Renato Alvarenga | Universidade Federal do Rio de Janeiro (UFRJ) (original) (raw)

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Papers by Renato Alvarenga

Research paper thumbnail of Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology

German Journal of Exercise and Sport Research, 2020

Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology Methods Literat... more Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology Methods Literature search A literature search was conducted in the PubMed database from 1995 to November 2019 focusing on the effects of resistance training on skeletal muscle hypertrophy. The following terms were use in the search: "skeletal muscle protein syn-German Journal of Exercise and Sport Research Review thesis, " "resistance training and intensity, " "resistance training and volume, " "resistance training and rest interval, " "resistance training and type of contraction, " "resistance training and velocity of contraction, " "resistance training and exercise order, " and "resistance training and frequency, " which returned relevant articles in the field of applying the snowball strategy. All titles and abstracts from the search were cross-referenced to identify duplicates and any potential missing studies. Titles and abstracts were screened for a subsequent full-text review. Reference lists of selected articles were also considered. Inclusion and exclusion criteria Research studies investigating the role of anabolic intracellular signaling pathways for exercise-derived anabolism/ hypertrophy and demonstrating its applicability in resistance training were the primary focus of the literature search. Considering this, the review includes only original studies that examined anabolic intracellular signaling pathways, the performance of resistance exercise or resistance training, or skeletal muscle hypertrophy. No distinctions were made between the tools used to document hypertrophy (dual energy X-ray absorptiometry [DEXA], ultrasound, magnetic resonance imaging [MRI]) in the articles that were included in the search. The exclusion criteria for this review included: articles not written in English, studies conducted with non-mammals or eukaryotic cells, research conducted only with pathogenic, immature, or elderly subjects/animals, and studies published before 1995. In total, 66 studies met the criteria described in this review.

Research paper thumbnail of Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology

German Journal of Exercise and Sport Research, 2020

Research paper thumbnail of ASSESSMENT OF KNEE OSTEOARTHRITIS BY BIOELECTRICAL IMPEDANCE

This study aimed to investigate the application of a bioimpedance spectroscopy technique, based o... more This study aimed to investigate the application of a bioimpedance spectroscopy technique, based on the current response to a voltage step excitation, as a diagnosis tool to the knee osteoarthritis problem. Up to now, 14 individuals (4 men and 10 women) have participated of the study, being grouped as health subjects (NG) and subjects with knee osteoarthritis diagnosis (OG). A total of 28 bioelectrical impedance measurements in the knee joint have been made. The average value of the knee intracellular resistance was of 281 ± 82.6  in the NG and 143 ± 33.9  in the OG. Besides this difference is statistically significant (p<0.01) between the groups, ratio between the intracellular and extracellular resistances, that was of the 1.6 ± 0.5 in the NG and 0.8 ± 0.2 in the OG, seems to be a better index to be used in the diagnosis. The results of this study suggest that the proposed method of bioelectrical impedance evaluation, when applied the diagnosis of the knee, is a valid method to determine the inflammatory pathological conditions of this joint.

Research paper thumbnail of Cancun bia renato 2003

This study aimed to investigate the application of a bioimpedance spectroscopy technique, based o... more This study aimed to investigate the application of a bioimpedance spectroscopy technique, based on the current response to a voltage step excitation, as a diagnosis tool to the knee osteoarthritis problem. Up to now, 14 individuals (4 men and 10 women) have participated of the study, being grouped as health subjects (NG) and subjects with knee osteoarthritis diagnosis (OG). A total of 28 bioelectrical impedance measurements in the knee joint have been made. The average value of the knee intracellular resistance was of 281 ± 82.6  in the NG and 143 ± 33.9  in the OG. Besides this difference is statistically significant (p<0.01) between the groups, ratio between the intracellular and extracellular resistances, that was of the 1.6 ± 0.5 in the NG and 0.8 ± 0.2 in the OG, seems to be a better index to be used in the diagnosis. The results of this study suggest that the proposed method of bioelectrical impedance evaluation, when applied the diagnosis of the knee, is a valid method to determine the inflammatory pathological conditions of this joint.

