The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors stati... more The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors static-stretching (SS) on the passive range of movement (ROM) of the stretched limb, surface electromyography (sEMG) and single-leg bounce drop jump (SBDJ) performance measures of the ipsilateral stretched and contralateral non-stretched lower limbs. Seventeen young men (24 ± 5 years) performed SBDJ before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) unilateral ankle plantar flexor SS (6 sets of 45s/15s, 70-90% point of discomfort). SBDJ performance measures included jump height, impulse, time to reach peak force, contact time as well as the sEMG integral (IEMG) and pre-activation (IEMGpre-activation) of the gastrocnemius lateralis. Ankle dorsiflexion passive ROM increased in the stretched limb after the SS (pre-test: 21 ± 4° and post-test: 26.5 ± 5°, p < 0.001). Post-stretching decreases were observed with peak fo...
The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors st... more The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors static- stretching on surface electromyography (sEMG) and the center of pressure (COP) during a single-leg balance task in both lower limbs. Fourteen young healthy, non-athletic individuals performed unipodal quiet standing for 30s before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) a unilateral ankle plantar flexor static- stretching protocol [6 sets of 45s/15s, 70-90% point of discomfort (POD)]. Postural sway was described using the COP area, COP speed (antero-posterior and medio-lateral directions) and COP frequency (antero-posterior and medio-lateral directions). Surface EMG (EMG integral [IEMG] and Median frequency[FM]) was used to describe the muscular activity of gastrocnemius lateralis. Ankle dorsiflexion passive range of motion increased in the stretched limb before and after the static-stretching protocol...
Actually the strength training has been widely used in different contexts and for different purpo... more Actually the strength training has been widely used in different contexts and for different purposes: athletic, recreational, esthetic and therapeutic. Undoubtedly, one of the most widely used exercises in strength training, aiming at the development of the muscles is the squat. The present study aimed to review several anatomical, biomechanical and kinesiological aspects of the squat exercise, as well as their possible variations as differences in lower limb positioning, the effects in the amplitude of the execution, differences between guided and non-guided exercise and the differences in positioning of the bar related to the trunk. The understanding of several variations can influence in the correct prescription, correction and orientation of this exercise for strength training or rehabilitation. In this way, after the review of several papers about this exercise, we can conclude that the different variations and conditions imposed on the squat exercise may result in changes in t...
Journal of strength and conditioning research / National Strength & Conditioning Association, Jan 10, 2015
The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint ... more The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint kinematics, dynamic muscle activation from the vastus lateralis and gluteus maximus, and rating of perceived exertion (RPE) during the back squat exercise at two different intensities. Fourteen resistance-trained men (age: 24±4 years, height: 176±6cm, body mass: 81±11kg, back squat 1RM: 107±30kg, 3±1 years of back squat experience) performed one set of 3 repetitions under four different conditions, to a depth of ∼90 degrees of knee joint flexion, and in random order: with knee wraps at 60% 1RM (KW60), with knee wraps at 90% 1RM (KW90), without knee wraps at 60% 1RM (NW60), and without knee wraps at 90% 1RM (NW90). The dependent variables obtained were vertical and horizontal bar displacement, peak joint angle in the sagittal plane (hip and knee joints), concentric and eccentric muscle activation (by integrated electromyography) from the vastus lateralis (VL) and gluteus maximus (GM), and...
