2 research outputs found
HYPERLACTEMIA INDUCTION MODES AFFECT THE LACTATE MINIMUM POWER AND PHYSIOLOGICAL RESPONSES IN CYCLING
No full textZagatto, AM, Padulo, J, Muller, PTG, Miyagi, WE, Malta, ES, and Papoti, M. Hyperlactemia induction modes affect the lactate minimum power and physiological responses in cycling. J Strength Cond Res 28(10): 2927-2934, 2014The aim of this study was to verify the influence of hyperlactemia and blood acidosis induction on lactate minimum intensity (LMI). Twenty recreationally trained males who were experienced in cycling (15 cyclists and 5 triathletes) participated in this study. The athletes underwent 3 lactate minimum tests on an electromagnetic cycle ergometer. The hyperlactemia induction methods used were graded exercise test (GXT), Wingate test (WAnT), and 2 consecutive Wingate tests (2 x WAnTs). The LMI at 2 x WAnTs (200.3 +/- 25.8 W) was statistically higher than the LMI at GXT (187.3 +/- 31.9 W) and WAnT (189.8 +/- 26.0 W), with similar findings for blood lactate, oxygen uptake, and pulmonary ventilation at LMI. The venous pH after 2 x WAnTs was lower (7.04 +/- 0.24) than in (p <= 0.05) the GXT (7.19 +/- 0.05) and WAnT (7.19 +/- 0.05), whereas the blood lactate response was higher. In addition, similar findings were observed for bicarbonate concentration [HCO3] (2 x WAnTs lower than WAnT; 15.3 +/- 2.6 mmol center dot L-1 and 18.2 +/- 2.7 mmol center dot L(-)1, respectively) (p <= 0.05). However, the maximal aerobic power and total time measured during the incremental phase also did not differ. Therefore, we can conclude that the induction mode significantly affects pH, blood lactate, and [HCO3] and consequently they alter the LMI and physiological parameters at LMI.Sao Paulo State Univ UNESP, Dept Phys Educ, Bauru, BrazilUniv Roma Tor Vergata, Fac Med & Surg, Rome, ItalyTunisian Res Lab Sports Performance Optimizat Nat, Tunis, TunisiaFed Univ Mato Grosso Sul UFMS, Lab Res Exercise Physiol, Campo Grande, BrazilUniv Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto, Ribeirao Preto, BrazilSao Paulo State Univ UNESP, Dept Phys Educ, Bauru, Brazi
Testimonianza dell'"evento a gessi" nei depositi di avanfossa della Val Roveto (Appennino centrale): considerazioni sull'estensione spazio-temporale dell'avanfossa messiniana
No full textIn this paper some hypothesis about the time-space extension of the Messinian foredeep of the central Apennines are suggested. In particular, the structural setting of the portion of the Roveto Valley between Cappadocia and Petrella Liri is discussed, and some geochemical results from gypsum minerals collected in the flysch of the Roveto Valley are presented. The dimension (10-20 mm) and the attitude of these gypsum minerals (c-axes parallel to the strata surface) allow to suggest a diagenetic origin. Moreover, the 87Sr/86Sr values of these small gypsum crystals are the same of the Messinian evaporites of the Italian region (MÙLLER and MUELLER. 1991; AHARON et alii, 1993). So, we suggest for these diagenetically gypsum an origin from high salinity interstitial waters, relics of Messinian evaporated waters (Messinian salinity crisis). This hypothesis allow to extend up Lo the late Messinian the activity of the Salto-Tagliacozzo-Marsica foredeep. In this way, the clastic wedge of this foredeep basin would be coeval to the Laga basin siliciclastic deposits
