PAULO HENRIQUE MARCHETTI
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- ALONGAMENTO INTERMITENTE E CONTÍNUO AUMENTAM A AMPLITUDE DE MOVIMENTO E REDUZEM A FORÇA DOS FLEXORES DE PUNHO(2015) MARCHETTI, Paulo Henrique; MATTOS, Viviane de Jesus P.; SERPA, Erica Paes; SILVA, Josinaldo Jarbas da; SOARES, Enrico Gori; PAULODETO, Antonio Claudio; CORREA, Daniel Alves; VILELA JUNIOR, Guanis de Barros; GOMES, Willy AndradeIntroduction: The management of rest interval among series can influence the performance of subsequent activities. Objective: To compare the effect of rest intervals during continuous and intermittent static stretching upon wrist flexor performance. Methods: The sample comprised 14 young, healthy male adults, (age: 31 +/- 9 years, height: 178 +/- 0.7 cm, weight: 85 +/- 12kg). Evaluation was carried out of the passive range of motion (PROM) in wrist extension, the maximum isometric strength of wrist flexion associated with surface electromyography before and after two stretching protocols with different intervals among series. For each subject, one of the upper limbs was stretched with the continuous protocol (CON) and the other with the intermittent (INT) protocol, randomly. As regards CON, it consisted in stretching during six uninterrupted minutes, whereas INT consisted in stretching six series of 1 minute for 20 seconds of rest interval among series. The intensity was kept at 70-90% of the subjective perception of discomfort. Results: The results of PROM showed significant increase between pre and post-intervention conditions, in both protocols INT (81 degrees +/- 10 and 94 degrees +/- 10, P< 0.001) and CON (87 degrees +/- 12 and 96 degrees +/- 11, P= 0.004). The results for peak force showed significant reduction in post-intervention conditions for both protocols: INT (205 +/- 54 Kgf and 148 +/- 56 Kgf, P< 0.001) and CON (211 +/- 39 Kg and 144 +/- 36 Kgf, P< 0.001). The results for the rate of force development showed significant increase in pre and post-intervention conditions for both protocols INT (0.52 +/- 0.29 Kgf/ms and 1.24 +/- 0.45 Kgf/ms, P< 0.001) and CON (0.43 +/- 0.29 Kgf/ms and 1.11 +/- 0.34 Kgf/ms, P< 0.001). Conclusion: Both protocols increased the passive range of motion, reduced the peak force and the rate of force development, without changes in the activation of wrist flexors.
- Muscle strength, postural balance, and cognition are associated with braking time during driving in older adults(2016) ALONSO, Angelica C.; PETERSON, Mark D.; BUSSE, Alexandre L.; JACOB-FILHO, Wilson; BORGES, Mauricio T. A.; SERRA, Marcos M.; LUNA, Natalia M. S.; MARCHETTI, Paulo H.; GREVE, Julia M. D. A.Background: Despite the well-known declines in driving performance with advancing age, there is little understanding of the specific factors that predict changes in key determinants such as braking time. Objectives: The aims of this study were to determine the extent to which age, muscle strength, cognition and postural balance are associated with braking performance in middle-aged and older adults. Methods: Male and female middle-aged adults (n = 62, age = 39.3 +/- 7.1 years) and older adults (n = 102, age = 70.4 +/- 5.8 years) were evaluated for braking performance, as well as in several motor and cognitive performance tasks. The motor evaluation included isokinetic ankle plantar flexor muscle strength, handgrip strength, and postural balance with and without a cognitive task. The cognitive assessment included the Mini Mental State Examination. Braking performance was measured using a driving simulator. Results: Older adults exhibited 17% slower braking time, lower strength, and poorer performance in the postural balance (p < 0.001). For both older and middle-aged adults, significant correlates of braking time included performance in the postural balance tests, muscle strength, and cognitive function. However, after full model adjustment, only postural balance and cognitive function were significantly associated. Conclusion: Muscle strength, postural balance, and cognition are associated with braking time, and may affect the safety of and driving performance in older adults. These findings may help to inform specific targeted interventions that could preserve driving performance during aging.
