Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 44
Filtrar
Más filtros

País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
Int J Sports Med ; 44(9): 664-672, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-36863405

RESUMEN

This study verified the relationship between body size and skeletal age (SA) with the behavior of blood markers of muscle damage and delayed onset muscle soreness (DOMS) after a soccer match in the U-13 and U-15 categories. The sample consisted of 28 soccer players in the U-13 and 16 in the U-15 categories. Creatine kinase (CK), lactate dehydrogenase (LDH), and DOMS were evaluated up to 72 h after the match. Muscle damage was elevated at 0 h in U-13, and from 0 h to 24 h in U-15. DOMS increased from 0 h to 72 h in U-13 and from 0 h to 48 h in U-15. Significant associations of SA and fat-free mass (FFM) with muscle damage markers and DOMS were observed only in U-13, specifically at time 0 h, when SA explained 56% of CK and 48% of DOMS and FFM explained 48% of DOMS. We concluded that in the U-13 category, higher SA is significantly associated with muscle damage markers, and increase in FFM is associated with muscle damage markers and DOMS. Furthermore, U-13 players need 24 h to recover pre-match muscle damage markers and more than 72 h to recover DOMS. In contrast, the U-15 category needs 48 h to recover muscle damage markers and 72 h to recover DOMS.


Asunto(s)
Fútbol , Humanos , Fútbol/fisiología , Músculo Esquelético , Determinación de la Edad por el Esqueleto , Biomarcadores , Mialgia , Creatina Quinasa , Tamaño Corporal
2.
J Strength Cond Res ; 36(4): 991-997, 2022 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-32379240

RESUMEN

ABSTRACT: Cristina-Souza, G, Santos-Mariano, AC, Lima-Silva, AE, Costa, PL, Domingos, PR, Silva, SF, Abreu, WC, De-Oliveira, FR, and Osiecki, R. Panax Ginseng supplementation increases muscle recruitment, attenuates perceived effort, and accelerates muscle force recovery after an eccentric-based exercise in athletes. J Strength Cond Res 36(4): 991-997, 2022-The effect of Panax ginseng during and after an eccentric-based exercise is underexplored. In this study, we investigated the effect of Panax ginseng on muscle force and muscle excitation during an eccentric-based exercise and on subsequent muscle damage and delayed-onset muscle soreness (DOMS). Using a randomized, double-blind, crossover design, 10 male track and field athletes consumed Panax ginseng or placebo for 8 days. At the fifth day, they performed 4 sets until concentric failure of a half-squat exercise, with eccentric action increased by using an eccentric-inductor device attached to their knees. The rating of perceived exertion (RPE) and vastus lateralis electromyographic (EMG) activity was measured during the half-squat. Plasma lactate dehydrogenase (LDH) and creatine kinase (CK) concentrations, DOMS, and maximal isometric voluntary contractions (MIVCs) with EMG recording were measured at 24, 48, and 72 hours after the half-squat. Panax ginseng attenuated RPE and increased EMG during the sets. The MIVC remained reduced 48 hours after exercise in the placebo but returned to baseline 24 hours after exercise in the Panax ginseng, with values at 24 and 48 hours after exercise significantly higher in the Panax ginseng than in the placebo. The EMG during MIVC was higher in the Panax ginseng than in the placebo over the time points. No significant effect of Panax ginseng on LDH, CK, and DOMS was observed. These findings suggest that Panax ginseng increases muscle excitation and attenuates perceived effort during an eccentric-based exercise as well as accelerates the recovery of muscle force in well-trained athletes.