ABSTRACT OBJECTIVE: To investigate muscle activation of the shoulder extensors and trunk stabiliz... more ABSTRACT OBJECTIVE: To investigate muscle activation of the shoulder extensors and trunk stabilizers by surface electromyography (sEMG) activity during the isometric Ab Wheel Rollout exercise in different shoulder joint positions. METHOD: We recruited 8 young, healthy, resistance trained men (age: 25 ± 3 years, height: 178 ± 5 cm, and total body mass: 81 ± 2 kg). All subjects performed two sets of 10 sec. maximal isometric contractions of the Ab Wheel Rollout exercise keeping the knees fixed on the floor and the arms taut. To perform the exercise, all subjects were randomly assessed in the following three positions related to the angle between the arms and trunk, in random order: arms aligned vertically with the Ab Wheel Rollout exercise (neutral); 90° and 150°. A rest period of 5 minutes was provided between tests. The sEMG signals were recorded in the following muscles: Latissimus Dorsi; Pectoralis Major; Erector Spinae; Rectus Abdominis. RESULTS: There were significant increases in Rectus Abdominis muscle activity between: neutral x 90°, neutral x 150° and 90° x 150°. There was a significant increase in Pectoralis Major muscle activity between neutral x 150°. CONCLUSIONS: The present findings indicate that (a) Ab Wheel Rollout exercise emphasizes the muscle action of the Pectoralis Major and Rectus Abdominis more than the Latissimus Dorsi and Erector Spinae; (b) the level of muscle activation depends on the external force created by the body mass and lever arm from the center of mass.
International Journal of Sports Science & Coaching
The purpose of this study was to evaluate the acute effects of static-stretching (SS) session wit... more The purpose of this study was to evaluate the acute effects of static-stretching (SS) session with (intermittent) and without (continuous) rest intervals between sets on the bounce drop jump performance, with the same volume and intensity. The experimental protocol consisted of (1) a brief warm-up using sub-maximal jumps; (2) a preSS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for each lower limb); (3) ankle plantar flexors SS protocol (intermittent or continuous) was used only for a single-lower limb; (4) immediate post-SS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for the stretched lower limb). Then, subjects rest for 30 minutes and the topics 3-4 were repeated with the other lower limb and stretching protocol. The intensity used for both stretching protocols was between 70-90% of the point of discomfort. There were significant decrease in jumping height performance for both stretching protocols: continuo...
RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com peso... more RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com pesos na performance motora. Quatorze atletas, do sexo masculino, participantes de competições nacionais de triathlon. O treinamento foi desenvolvido em 24 sessões de treinamento de força durante 12 semanas, sendo que a fase de adaptação (FA) teve duração de 8 sessões, utilizando carga de 60% a 65% de uma repetição máxima (1RM). A fase especifica, constou de 16 sessões e utilizou carga de 65% a 80% de 1RM. A intervenção se deu subdividindo-se os sujeitos em grupo experimental e grupo controle, onde o grupo experimental realizou treinamentos com pesos e o grupo controle não realizou treinamentos de força. Foram realizadas avaliações de performance em três momentos distintos: 1. antes de iniciar o treinamento com pesos, 2. após quatro semanas de treinamento e 3. após doze semanas de treinamento. Foi utilizada uma ANOVA (2x3) medidas repetidas para o % de gordura, massa corporal magra, teste de...
Journal of strength and conditioning research / National Strength & Conditioning Association, Jan 10, 2015
The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint ... more The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint kinematics, dynamic muscle activation from the vastus lateralis and gluteus maximus, and rating of perceived exertion (RPE) during the back squat exercise at two different intensities. Fourteen resistance-trained men (age: 24±4 years, height: 176±6cm, body mass: 81±11kg, back squat 1RM: 107±30kg, 3±1 years of back squat experience) performed one set of 3 repetitions under four different conditions, to a depth of ∼90 degrees of knee joint flexion, and in random order: with knee wraps at 60% 1RM (KW60), with knee wraps at 90% 1RM (KW90), without knee wraps at 60% 1RM (NW60), and without knee wraps at 90% 1RM (NW90). The dependent variables obtained were vertical and horizontal bar displacement, peak joint angle in the sagittal plane (hip and knee joints), concentric and eccentric muscle activation (by integrated electromyography) from the vastus lateralis (VL) and gluteus maximus (GM), and...
