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Comparison of Cardiorespiratory and Metabolic Responses Between Kettlebell Half Marathon and Treadmill Running at the Same Average Oxygen Consumption: A Case Study

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Journal of Science in Sport and Exercise 2021年第4期3卷 379-384页

作者： Davide Greco Luca Calanni Giuseppe Cerullo massimo negro Giuseppe D’Antona CRIAMS-Sport Medicine Centre University of PaviaVogheraItaly Department of Movement Sciences and Wellbeing Parthenope UniversityNaplesItaly Department of Public Health Experimental and Forensic Medicine and Sport Medicine Centre VogheraUniversity of Paviavia Foscolo1327058 VogheraItaly

Purposes In kettlebell sport(KS)half marathon,the lift of the kettlebell is required for the highest number of repetitions in 30 *** data are available on cardiorespiratory and metabolic responses during this exercise *** aim of the study was to evaluate cardiopulmonary and metabolic responses to KS half marathon compared to 30 min treadmill running,chosen as a reference paradigm of aerobic exercise,at the same average oxygen consumption(VO_(2)).Methods A male elite KS athlete was enrolled in two trials separated by 7 days of *** the first trial,one-hand long-cycle KS exercise with a 1/3 body weight kettlebell was performed for 30 min(kettlebell half marathon,KT);in the second trial,30 min treadmill running(TR)was performed at the same average VO2 measured in the first trial(speed 9-10 km/h at 1°uphill inclination).Metabolic and cardiopulmonary assessments[respiratory exchange ratio(RER),tidal volume(TV),breathing frequency(f),minute ventilation(VE)],blood lactate(BL)kinetics,heart rate(HR),and blood pressure(BP)were measured in both experimental *** The average VO_(2) was 33.3 mL/min/kg in KT and 30.6 mL/min/kg in *** subject achieved RER_(peak) 1.17,RER_(mean) 0.98,HR_(peak) 172 bpm(94% HR_(max)),HR_(mean) 86% of HR_(max),BP_(peak) 220/100 mmHg in KT,BL_(peak) 7.2 mmol/L(during trial)in KT and RER_(peak) 1.13,RER_(mean) 0.89,HR_(peak) 142 bpm(78%HR_(max)),HR_(mean) 70% of HR_(max),BP_(peak) 160/80 mmHg,BL_(peak) 3.5 mmol/L(4 min after trial)mmol/L in *** Data indicate that a KS half marathon determines much higher cardiopulmonary and metabolic responses to treadmill running performed at similar VO_(2).

关键词： Kettlebell sport Blood lactate Blood pressure Heart rate Oxygen consumption

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Correlations Between Myoelectric and Hemodynamic Parameters Changes in Biceps Brachii During Sustained Isometric Contraction in Healthy Elderly

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Journal of Science in Sport and Exercise 2019年第2期1卷 116-123页

作者： Cristian Zampella Luca Calanni Marco Barbero Corrado Cescon Giuseppe Giovanetti massimo negro Giuseppe D’Antona CRIAMS-Sport Medicine Centre University of PaviaVogheraItaly Rehabilitation Research Laboratory 2rLab Department of Business EconomicsHealth and Social CareUniversity of Applied Sciences and Arts of Southern SwitzerlandMannoSwitzerland Department of Public Health Experimental and Forensic Medicine and Sport Medicine Centre VogheraUniversity of PaviaVia Foscolo1327058 VogheraPaviaItaly

Purpose The purpose of the present study was to evaluate the Pearson correlations between hemodynamic parameters obtained with near infrared spectroscopy (NIRS), namely total hemoglobin (tHb) and tissue oxygen index (TOI %), as indica-tors of blood flow and oxygen extraction, and myoelectric parameters obtained with surface multichannel electromyography (sEMG), namely fractal dimension (FD) and conduction velocity (CV) slopes, as descriptors of central and peripheral fatigue, during sustained high level isometric contractions at 60% maximal voluntary contraction (MVC), in elderly subjects. Methods Ten recreationally healthy elderly subjects (age 67.7 ± 4.6 years), 5 males and 5 females, performed one isometric contraction of the elbow flexors at 120° joint angle at 60% of MVC until exhaustion in two subsequent trials 1 week apart, one for the sEMG and the other one for NIRS recordings from the biceps brachii. Results A negative strong Pearson’s correlation between TOI % slope in the functional hyperemic phase (HP) of contrac-tion and a positive correlation between the slope of TOI % recorded during the ischemic phase (IP) and the CV slope were found (r = − 0.76, P < 0.05;r = 0.91, P < 0.01, respectively). A negative strong correlation between tHb IP slope and tHb HP slope and TOI % IP slope and TOI % HP slope (r = − 0.78, P < 0.01;r = − 0.78, P < 0.01, respectively) were also found. No correlation was found between FD slope and hemodynamic parameters (FD slope vs. HP tHb slope, r = − 0.19;FD slope vs. IP tHb slope, r = 0.16;FD slope vs. HP TOI % slope, r = 0.19;FD slope vs. IP TOI % slope, r = 0.27). Conclusion In aged individuals, CV slope correlated with muscle O2 desaturation (TOI %) rather than reduced muscle blood flow (tHb) in the ischemic phase of isometric contraction to exhaustion. No correlations were found between myoelectric manifestations of central fatigue (FD slope) and data obtained by NIRS.