Asunto(s)
Panax , Atletas , Suplementos Dietéticos , Humanos , Masculino , Músculo Esquelético/fisiología , Mialgia/tratamiento farmacológico
3.
J Sports Sci ; 37(16): 1824-1830, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-30939987

RESUMEN

The menstrual cycle (MC) phases carry to several psychophysiological alterations; however, no study has investigated the impact of MC phases on training load or technical training. In the present study, we investigated the effect of the follicular phase (FP), ovulatory phase (OP), and luteal phase (LP) on training load and technical training in young athletes. Twelve female athletes performed regular daily training sessions with the rating of perceived exertion (RPE) and duration being registered every session. Training impulse (TRIMP), monotony and strain were calculated. MC symptoms, RPE, and duration were also measured during technical training, which was carried out on a specific day during each phase. The TRIMP was not affected by MC phases during regular training (p > .05), but training monotony and strain were higher in FP compared to OP (p < .05). During the technical training, MC phases did not affect RPE (p > .05), but the session was longer in both FP and LP, compared to OP (p < .05). MC symptoms were exacerbated in FP compared to both OP and LP (p < .05). These findings suggest that MC disorders were elevated during FP, which indicate that monitoring MC phases might provide important feedbacks for programming training and expected results during competitions.


Asunto(s)
Ciclo Menstrual/fisiología , Ciclo Menstrual/psicología , Acondicionamiento Físico Humano/fisiología , Acondicionamiento Físico Humano/psicología , Atletismo/fisiología , Atletismo/psicología , Adolescente , Estradiol/sangre , Femenino , Hormona Folículo Estimulante/sangre , Frecuencia Cardíaca/fisiología , Humanos , Hormona Luteinizante/sangre , Percepción/fisiología , Acondicionamiento Físico Humano/métodos , Esfuerzo Físico/fisiología , Progesterona/sangre , Estrés Psicológico , Factores de Tiempo
5.
Int J Sport Nutr Exerc Metab ; 24(5): 532-42, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24936871

RESUMEN

The objective of this study was to evaluate the effect of a reduced-carbohydrate (reduced-CHO) diet on the rate of perceived exertion (RPE) curve during an incremental test. Nine physically active men performed a progressive incremental test on a cycle ergometer (25 W · 2 min(-1)) after 72 hr on either a control diet (60% CHO) or a reduced-CHO diet (30% CHO). Lactate and RPE thresholds were identified using the Dmax method (DmaxLa and DmaxRPE, respectively). Power output, heart rate and RPE scores in DmaxLa and DmaxRPE were similar between the diets and were not different from each other, regardless of the diet. Lactate values were consistently higher (p < .05) in the control diet compared with the reduced-CHO diet during power output after the lactate breakpoint; however, they were not accompanied by a proportional increase in RPE scores. These results suggest that DmaxRPE and DmaxLa are not dissociated after a short-period reduced-CHO diet, whereas the lactate values after the lactate threshold are reduced with a reduced-CHO diet, although they are not accompanied by alterations in RPE.


Asunto(s)
Dieta Baja en Carbohidratos , Carbohidratos de la Dieta/administración & dosificación , Ejercicio Físico , Ácido Láctico/sangre , Esfuerzo Físico , Adulto , Ciclismo , Ejercicio Físico/fisiología , Prueba de Esfuerzo , Frecuencia Cardíaca , Humanos , Masculino , Percepción , Esfuerzo Físico/fisiología , Adulto Joven
6.
Genet Mol Biol ; 37(3): 490-5, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25249770

RESUMEN

In this study, we investigated the influence of two SNPs (rs846910 and rs12086634) of the HSD11B1 gene that encodes 11ß-hydroxysteroid dehydrogenase type 1(11ß-HSD1), the enzyme that catalyzes the conversion of cortisol to cortisone, on variables associated with obesity and metabolic syndrome in 215 individuals of both sexes from southern Brazil. The HSD11B1 gene variants were genotyped using the TaqMan SNP genotyping assay. Glucose, triglycerides, total cholesterol, HDL-cholesterol and LDL-cholesterol were measured by standard automated methods. Significant results were found in women, with carriers of the G allele of SNP rs12086634 having higher glucose levels than non-carriers. Carriers of the A allele of SNP rs846910 had higher levels of HDL-cholesterol. The involvement of both polymorphisms as independent factors in determining the levels of glucose and HDL-cholesterol was confirmed by multiple regression analysis (ß = 0.19 ±0.09, p = 0.03 and ß= 0.22 ± 0.10, p = 0.03, respectively). Our findings suggest that the HSD11B1SNPs studied may indirectly influence glucose and HDL-cholesterol metabolism in women, possibly through down-regulation of the HSD11B1 gene by estrogen.

