m stage) for freestyle V02max assessment, with a 48h interval and in the same general conditions. One protocol was a continuous test and the other an intermittent one, with 30-s rest between incremental stages for [La-] assessment. Mean values of V02max, vV02max, VE, R, HR and [La-] for continuous and intermittent protocol, were respectively 52.5±9.44 m1.kg'l.min'l and 53.4±8.74 rnl.kg'l.min'l, 1.16±O.099 m.s) and 1.15±O.099 m.s-l, 95.3±26.32l.min,l and 95.8±26.60 l.min'l, 1.00±0.044 and 1.00±0.053, 183.l±9.47b.min'l and 187.5±8.44 b.min'l, 7.36±Ll313mM.rl and 8.86± 1.93hnM.r1. [La-] was the only different parameter between both protocols (p 0.05). Resnlts pointed out that both protocols were suitable for V02max and vV02max assessment in swimming.
- Energy cost and intra-cyclic variation of the velocity of the centre of mass in front crawl.Publication . Novais, Daniel; Carmo, Carla; Gonçalves, Pedro; Sousa, Filipa; Lima, António B.; Barbosa, Tiago M.; Santos, Paulo; Machado, Leandro; Keskinen, Kari L.; Fernandes, Ricardo J.; Vilas-Boas, João PauloThe purpose of the present study was to analyse the relationship between energy cost (C) and intra-cyclic speed fluctuations (dv) in breaststroke.
- Longitudinal study in 3,000 m male runners: relationship between performance and selected physiological parametersPublication . Bragada, José A.; Santos, Paulo; Maia, José A.R.; Colaço, Paulo; Lopes, Vitor P.; Barbosa, Tiago M.The purpose of the present study was to analyze longitudinal changes in 3,000 m running performance and the relationship with selected physiological parameters. Eighteen well-trained male middle-distance runners were measured six times (x3 per year) throughout two consecutive competitive seasons. The following parameters were measured on each occasion: maximal oxygen uptake (VO2max), running economy (RE), velocity at maximal oxygen uptake (vVO2max), velocity at 4mmol L-1 blood lactate concentration (V4), and performance velocity (km·h-1) in 3,000 m time trials. Values ranged from 19.59 to 20.16 km·h-1, running performance; 197 to 207 mL·kg-1·km-1. RE; 17.2 to 17.7 km·h-1, V4; 67.1 to 72.5 mL·kg-1·min-1, VO2max; and 19.8 to 20.2 km·h-1, vVO2max. A hierarchical linear model was used to quantify longitudinal relationships between running performance and selected physiological variables. Running performance decreased significantly over time, between each time point the decrease in running velocity was 0.06 km·h-1. The variables that significantly explained performance changes were V4 and vVO2max. Also, vVO2max and V4 were the measures most strongly correlated with performance and can be used to predict 3,000 m race velocity. The best prediction formula for 3,000 m running performance was: y = 0.646 + 0.626x + 0.416z (R2=0.85); where y = V3,000 m velocity (km·h-1), x = V4 (km·h-1) and z = vVO2max (km·h-1). The high predictive power of vVO2max and V4 suggest that both coaches and athletes should give attention to improving these two physiological variables, in order to improve running performance.