Research paper thumbnail of Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology

German Journal of Exercise and Sport Research, 2020

Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology Methods Literat... more Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology Methods Literature search A literature search was conducted in the PubMed database from 1995 to November 2019 focusing on the effects of resistance training on skeletal muscle hypertrophy. The following terms were use in the search: "skeletal muscle protein syn-German Journal of Exercise and Sport Research Review thesis, " "resistance training and intensity, " "resistance training and volume, " "resistance training and rest interval, " "resistance training and type of contraction, " "resistance training and velocity of contraction, " "resistance training and exercise order, " and "resistance training and frequency, " which returned relevant articles in the field of applying the snowball strategy. All titles and abstracts from the search were cross-referenced to identify duplicates and any potential missing studies. Titles and abstracts were screened for a subsequent full-text review. Reference lists of selected articles were also considered. Inclusion and exclusion criteria Research studies investigating the role of anabolic intracellular signaling pathways for exercise-derived anabolism/ hypertrophy and demonstrating its applicability in resistance training were the primary focus of the literature search. Considering this, the review includes only original studies that examined anabolic intracellular signaling pathways, the performance of resistance exercise or resistance training, or skeletal muscle hypertrophy. No distinctions were made between the tools used to document hypertrophy (dual energy X-ray absorptiometry [DEXA], ultrasound, magnetic resonance imaging [MRI]) in the articles that were included in the search. The exclusion criteria for this review included: articles not written in English, studies conducted with non-mammals or eukaryotic cells, research conducted only with pathogenic, immature, or elderly subjects/animals, and studies published before 1995. In total, 66 studies met the criteria described in this review.

Research paper thumbnail of Skeletal muscle hypertrophy: molecular and applied aspects of exercise physiology

German Journal of Exercise and Sport Research, 2020

Research paper thumbnail of ASSESSMENT OF KNEE OSTEOARTHRITIS BY BIOELECTRICAL IMPEDANCE

This study aimed to investigate the application of a bioimpedance spectroscopy technique, based o... more This study aimed to investigate the application of a bioimpedance spectroscopy technique, based on the current response to a voltage step excitation, as a diagnosis tool to the knee osteoarthritis problem. Up to now, 14 individuals (4 men and 10 women) have participated of the study, being grouped as health subjects (NG) and subjects with knee osteoarthritis diagnosis (OG). A total of 28 bioelectrical impedance measurements in the knee joint have been made. The average value of the knee intracellular resistance was of 281 ± 82.6  in the NG and 143 ± 33.9  in the OG. Besides this difference is statistically significant (p<0.01) between the groups, ratio between the intracellular and extracellular resistances, that was of the 1.6 ± 0.5 in the NG and 0.8 ± 0.2 in the OG, seems to be a better index to be used in the diagnosis. The results of this study suggest that the proposed method of bioelectrical impedance evaluation, when applied the diagnosis of the knee, is a valid method to determine the inflammatory pathological conditions of this joint.

Research paper thumbnail of Cancun bia renato 2003

This study aimed to investigate the application of a bioimpedance spectroscopy technique, based o... more This study aimed to investigate the application of a bioimpedance spectroscopy technique, based on the current response to a voltage step excitation, as a diagnosis tool to the knee osteoarthritis problem. Up to now, 14 individuals (4 men and 10 women) have participated of the study, being grouped as health subjects (NG) and subjects with knee osteoarthritis diagnosis (OG). A total of 28 bioelectrical impedance measurements in the knee joint have been made. The average value of the knee intracellular resistance was of 281 ± 82.6  in the NG and 143 ± 33.9  in the OG. Besides this difference is statistically significant (p<0.01) between the groups, ratio between the intracellular and extracellular resistances, that was of the 1.6 ± 0.5 in the NG and 0.8 ± 0.2 in the OG, seems to be a better index to be used in the diagnosis. The results of this study suggest that the proposed method of bioelectrical impedance evaluation, when applied the diagnosis of the knee, is a valid method to determine the inflammatory pathological conditions of this joint.