7.
Pharm Biol ; 52(8): 956-60, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24601939

RESUMEN

CONTEXT: Caffeine can stimulate insulin secretion by attenuating hyperglycemia in diabetes models with significant reduction of pancreatic functional ß cells. Knowledge of these mechanisms could contribute to new strategies for treating diabetes. OBJECTIVE: This study evaluated the effects of caffeine and physical exercise on glycemic and insulin responses in diabetic rats. MATERIALS AND METHODS: The diabetes model was induced by intraperitoneal administration of 60 mg/kg of streptozotocin (STZ). Animals were divided into six groups: control, caffeine, STZ control, STZ caffeine, STZ sulfonylurea, and STZ caffeine + sulfonylurea. Acutely, control animals received 6 mg of caffeine and 10 mg/kg sulfonylurea or 10 mg/kg saline. Animals were sacrificed after physical exercise; blood samples were collected for glucose, glycerol, lactate, and insulin analyses. Cardiovascular responses were recorded before and after treatments. A one-way ANOVA and the post hoc Student-Newman-Keuls test were used to analyze statistical differences between treatments (p < 0.05). RESULTS: About 6 mg/kg of caffeine did not alter cardiovascular responses, but promoted blood glucose reduction after 60 min of exercise when compared to animals in the control groups (387-187 mg/dL; p < 0.05). Insulin levels increased significantly (0.6-10 µU/mL; p < 0.05) in rats that received acute caffeine treatment associated with sulfonylurea compared to rats in the other groups. DISCUSSION AND CONCLUSION: Acute caffeine intake with exercise can increase glucose uptake enhancing insulin secretion stimulated by sulfonylurea in ß cells-deficient pancreas. The results indicate the potential use of caffeine as a strategy for glycemic and insulin control in diabetes.


Asunto(s)
Cafeína/administración & dosificación , Diabetes Mellitus Experimental/tratamiento farmacológico , Hiperglucemia/tratamiento farmacológico , Insulina/metabolismo , Condicionamiento Físico Animal/fisiología , Compuestos de Sulfonilurea/administración & dosificación , Animales , Glucemia/efectos de los fármacos , Glucemia/metabolismo , Diabetes Mellitus Experimental/sangre , Quimioterapia Combinada , Hiperglucemia/sangre , Secreción de Insulina , Masculino , Condicionamiento Físico Animal/métodos , Ratas , Ratas Wistar
8.
Sports (Basel) ; 11(12)2023 Dec 11.
Artículo en Inglés | MEDLINE | ID: mdl-38133109

RESUMEN

The current study verified the acute responses of participants to a football match in terms of blood markers. Sixteen elite U-18 male football players were divided into two groups: experimental (EG, n = 10), who played a friendly football match; and control (CG), who were not exposed to any physical exertion. Intravenous blood samples were collected from both groups at baseline, pre-match, half-time, and post-match. The blood analysis consisted of four groups: immunological (leukocytes, platelets, and cortisol), muscle damage (creatine kinase and lactate dehydrogenase), metabolic (lactate, glucose, erythrocytes, hematocrit, hemoglobin, and urea), and electrolytic (sodium, calcium, and potassium). Edwards' training impulse demonstrated that the first half was more demanding than the second half (p = 0.020). Significant changes between time points and groups were observed for leukocytes (pre-match: 6920 ± 1949; post-match: 13,890 ± 3292; p ≤ 0.05) and cortisol (pre-match: 10.78 ± 3.63; post-match: 19.15 ± 7.40; p ≤ 0.05). CK (pre-match: 516.50 ± 248.38; post-match: 713.70 ± 308.20; p ≤ 0.05) and LDH (pre-match: 348.80 ± 36.49; post-match: 414.80 ± 26.55; p ≤ 0.05) increased significantly across the time points for the EG, with no difference between the groups, however. Raised lactate (pre-match: 1.05 ± 0.32; post-match: 3.24 ± 1.60; p ≤ 0.05) and glucose (pre-match: 72.54 ± 9.76; post-match: 101.42 ± 19.87; p ≤ 0.05) differences between the groups at half-time were also observed. These current findings provide helpful information to better understand football match demands regarding physiological effects.