关键词： Correlation between NIRS sEMG during muscle contraction

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Petrogenesis of Quebrada de la Mina and Altar North porphyries (Cordillera of San Juan, Argentina): Crustal assimilation and metallogenic implications

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Geoscience Frontiers 2017年第5期8卷 1135-1159页

作者： Laura Maydagán Marta Franchini massimo Chiaradia Verónica Bouhier Noelia Di Giuseppe Roger Rey Luis Dimieri Centro Patagónico de Estudios Metalogenéticos-CONICET Argentina INGEOSUR-CONICET Departamento de Geología Universidad Nacional del Sur San Juan 670 8000 Bahía Blanca Argentina Instituto de Investigación en Paleobiología y Geología Universidad Nacional de Río Negro Av. Roca 1242 8332 Roca Argentina Departamento de Geología y Petróleo Facultad de Ingeniería Universidad Nacional del Comahue Buenos Aires 1400 8300 Neuquén Argentina Section of Earth and Environmental Sciences University of Geneva Switzerland Minera Peregrine Argentina S.A Santa Fe (Oeste) 117 Piso 4B Edificio Derby Ciudad San Juan Argentina

We investigate the geology of Altar North(Cu-Au) and Quebrada de la Mina(Au) porphyry deposits located in San Juan Province(Argentina), close to the large Altar porphyry copper deposit(995 Mt,0.35% Cu, 0.083 g/t Au), to present constraints on the magmatic processes that occurred in the parental magma chambers of these magmatic-hydrothermal systems. Altar North deposit comprises a plagioclase-amphibole-phyric dacite intrusion(Altar North barren porphyry) and a plagioclaseamphibole-biotite-phyric dacite stock(Altar North mineralized porphyry, 11.98 ± 0.19 Ma). In Quebrada de la Mina, a plagioclase-amphibole-biotite-quartz-phyric dacite stock(QDM porphyry,11.91±0.33 Ma) crops out. High Sr/Y ratios(92-142) and amphibole compositions of Altar North barren and QDM porphyries reflect high magmatic oxidation states(fO_2= NNO+1.1 to+1.6) and high fH_2O conditions in their magmas. Zones and rims enriched in anorthite(An_(37-48))), SrO(0.22-0.33 wt.%)and FeO(0.21-0.37 wt.%) in plagioclase phenocrysts are evidences of magmatic recharge processes in the magma chambers. Altar North and Quebrada de la Mina intrusions have relatively homogeneous isotopic compositions(^(87)Sr/^(86)Sr_(t)= 0.70450-0.70466, ε_(ND)(t) = +0.2 to +1.2) consistent with mixed mantle and crust contributions in their magmas. Higher Pb isotopes ratios(^(207)Pb/^(204)Pb=15.6276-15.6294) of these intrusions compared to other porphyries of the district, reflect an increase in the assimilation of high radiogenic Pb components in the magmas. Ages of zircon xenocrysts(297,210,204,69 Ma) revealed that the magmas have experienced assimilation of Miocene, Cretaceous, Triassic and Carboniferous crustal *** that precipitated sulfides in the Altar deposit may have remobilized Pb from the host rocks, as indicated by the ore minerals being more radiogenic(207Pb/204 Pb = 15.6243-15.6269) than their host intrusions. Au/Cu ratio in Altar porphyries(average Au/Cu ratio of 0.14 ×10^(-4)by weight in Altar Central)is hig

关键词： Porphyry High sulfidation epithermal Magmatic recharge Radiogenic isotopes Crustal assimilation Argentinian Andes

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