The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors st... more The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors static- stretching on surface electromyography (sEMG) and the center of pressure (COP) during a single-leg balance task in both lower limbs. Fourteen young healthy, non-athletic individuals performed unipodal quiet standing for 30s before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) a unilateral ankle plantar flexor static- stretching protocol [6 sets of 45s/15s, 70-90% point of discomfort (POD)]. Postural sway was described using the COP area, COP speed (antero-posterior and medio-lateral directions) and COP frequency (antero-posterior and medio-lateral directions). Surface EMG (EMG integral [IEMG] and Median frequency[FM]) was used to describe the muscular activity of gastrocnemius lateralis. Ankle dorsiflexion passive range of motion increased in the stretched limb before and after the static-stretching protocol...
Actually the strength training has been widely used in different contexts and for different purpo... more Actually the strength training has been widely used in different contexts and for different purposes: athletic, recreational, esthetic and therapeutic. Undoubtedly, one of the most widely used exercises in strength training, aiming at the development of the muscles is the squat. The present study aimed to review several anatomical, biomechanical and kinesiological aspects of the squat exercise, as well as their possible variations as differences in lower limb positioning, the effects in the amplitude of the execution, differences between guided and non-guided exercise and the differences in positioning of the bar related to the trunk. The understanding of several variations can influence in the correct prescription, correction and orientation of this exercise for strength training or rehabilitation. In this way, after the review of several papers about this exercise, we can conclude that the different variations and conditions imposed on the squat exercise may result in changes in t...
The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors stati... more The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors static-stretching (SS) on the passive range of movement (ROM) of the stretched limb, surface electromyography (sEMG) and single-leg bounce drop jump (SBDJ) performance measures of the ipsilateral stretched and contralateral non-stretched lower limbs. Seventeen young men (24 ± 5 years) performed SBDJ before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) unilateral ankle plantar flexor SS (6 sets of 45s/15s, 70-90% point of discomfort). SBDJ performance measures included jump height, impulse, time to reach peak force, contact time as well as the sEMG integral (IEMG) and pre-activation (IEMGpre-activation) of the gastrocnemius lateralis. Ankle dorsiflexion passive ROM increased in the stretched limb after the SS (pre-test: 21 ± 4° and post-test: 26.5 ± 5°, p < 0.001). Post-stretching decreases were observed with peak fo...
RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com peso... more RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com pesos na performance motora. Quatorze atletas, do sexo masculino, participantes de competições nacionais de triathlon. O treinamento foi desenvolvido em 24 sessões de treinamento de força durante 12 semanas, sendo que a fase de adaptação (FA) teve duração de 8 sessões, utilizando carga de 60% a 65% de uma repetição máxima (1RM). A fase especifica, constou de 16 sessões e utilizou carga de 65% a 80% de 1RM. A intervenção se deu subdividindo-se os sujeitos em grupo experimental e grupo controle, onde o grupo experimental realizou treinamentos com pesos e o grupo controle não realizou treinamentos de força. Foram realizadas avaliações de performance em três momentos distintos: 1. antes de iniciar o treinamento com pesos, 2. após quatro semanas de treinamento e 3. após doze semanas de treinamento. Foi utilizada uma ANOVA (2x3) medidas repetidas para o % de gordura, massa corporal magra, teste de...
International Journal of Sports Science & Coaching
The purpose of this study was to evaluate the acute effects of static-stretching (SS) session wit... more The purpose of this study was to evaluate the acute effects of static-stretching (SS) session with (intermittent) and without (continuous) rest intervals between sets on the bounce drop jump performance, with the same volume and intensity. The experimental protocol consisted of (1) a brief warm-up using sub-maximal jumps; (2) a preSS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for each lower limb); (3) ankle plantar flexors SS protocol (intermittent or continuous) was used only for a single-lower limb; (4) immediate post-SS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for the stretched lower limb). Then, subjects rest for 30 minutes and the topics 3-4 were repeated with the other lower limb and stretching protocol. The intensity used for both stretching protocols was between 70-90% of the point of discomfort. There were significant decrease in jumping height performance for both stretching protocols: continuo...