9.
Life Sci ; 321: 121440, 2023 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-36921686

RESUMEN

Peripheral blood mononuclear cells (PBMCs) are a variety of specialized immune cells produced in the bone marrow from hematopoietic stem cells (HSCs) that work together to protect our bodies from harmful pathogens. From a metabolic point of view, these cells can serve as sentinel tissue source for distinguishing multiple types of whole-body physiological perturbations. The significant interaction of PBMCs with systemic physiology makes these cells an attractive target for several interventions such as physical exercise. Analyses of oxidative/inflammatory and metabolic markers of PBMCs obtained from unhealthy and healthy humans have been used in monitoring immune response in different exercise conditions. It is already a common consensus that regular practice of physical exercise, that is planned, structured, and repetitive, influences personal health by altering the metabolic state and the immune system. However, the role of distinct metabolic processes responsible for maintaining metabolic balance during physical exercise in PBMCs is not fully understood. Furthermore, a complete dose-response analysis between different exercise protocols and biomarkers capable of predicting physical performance needs to be better elucidated. The absence of published reviews on this topic compromises the understanding of the crosstalk between the metabolic adaptations of PBMCs and exercise-induced changes in the immune system. Given the above, this review highlights the main findings in the literature involving the responses of PBMCs in the inflammatory/oxidative stress induced by physical exercise. The present review also highlights how distinct phenotypes and functional diversity of PBMCs make these cells an accessible alternative for assessing exercise-induced metabolic adaptations.


Asunto(s)
Metabolismo Energético , Ejercicio Físico , Leucocitos Mononucleares , Estrés Oxidativo , Humanos , Leucocitos Mononucleares/metabolismo , Inflamación/metabolismo
10.
ScientificWorldJournal ; 2012: 348246, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22919304

RESUMEN

The essential hypertension has been associated with membrane cell damage. The aim of the present study is investigate the relationship between erythrocyte Na(+),K(+)-ATPase and lipoperoxidation in prehypertensive patients compared to normotensive status. The present study involved the prehypertensive patients (systolic: 136 ± 7 mmHg; diastolic: 86.8 ± 6.3 mmHg; n = 8) and healthy men with normal blood pressure (systolic: 110 ± 6.4 mmHg; diastolic: 76.1 ± 4.2 mmHg; n = 8) who were matched for age (35 ± 4 years old). The venous blood samples of antecubital vein (5 mL) were collected into a tube containing sodium heparin as anticoagulant (1000 UI), and erythrocyte ghosts were prepared for quantifying Na(+),K(+)-ATPase activity. The extent of the thiobarbituric acid reactive substances (TBARS) was determined in plasma. The statistical analysis was carried out by Student's t-test and Pearson's correlation coefficient. A P < 0.05 was considered significant. The Na(+),K(+)-ATPase activity was lower in prehypertensive patients compared with normotensive subjects (4.9 versus 8.0 nmol Pi/mg protein/min; P < 0.05). The Na(+),K(+)-ATPase activity correlated negatively with TBARS content (r = -0.6; P < 0.05) and diastolic blood pressure (r = -0.84; P < 0.05). The present study suggests that Na(+),K(+)-ATPase activity reduction and elevation of the TBARS content may underlie the pathophysiological aspects linked to the prehypertensive status.