- ACUTE EFFECT OF THE ORDER OF TRADITIONAL AND PRE-EXHAUSTION EXERCISES IN RESISTANCE TRAINING(2016) SOARES, Enrico Gori; GOMES, Willy Andrade; PAULODETTO, Antonio Claudio; SERPA, Erica Paes; SILVA, Josinaldo Jarbas da; VILELA JUNIOR, Guanis de Barros; MARCHETTI, Paulo HenriqueIntroduction: Different orders in exercise sequences during resistance training can affect neuromuscular performance. Objective: To investigate the effect of resistance training exercises (pre-exhaustion and traditional) on the performance and muscle activity of pectoralis major (PM) and triceps brachii (TB) during execution of bench press (BP) and triceps extension (TE) exercises. Methods: The sample was composed by 14 trained men (age: 25 +/- 4 years, height: 175 +/- 4 cm, weight: 80 +/- 11 kg). The experiment was carried out in two sessions. In the first, familiarization and determination of 10 repetition maximum (RM) of BP and TE exercises were carried out. The second was divided in two phases. The first evaluated exercise performance separately (control condition, CON). The second evaluated two different exercise orders: pre-exhaustion, PE (TE and BP) and traditional, TRAD (BP and TE). Performance and muscle activity of PM and TB were evaluated. One-way ANOVA was used to compare conditions. ANOVA (2x3) of repeated measures was used to compare muscle activity. Results: The results showed a smaller number of RM on TE in TRAD condition in comparison to CON and PE. It was observed a smaller number of RM in BP exercise in PE condition in comparison to CON and TRAD. As to the muscle activity evaluated by integrated electromyography, no significant differences have been observed as to PM and TB during execution of both exercises in all conditions. Conclusion: It was concluded that in both strategies the number of RM performed in the second exercise was reduced, however alterations were not observed in the activation of the main muscles in each exercise.
article 22 Citação(ões) na Scopus Comparison between Pre-Exhaustion and Traditional Exercise Order on Muscle Activation and Performance in Trained Men(2016) SOARES, Enrico Gori; BROWN, Lee E.; GOMES, Willy Andrade; CORREA, Daniel Alves; SERPA, Erica Paes; SILVA, Josinaldo Jarbas da; VILELA JUNIOR, Guanis de Barros; FIORAVANTI, Gustavo Zorzi; AOKI, Marcelo Saldanha; LOPES, Charles Ricardo; MARCHETTI, Paulo HenriqueThe purpose of this study was to measure the acute effects of pre-exhaustion vs. traditional exercise order on neuromuscular performance and sEMG in trained men. Fourteen young, healthy, resistance trained men (age: 25.5 +/- 4.0 years, height: 174.9 +/- 4.1 cm, and total body mass: 80.0 +/- 11.1 kg) took part of this study. All tests were randomized and counterbalanced for all subjects and experimental conditions. Volunteers attended one session in the laboratory. First, they performed ten repetition maximum (10RM) tests for each exercise (bench press and triceps pushdown) separately. Secondly, they performed all three conditions at 10RM: pre-test (bench press and triceps pushdown, separately), pre-exhaustion (triceps push-down+ bench press, PE) and traditional (bench press+triceps pushdown, TR), and rested 30 minutes between conditions. Results showed that pre-test was significantly greater than PE (p = 0.031) but not different than TR, for total volume load lifted. There was a significant difference between the pre-test and the time-course of lactate measures (p = 0.07). For bench press muscle activity of the pectoralis major, the last repetition was significantly greater than the first repetition (pre-test: p = 0.006, PE: p = 0.016, and TR: p = 0.005). Also, for muscle activity of the triceps brachii, the last repetition was significantly greater than the first repetition (pre-test: p = 0.001, PE: p = 0.005, and TR: p = 0.006). For triceps pushdown, muscle activity of the triceps brachii, the last repetition was significantly greater than the first repetition (pre-test: p = 0.006, PE: p = 0.016, and TR: p = 0.005). For RPE, there were no significant differences between PE and TR (p = 0.15). Our results suggest that exercise order decreases repetitions performed, however, neuromuscular fatigue, lactate, and RPE are not impacted. The lack of difference in total volume load lifted between PE and TR might explain, at least in part, the similar metabolic and perceptual responses.- DIFFERENT WARM-UPS ON THE MAXIMUM REPETITION PERFORMANCE IN RESISTANCE TRAINING(2014) LUZ JUNIOR, Danilo Atanazio da; JUNOR, Aylton Figueira; SERPA, Erica Paes; GOMES, Willy Andrade; SOARES, Enrico Gori; LOPES, Charles Ricardo; TEIXEIRA, Luis Felipe Milano; MARCHETTI, Paulo HenriqueIntroduction: Although the warm-up is considered essential for sports, little is known about its effect on strength training. Objective: To evaluate the effect of different warm-up strategies in neuromuscular performance in young adults undergoing maximum repetitions of upper and lower limb exercises. Methods: Two experiments were conducted separately. For the first experiment, 16 healthy young adults performed a test of maximal repetitions at 70% 1RM in the bench press (previously determined). Four warm-up conditions were tested: control (CON) without prior warm-up, 5 min on the treadmill at 60% VO2max (EST), strength endurance (REF) with 1 set x 15 repetitions with 40% 1RM and maximal strength (MS) with two sets of two reps with 90% 1RM. For the second experiment, 14 healthy young adults performed a maximal number of repetitions at 70% 1RM in the unilateral leg press (previously determined). Five warm-up conditions were tested: control (CON) without prior warm-up, 5 min of cycling at 60% VO2max (BIC), 5 min on the treadmill to 60% VO2max (EST), strength endurance (REF) with 1 set vs. 15 repetitions with 40% 1RM and maximal strength (MS) with two sets of two reps with 90% 1RM. For both experiments the number of repetitions performed and perceived exertion were evaluated. Results: For the first experiment, the MS condition was superior when compared to other protocols. No differences between the other conditions were observed. For the second experiment differences between all protocols were observed, except CON and EST, being MS> BIC> REF> = CON. Conclusion: The results of this study suggest that a warming-up of maximum strength may produce higher force production for the upper and lower limbs. Additionally, aerobic and strength resistance warm-up showed an improvement in strength performance for the lower limbs in a smaller magnitude.