The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors stati... more The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors static-stretching (SS) on the passive range of movement (ROM) of the stretched limb, surface electromyography (sEMG) and single-leg bounce drop jump (SBDJ) performance measures of the ipsilateral stretched and contralateral non-stretched lower limbs. Seventeen young men (24 ± 5 years) performed SBDJ before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) unilateral ankle plantar flexor SS (6 sets of 45s/15s, 70-90% point of discomfort). SBDJ performance measures included jump height, impulse, time to reach peak force, contact time as well as the sEMG integral (IEMG) and pre-activation (IEMGpre-activation) of the gastrocnemius lateralis. Ankle dorsiflexion passive ROM increased in the stretched limb after the SS (pre-test: 21 ± 4° and post-test: 26.5 ± 5°, p < 0.001). Post-stretching decreases were observed with peak fo...
The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors st... more The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors static- stretching on surface electromyography (sEMG) and the center of pressure (COP) during a single-leg balance task in both lower limbs. Fourteen young healthy, non-athletic individuals performed unipodal quiet standing for 30s before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) a unilateral ankle plantar flexor static- stretching protocol [6 sets of 45s/15s, 70-90% point of discomfort (POD)]. Postural sway was described using the COP area, COP speed (antero-posterior and medio-lateral directions) and COP frequency (antero-posterior and medio-lateral directions). Surface EMG (EMG integral [IEMG] and Median frequency[FM]) was used to describe the muscular activity of gastrocnemius lateralis. Ankle dorsiflexion passive range of motion increased in the stretched limb before and after the static-stretching protocol...
Actually the strength training has been widely used in different contexts and for different purpo... more Actually the strength training has been widely used in different contexts and for different purposes: athletic, recreational, esthetic and therapeutic. Undoubtedly, one of the most widely used exercises in strength training, aiming at the development of the muscles is the squat. The present study aimed to review several anatomical, biomechanical and kinesiological aspects of the squat exercise, as well as their possible variations as differences in lower limb positioning, the effects in the amplitude of the execution, differences between guided and non-guided exercise and the differences in positioning of the bar related to the trunk. The understanding of several variations can influence in the correct prescription, correction and orientation of this exercise for strength training or rehabilitation. In this way, after the review of several papers about this exercise, we can conclude that the different variations and conditions imposed on the squat exercise may result in changes in t...
Journal of strength and conditioning research / National Strength & Conditioning Association, Jan 10, 2015
The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint ... more The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint kinematics, dynamic muscle activation from the vastus lateralis and gluteus maximus, and rating of perceived exertion (RPE) during the back squat exercise at two different intensities. Fourteen resistance-trained men (age: 24±4 years, height: 176±6cm, body mass: 81±11kg, back squat 1RM: 107±30kg, 3±1 years of back squat experience) performed one set of 3 repetitions under four different conditions, to a depth of ∼90 degrees of knee joint flexion, and in random order: with knee wraps at 60% 1RM (KW60), with knee wraps at 90% 1RM (KW90), without knee wraps at 60% 1RM (NW60), and without knee wraps at 90% 1RM (NW90). The dependent variables obtained were vertical and horizontal bar displacement, peak joint angle in the sagittal plane (hip and knee joints), concentric and eccentric muscle activation (by integrated electromyography) from the vastus lateralis (VL) and gluteus maximus (GM), and...
ABSTRACT OBJECTIVE: To investigate muscle activation of the shoulder extensors and trunk stabiliz... more ABSTRACT OBJECTIVE: To investigate muscle activation of the shoulder extensors and trunk stabilizers by surface electromyography (sEMG) activity during the isometric Ab Wheel Rollout exercise in different shoulder joint positions. METHOD: We recruited 8 young, healthy, resistance trained men (age: 25 ± 3 years, height: 178 ± 5 cm, and total body mass: 81 ± 2 kg). All subjects performed two sets of 10 sec. maximal isometric contractions of the Ab Wheel Rollout exercise keeping the knees fixed on the floor and the arms taut. To perform the exercise, all subjects were randomly assessed in the following three positions related to the angle between the arms and trunk, in random order: arms aligned vertically with the Ab Wheel Rollout exercise (neutral); 90° and 150°. A rest period of 5 minutes was provided between tests. The sEMG signals were recorded in the following muscles: Latissimus Dorsi; Pectoralis Major; Erector Spinae; Rectus Abdominis. RESULTS: There were significant increases in Rectus Abdominis muscle activity between: neutral x 90°, neutral x 150° and 90° x 150°. There was a significant increase in Pectoralis Major muscle activity between neutral x 150°. CONCLUSIONS: The present findings indicate that (a) Ab Wheel Rollout exercise emphasizes the muscle action of the Pectoralis Major and Rectus Abdominis more than the Latissimus Dorsi and Erector Spinae; (b) the level of muscle activation depends on the external force created by the body mass and lever arm from the center of mass.
International Journal of Sports Science & Coaching
The purpose of this study was to evaluate the acute effects of static-stretching (SS) session wit... more The purpose of this study was to evaluate the acute effects of static-stretching (SS) session with (intermittent) and without (continuous) rest intervals between sets on the bounce drop jump performance, with the same volume and intensity. The experimental protocol consisted of (1) a brief warm-up using sub-maximal jumps; (2) a preSS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for each lower limb); (3) ankle plantar flexors SS protocol (intermittent or continuous) was used only for a single-lower limb; (4) immediate post-SS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for the stretched lower limb). Then, subjects rest for 30 minutes and the topics 3-4 were repeated with the other lower limb and stretching protocol. The intensity used for both stretching protocols was between 70-90% of the point of discomfort. There were significant decrease in jumping height performance for both stretching protocols: continuo...
RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com peso... more RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com pesos na performance motora. Quatorze atletas, do sexo masculino, participantes de competições nacionais de triathlon. O treinamento foi desenvolvido em 24 sessões de treinamento de força durante 12 semanas, sendo que a fase de adaptação (FA) teve duração de 8 sessões, utilizando carga de 60% a 65% de uma repetição máxima (1RM). A fase especifica, constou de 16 sessões e utilizou carga de 65% a 80% de 1RM. A intervenção se deu subdividindo-se os sujeitos em grupo experimental e grupo controle, onde o grupo experimental realizou treinamentos com pesos e o grupo controle não realizou treinamentos de força. Foram realizadas avaliações de performance em três momentos distintos: 1. antes de iniciar o treinamento com pesos, 2. após quatro semanas de treinamento e 3. após doze semanas de treinamento. Foi utilizada uma ANOVA (2x3) medidas repetidas para o % de gordura, massa corporal magra, teste de...
Journal of strength and conditioning research / National Strength & Conditioning Association, Jan 10, 2015
The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint ... more The purposes of this study were to measure the acute effects of knee wraps on knee and hip joint kinematics, dynamic muscle activation from the vastus lateralis and gluteus maximus, and rating of perceived exertion (RPE) during the back squat exercise at two different intensities. Fourteen resistance-trained men (age: 24±4 years, height: 176±6cm, body mass: 81±11kg, back squat 1RM: 107±30kg, 3±1 years of back squat experience) performed one set of 3 repetitions under four different conditions, to a depth of ∼90 degrees of knee joint flexion, and in random order: with knee wraps at 60% 1RM (KW60), with knee wraps at 90% 1RM (KW90), without knee wraps at 60% 1RM (NW60), and without knee wraps at 90% 1RM (NW90). The dependent variables obtained were vertical and horizontal bar displacement, peak joint angle in the sagittal plane (hip and knee joints), concentric and eccentric muscle activation (by integrated electromyography) from the vastus lateralis (VL) and gluteus maximus (GM), and...
The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors st... more The aim of this study was to investigate the acute effects of unilateral ankle plantar flexors static- stretching on surface electromyography (sEMG) and the center of pressure (COP) during a single-leg balance task in both lower limbs. Fourteen young healthy, non-athletic individuals performed unipodal quiet standing for 30s before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) a unilateral ankle plantar flexor static- stretching protocol [6 sets of 45s/15s, 70-90% point of discomfort (POD)]. Postural sway was described using the COP area, COP speed (antero-posterior and medio-lateral directions) and COP frequency (antero-posterior and medio-lateral directions). Surface EMG (EMG integral [IEMG] and Median frequency[FM]) was used to describe the muscular activity of gastrocnemius lateralis. Ankle dorsiflexion passive range of motion increased in the stretched limb before and after the static-stretching protocol...