Asunto(s)
Eritrocitos/enzimología , Prehipertensión/sangre , ATPasa Intercambiadora de Sodio-Potasio/sangre , Sustancias Reactivas al Ácido Tiobarbitúrico/metabolismo , Estudios de Casos y Controles , Humanos , Masculino , Prehipertensión/enzimología , Prehipertensión/metabolismo
11.
Percept Mot Skills ; 128(4): 1530-1548, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-33818161

RESUMEN

The purpose of this study was to verify the effectiveness of the rate of perceived exertion threshold (RPET) for predicting young competitive swimmers' lactate threshold (LT) during incremental testing. We enrolled 13 male athletes (M age = 16, SD = 0.6 years) in an incremental test protocol consisting of eight repetitions of a 100-meter crawl with 2-minute intervals between each repetition. We collected data for blood lactate concentration ([La]) and Borg scale rate of perceived exertion (RPE) at the end of each repetition. The results obtained were: M RPET = 4.98, SD = 1.12 arbitrary units (A.U.) and M lactate threshold = 4.24, SD = 1.12 mmol.L-1, with [La] and RPE identified by the maximal deviation (Dmax) method without a significant difference (p > 0.05) and large correlations between DmaxLa and DmaxRPE at variables for time (r = 0.64), velocity (r = 0.67) and percentage of personal best time (PB) (r = 0.60). These results suggest that RPET is a good predictor of LT in young competitive swimmers.


Asunto(s)
Ácido Láctico , Esfuerzo Físico , Adolescente , Frecuencia Cardíaca , Humanos , Masculino
12.
Front Sports Act Living ; 3: 733309, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34746775

RESUMEN

Risk behaviors and signs of burnout are associated with substantial health losses and university dropouts. Physical activity can be an effective approach to reduce these factors. The objective of this study was to analyze aspects related to health behaviors, physical activity, and signs of burnout in university students and their association with physical activity. The probabilistic cluster sample consisted of 3,578 regularly enrolled undergraduate students from UFPR in Curitiba, based on a population sample of 24,032 university students. The students completed the MBI-SS and NCHA II instruments. Descriptive statistics were used to identify demographic indicators and characteristics of the university environment. For the proportion of subjects with respective confidence intervals (CI = 95%), contingency tables involving the chi-square test (χ2) were used. The prevalence of signs of burnout was estimated in punctual proportions accompanied by the respective confidence intervals (CI = 95%). To analyze the associations between the independent variables and signs of burnout, the Hierarchical Logistic Regression was used through an analysis adjusted by the other independent variables involved in the models (CI = 95%). Results showed that the prevalence of individuals who showed signs of burnout was 40.4%. The hierarchical multiple regression model pointed to: female sex (OR = 1.30; 1.11-1.51); age between 20-24 years (OR = 1.51; 1.25-1.83); and 25-29 years (OR = 1.69; 1.27-2.24); being single (OR = 2.67; 1.01-7.10); presenting regular/poor health perception (OR = 1.59; 1.13-2.22), belonging to Human Sciences courses (OR = 1.37; 1.14-1.64); attending 2nd or 3rd year (OR = 1.34; 1.12-1.61); poor academic performance (OR = 5.35; 4.11-6.96); mean (OR = 2.08; 1.78-2.43). We conclude that academics showed a high prevalence of health risk behaviors and correlate and diagnose emotional problems and signs of burnout. Signs of burnout were significantly associated with the practice of physical activity in its three dimensions; however, in the adjusted analysis for demographic indicators, the characteristics of the university environment, and health behaviors, physical activity was not significant for the model.