- Efeitos do alongamento passivo no desempenho de séries múltiplas no treinamento de força(2015) LOPES, Charles Ricardo; SOARES, Enrico Gori; SANTOS, Andre Luis Rodrigues; AOKI, Marcelo Saldanha; MARCHETTI, Paulo HenriqueIntroduction: Stretching exercises have been related to a performance deficit on strength-dependent activities. However, little is known about its effect on multiple sets of strength training. Objective: To determine the effect of an extensive stretching protocol on the performance of multiple sets and soreness in strength training. Methods: The sample was composed by 12 trained-men, experienced in strength training. The protocol consisted of three sessions. The first session was used as a familiarization and load determination to 10 maximum repetitions (T10RM). The second and third conditions were randomized between subjects, and the bench press exercise (BP) was evaluated without previous stretching protocol (SEMA), and with previous stretching protocol (COMA). The stretching protocol consisted of six sets of 45 sec of stretch with 15 sec of resting intervals to the pectoralis major muscle. The stretching intensity was kept between 70 and 90% of the subjective point of discomfort. The local soreness was evaluated before and after exercise by a brief stretching and palpation. The Analysis of Variance ANOVA (2x6) was used to compare the maximum number of repetitions. One-way ANOVA was used to compare the load of the first set of each condition (T10RM/SEMA/COMA). The Student t-test was used to compare the total load and soreness. Results: A decrease on maximum number of repetitions along the sets was observed in both conditions, without differences between them, for the load of the first set, total load and soreness. Conclusion: The number of repetitions in multiple sets was reduced in the same magnitude in the conditions with and without previous stretching; besides, it does not alter the total load or soreness.
- Efeitos agudos no desempenho do salto vertical após o agachamento com banda elástica de joelho(2015) GOMES, Willy Andrade; SILVA, Josinaldo Jarbas da; SOARES, Enrico Gori; SERPA, Erica Paes; CORRêA, Daniel Alves; VILELA JUNIOR, Guanis de Barros; LOPES, Charles Ricardo; MARCHETTI, Paulo HenriqueINTRODUCTION: Knee wraps can affect the muscular performance during high-intensity exercises by reducing muscle activation, which may influence the effect of post-activation potentiation, which depends on high intensity for the following power exercise. Objective: To investigate the acute effects on the performance with counter-movement jump (CMJ) after high-intensity squat with and without the use of knee wraps in resistance trained subjects.METHODS: The study included 14 men (aged 24±4 years, height: 176±6cm, weight: 81±11kg, 1RM: 107±30kgf) resistance trained (>3 years). Three SCM were performed before and after three back squats at 90% of 1RM with and without the knee wraps. During the CMJ muscle activation (IEMG) of the vastus lateralis (VL) and gluteus maximus (GM), jump time (JT), and impulse (IMP) through the force of vertical ground reaction (FRSV) were evaluated.RESULTS: The results show statistically significant differences for JT between post-back-squat conditions (with and without wrap) (P=0.044, TE=1.02), whereas the highest values were observed without knee wrap. For IEMG of VL significant difference between pre and post-conditions after back squat (with knee wrap) (P=0.029, TE=1.68) was observed, and the highest values were observed for the IEMG with knee wrap. No significant differences between conditions were observed for IEMG of GM and IMP.CONCLUSION: After using the knee wraps during the squat exercise, there was a reduction in the involvement of the vastus lateralis during the jump with counter-movement, affecting the contact time, but not the production of impulse and consequent performance.