Actually the strength training has been widely used in different contexts and for different purpo... more Actually the strength training has been widely used in different contexts and for different purposes: athletic, recreational, esthetic and therapeutic. Undoubtedly, one of the most widely used exercises in strength training, aiming at the development of the muscles is the squat. The present study aimed to review several anatomical, biomechanical and kinesiological aspects of the squat exercise, as well as their possible variations as differences in lower limb positioning, the effects in the amplitude of the execution, differences between guided and non-guided exercise and the differences in positioning of the bar related to the trunk. The understanding of several variations can influence in the correct prescription, correction and orientation of this exercise for strength training or rehabilitation. In this way, after the review of several papers about this exercise, we can conclude that the different variations and conditions imposed on the squat exercise may result in changes in t...
The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors stati... more The aim of this study was to evaluate the acute effects of unilateral ankle plantar flexors static-stretching (SS) on the passive range of movement (ROM) of the stretched limb, surface electromyography (sEMG) and single-leg bounce drop jump (SBDJ) performance measures of the ipsilateral stretched and contralateral non-stretched lower limbs. Seventeen young men (24 ± 5 years) performed SBDJ before and after (stretched limb: immediately post-stretch, 10 and 20 minutes and non-stretched limb: immediately post-stretch) unilateral ankle plantar flexor SS (6 sets of 45s/15s, 70-90% point of discomfort). SBDJ performance measures included jump height, impulse, time to reach peak force, contact time as well as the sEMG integral (IEMG) and pre-activation (IEMGpre-activation) of the gastrocnemius lateralis. Ankle dorsiflexion passive ROM increased in the stretched limb after the SS (pre-test: 21 ± 4° and post-test: 26.5 ± 5°, p < 0.001). Post-stretching decreases were observed with peak fo...
RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com peso... more RESUMO O objetivo deste estudo foi investigar a influência de um programa de treinamento com pesos na performance motora. Quatorze atletas, do sexo masculino, participantes de competições nacionais de triathlon. O treinamento foi desenvolvido em 24 sessões de treinamento de força durante 12 semanas, sendo que a fase de adaptação (FA) teve duração de 8 sessões, utilizando carga de 60% a 65% de uma repetição máxima (1RM). A fase especifica, constou de 16 sessões e utilizou carga de 65% a 80% de 1RM. A intervenção se deu subdividindo-se os sujeitos em grupo experimental e grupo controle, onde o grupo experimental realizou treinamentos com pesos e o grupo controle não realizou treinamentos de força. Foram realizadas avaliações de performance em três momentos distintos: 1. antes de iniciar o treinamento com pesos, 2. após quatro semanas de treinamento e 3. após doze semanas de treinamento. Foi utilizada uma ANOVA (2x3) medidas repetidas para o % de gordura, massa corporal magra, teste de...
International Journal of Sports Science & Coaching
The purpose of this study was to evaluate the acute effects of static-stretching (SS) session wit... more The purpose of this study was to evaluate the acute effects of static-stretching (SS) session with (intermittent) and without (continuous) rest intervals between sets on the bounce drop jump performance, with the same volume and intensity. The experimental protocol consisted of (1) a brief warm-up using sub-maximal jumps; (2) a preSS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for each lower limb); (3) ankle plantar flexors SS protocol (intermittent or continuous) was used only for a single-lower limb; (4) immediate post-SS evaluation (passive ankle ROM and three trials of maximal single-leg jumping task for the stretched lower limb). Then, subjects rest for 30 minutes and the topics 3-4 were repeated with the other lower limb and stretching protocol. The intensity used for both stretching protocols was between 70-90% of the point of discomfort. There were significant decrease in jumping height performance for both stretching protocols: continuo...
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