13.
Res Q Exerc Sport ; 92(1): 63-70, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32027579

RESUMEN

Purpose: To analyze the contribution of physical measures and external load in the match-based internal load of elite soccer players. Methods: Twenty-three elite soccer players (n = 23, age 26.69 ± 3.93 years, body mass 78.04 ± 5.03 kg, height 178.04 ± 5.19 cm, body fat 10.98 ± 1.25%) from a first division soccer team of the Brazilian Championship were evaluated first with anthropometric and physical measures (flexibility and muscle power of lower limbs), and after 24 hrs they were asked to perform an incremental treadmill test (VO2max and ventilatory thresholds). Subsequently, athletes were monitored for 6 weeks during nine official matches of a regional championship. On match days, the external load data (e.g., player load) were collected by triaxial accelerometers with GPS systems and post 30 min after the end of the match the internal load was assessed with the Session Rating of Perceived Exertion method (Session-RPE). Results: Our main findings showed significant contributions of the Player Load (r = .62, p < .001; 42.3%) and Anaerobic Threshold (r = - .199, p = .05, 17%) for the predictive model of Session-RPE. Conclusions: Physical measures and external load have a significant influence on the internal load in elite soccer players. Our findings suggest that sport scientists can use the Session-RPE as a low-cost method for prescribing and monitoring training loads, by the influence of physical measures and external load on the match-based internal load, in order to optimize athletes' performance.


Asunto(s)
Rendimiento Atlético/fisiología , Conducta Competitiva/fisiología , Percepción/fisiología , Esfuerzo Físico/fisiología , Fútbol/fisiología , Acelerometría/métodos , Adulto , Umbral Anaerobio , Brasil , Capacidad Cardiovascular , Prueba de Esfuerzo , Sistemas de Información Geográfica , Humanos , Extremidad Inferior/fisiología , Masculino , Fuerza Muscular , Adulto Joven
14.
Res Q Exerc Sport ; 91(3): 469-477, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31986105

RESUMEN

Purpose: The aim of the study was to verify the agreement between preplanned and executed pacing during a 3-km race and determine whether adjustments are mediated by the rating of perceived exertion (RPE). Method: Thirteen young runners (eight males and five females, 17.5 ± 2.1 and 17.0 ± 1.6 years old, respectively) with national and international experience participated in the study. Before the simulated competition, the athletes informed of their preplanned pacing for the distance through a dashboard with the most common pacing profiles and were also asked to complete a questionnaire communicating their preplanned RPE for each lap of race. During 3-km, heart rate (HR), executed RPE and lap time were recorded. Results: Our results showed no significant association between preplanned and executed pacing (p = .631). Moreover, no significant difference between preplanned and executed RPE was found, including the analysis by laps and phases. RPE and HR increased over time during the race (p < .001). Conclusions: The athletes changed from their preplanned pacing, however, their RPE were similar in the preplanned and executed during the 3-km race. These findings indicate that the RPE could be responsible for adjustments in the pacing strategy.


Asunto(s)
Conducta Competitiva/fisiología , Percepción/fisiología , Esfuerzo Físico/fisiología , Carrera/psicología , Adolescente , Femenino , Frecuencia Cardíaca/fisiología , Humanos , Masculino , Resistencia Física/fisiología , Carrera/fisiología
15.
Percept Mot Skills ; 125(2): 329-350, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29368530

RESUMEN

This study examined the extent to which different high-intensity interval training (HIIT) and sprint interval training (SIT) protocols could influence psychophysiological responses in moderately active young men. Fourteen participants completed, in a randomized order, three cycling protocols (SIT: 4 × 30-second all-out sprints; Tabata: 7 × 20 seconds at 170% ⋮O2max; and HIIT: 10 × 60 seconds at 90% HRmax) and three running HIIT protocols (4 × 4 minutes at 90%-95% HRmax, 5 × at v⋮O2max, and 4 × 1,000 meters at a rating of perceived exertion (RPE) of 8, from the OMNI-Walk/Run scale). Oxygen uptake (⋮O2), heart rate, and RPE were recorded during each interval. Affective responses were assessed before and after each trial. The Tabata protocol elicited the highest ⋮O2 and RPE responses, and the least pleasant session-affect among the cycling trials. The v⋮O2max elicited the highest ⋮O2 and RPE responses and the lowest mean session-affect among the running trials. Findings highlight the limited application of SIT and some HIIT protocols to individuals with low fitness levels.