- MUSCLE ACTIVATION DIFFERS BETWEEN PARTIAL AND FULL BACK SQUAT EXERCISE WITH EXTERNAL LOAD EQUATED(2017) SILVA, Josinaldo J. da; SCHOENFELD, Brad J.; MARCHETTI, Priscyla N.; PECORARO, Silvio L.; GREVE, Julia M. D.; MARCHETTI, Paulo H.Changes in range of motion affect the magnitude of the load during the squat exercise and, consequently, may influence muscle activation. The purpose of this study was to evaluate muscle activation between the partial and full back squat exercise with external load equated on a relative basis between conditions. Fifteen young, healthy, resistance-trained men (age: 26 +/- 5 years, height: 173 +/- 6 cm) performed a back squat at their 10 repetition maximum (10RM) using 2 different ranges of motion (partial and full) in a randomized, counterbalanced fashion. Surface electromyography was used to measure muscle activation of the vastus lateralis, vastus medialis, rectus femoris, biceps femoris (BF), semitendinosus, erector spinae, soleus (SL), and gluteus maximus (GM). In general, muscle activity was highest during the partial back squat for GM (p = 0.004), BF (p = 0.009), and SL (p = 0.031) when compared with full-back squat. There was no significant difference for rating of perceived exertion between partial and full back squat exercise at 10RM (8 +/- 1 and 9 +/- 1, respectively). In conclusion, the range of motion in the back squat alters muscle activation of the prime mover (GM) and stabilizers (SL and BF) when performed with the load equated on a relative basis. Thus, the partial back squat maximizes the level of muscle activation of the GM and associated stabilizer muscles.
- Acute bouts of upper and lower body static and dynamic stretching increase non-local joint range of motion(2016) BEHM, David George; CAVANAUGH, Tyler; QUIGLEY, Patrick; REID, Jonathan Christopher; NARDI, Priscyla Silva Monteiro; MARCHETTI, Paulo HenriqueThere are conflicts in the literature concerning the crossover or non-local effects of stretching. The objective of this study was to evaluate whether static (SS) and dynamic (DS) stretching of the shoulders would affect hip flexor range of motion (ROM) and performance and reciprocally whether SS and DS of the lower body would affect shoulder extension ROM and performance. A randomized crossover study design examined the acute effects of upper and lower body SS and DS on lower and upper body performance measures, respectively. Experimental sessions included upper and lower body control tests, upper body (shoulder horizontal abduction) SS and lower body (hip abduction) SS, upper body (shoulder horizontal abduction and adduction) DS and lower body DS (hip abduction and adduction). Passive static and dynamic ROM (hip flexion, shoulder extension), leg flexor and elbow flexor maximal voluntary contraction isometric force, fatigue endurance and electromyography were measured. There were significant shoulder ROM increases following lower body SS (P < 0.010, a dagger % = 8.2 %) and DS (P < 0.019, a dagger % = 9 %). There was a significant hip flexor ROM (P < 0.016, a dagger % = 5.2 %) increase following upper body SS. There were no significant main effects or interactions for dynamic ROM or muscle force and activation variables. The lack of stretch-induced force and fatigue changes suggests that rather than a mechanical or neural drive mechanism, an enhanced stretch tolerance was likely the significant factor in the improved ROM.
- Técnicas de aterrissagem afetam o desempenho e estresse mecânico durante Drop Jump(2017) MARCHETTI, Paulo Henrique; SANTOS, Thaís Tomaz dos; SOARES, Enrico Gori; SERPA, Erica Paes; SILVA, Josinaldo Jarbas da; MAGALHÃES, Roberto Aparecido; MIYATAKE, Marcelo Massatoshi Senaga; VILELA JUNIOR, Guanis de Barros; GOMES, Willy AndradeABSTRACT Introduction: The drop jump is used to improve the power of the lower limbs. Keeping the drop height constant, the variation of the landing technique can modify the performance and the mechanical characteristics of the jump. Objective: To evaluate the effects of different landing techniques on the performance and the reaction force of the vertical component of the ground after drop jump. Methods: Twenty-five healthy and physically active men (age: 26±8 years, total body mass: 75±10 kg, height: 175±10 cm) performed four landing techniques after the drop jump: bounce drop jump (BDJ), drop jump with 90° of knee flexion (DJ90), drop jump with 135° of knee flexion (DJ135), and drop jump with 135° of knee flexion with hands resting on the ground (DJ135A). Three attempts were performed for each technique; the subjects performed the drop jump falling from a 40 cm high force platform. The measures of jump height, contact time and impact were determined by the force of reaction of the vertical component of the ground, measured by the force platform, at a frequency of acquisition of 2,000 Hz. The repeated measures by ANOVA were used to compare the different techniques. Results: The BDJ technique presented lower jump height, shorter contact time and greater impact than the other techniques (P<0.001). The DJ90 technique presented jump height similar to the DJ135 and DJ135A techniques and a short contact time (P<0.001) and a lower impact than the other techniques (P<0.001). Conclusion: The highest jumps were observed for DJ90, DJ135 and DJ135A. The lowest contact time was observed in the BDJ technique, followed by DJ90. Regarding the impact, the BDJ technique presented the highest values.