Asunto(s)
Afecto/fisiología , Frecuencia Cardíaca/fisiología , Entrenamiento de Intervalos de Alta Intensidad , Consumo de Oxígeno/fisiología , Esfuerzo Físico/fisiología , Aptitud Física/fisiología , Adulto , Humanos , Masculino , Adulto Joven
16.
Motriz (Online) ; 28: e10220005821, 2022. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1394480

RESUMEN

Abstract Aim: This study aimed to analyze the difference between tactical, technical, and physical variables in selected and unselected top players of the 2018 FIFA World Cup. Methods: A sample data of 1049 soccer players were collected by the multiple-camera computerised tracking system. Subsequently, data were analyzed and divided into two groups: selected (man of the match and top 10 players of the World Cup) and unselected players (other players). Twenty-six performance variables were used to assess tactical (passing), technical (goals, assist, shots, and fouls), and physical variables (height, distance covered, distance with and without the ball, number of sprints, maximal speed, and intensities zone 1 [low] to 5 [high]). Results: The selected players had more tactical (performed and completed more long, middle, and short pass), technical (goal for, assist, shots, shots on goal, fouls committed on them), and physical variables (covered more distance and distance with the ball, more sprints, greater speed and distance in low intensity [zone 1]). However, they were shorter in height and covered less distance in moderate intensity [zones 2 and 3] when compared to unselected players (p < 0.05). Conclusion: This study suggests that the selected players have more tactical, technical, and physical variables than the unselected players. Our findings could be used as a trustworthy tool (performance variables) to characterize the top players of the World Cup.


Asunto(s)
Humanos , Aptitud , Fútbol , Evaluación del Rendimiento de Empleados , Atletas , Análisis de Varianza , Análisis de Datos
17.
Motriz (Online) ; 28: e10220004521, 2022. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1360604

RESUMEN

Abstract Aim: This study analyzed the influences of ACE and ACTN3 gene variants in sprinters, jumpers, and endurance young athletes of track and field. Methods: 36 school-level competitors of both sex (15 girls and 21 boys; aged 16.4 ± 1.2 years; training experience 4 ± 1.2 years) practitioners of different sport disciplines (i.e., sprint, jump, and endurance athletes) participated in the study. The deoxyribonucleic acid (DNA) was extracted from peripheral blood using a standard protocol. Anthropometric measurements, 30 m sprint, squat jump (SJ), and maximal oxygen uptake (VO2max) tests were measured. Results: Genotype distribution of the ACE and ACTN3 genes did not differ between groups. In ACE DD and ACTN3 RX genotypes, the SJ test was bigger in sprinters and jumpers than in the endurance runners. In contrast, when analyzing the ACE ID genotype, sprinters had higher SJ than endurance athletes. Moreover, in the ACE DD genotype, the sprinters and jumpers' athletes had lower time in 30 m tests compared to endurance runners. However, the ACE ID and ACTN3 RX genotypes was greater aerobic fitness in endurance runners than in jumpers' athletes. Conclusion: Although the genetic profile is not a unique factor for determining athletic performance, the ACE DD and ACTN3 RX genotypes seem to favor athletic performance in power and sprint versus endurance sports. Thus, this study evidenced that assessing genetic variants could be used as an auxiliary way to predict a favorable profile for the identification of young talents of track and field.


Asunto(s)
Humanos , Aptitud , Atletismo , Atletas , Perfil Genético , ADN/análisis
18.
Appl Physiol Nutr Metab ; 41(4): 456-9, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26960443

RESUMEN

We investigated if the rate of perceived exertion (RPE) threshold is as sensitive as the lactate threshold to detect training differences. Lactate and RPE thresholds were identified in well-trained cyclists and physically active males. Power output was higher in well-trained cyclists than in physically active individuals for both thresholds (p < 0.05). Our results suggest that RPE threshold is successful in discriminating differences between well-trained cyclists and physically active individuals.


Asunto(s)
Ciclismo/fisiología , Ácido Láctico/sangre , Esfuerzo Físico , Tejido Adiposo , Adulto , Índice de Masa Corporal , Estudios Transversales , Ejercicio Físico/fisiología , Prueba de Esfuerzo , Frecuencia Cardíaca , Humanos , Masculino , Persona de Mediana Edad , Resistencia Física
19.
Meta Gene ; 5: 98-104, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26137445

RESUMEN

Adiponectin is an adipokine inversely correlated with obesity, which has beneficial effect on insulin resistance and lipid metabolism. Considering its potential as a therapeutic target in the metabolic disorder contexts, and in order to add knowledge in the area, our study evaluated the ADIPOQ 276G > T polymorphism effect on adiponectin levels, and on lipoproteins of clinical interest in a population sample composed of 211 healthy individuals. Significant effects were observed only among men: the carriers of heterozygous genotype (GT) showed high levels of adiponectin (p = 0.018), while the rare homozygous genotype (TT) gave its carriers a negative phenotype, represented by higher levels of low density lipoprotein cholesterol (LDL-C) (p = 0.004 and p = 0.005) and total cholesterol (TC) (p = 0.010 and p = 0.005) compared to carriers of other genotypes (GG and GT respectively), the independent effect of SNP on LDL-C and TC levels was confirmed by multiple regression analysis (p = 0.008 and p = 0.044). We found no evidence of correlation between circulating adiponectin levels and biochemical markers, which suggests, therefore, an SNP 276G > T independent effect on adiponectin levels and on lipoprotein metabolism in men enrolled in this study.

20.
Rev Salud Publica (Bogota) ; 16(4): 491-504, 2014.
Artículo en Portugués | MEDLINE | ID: mdl-25791301

RESUMEN

OBJECTIVE: This study was aimed at verifying smoking, alcohol consumption and sleep time associated with sociodemographic factors in physically active industrial workers in the state of Paraná in Brazil. METHODS: Nine hundred and seven subjects volunteered (71% men and 29% women) to answer a questionnaire aimed at assessing their quality of life and health (QVS-80). The volunteers included 389 physically active workers. The Chi-square test and Chi-square test for linear trend were used for analyzing the data so collected (p<0.05). RESULTS: Physical activity (PA) prevalence was higher amongst men (49%) compared to women (22%) (p<0.01). Younger women (p<0.01) having a higher educational level (p<0.01) trended to engage in PA (p<0.01). Smoking was identified in 15% of the active workers; this was associated with age (p<0.05) and educational level (p<0.01) in male workers. Alcohol abuse was present in 8% of men and 3% of women (p<0.05). Inadequate sleep time was associated with increased age (p<0.01) in both genders and lower family income (p<0.05) in women. CONCLUSION: Physically active workers had lower tobacco and alcohol consumption compared to physically inactive workers in previous studies.


Asunto(s)
Consumo de Bebidas Alcohólicas/epidemiología , Ejercicio Físico , Conductas Relacionadas con la Salud , Industrias , Salud Laboral/estadística & datos numéricos , Privación de Sueño/epidemiología , Fumar/epidemiología , Adolescente , Adulto , Anciano , Brasil/epidemiología , Estudios Transversales , Femenino , Encuestas Epidemiológicas , Humanos , Masculino , Persona de Mediana Edad , Calidad de Vida , Factores de Riesgo , Privación de Sueño/etiología , Factores Socioeconómicos , Adulto Joven
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA