Inhomogeneous Quadriceps Femoris Hypertrophy in Response to Strength and Power Training

Earp, Jacob E.; Newton, Robert U.; Cormie, Prue; Blazevich, Anthony J.

doi:10.1249/mss.0000000000000669

Cited by 77 publications

(119 citation statements)

References 37 publications

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“…This would be due to that (a) sufficient (2‐minutes) rest periods were taken between sets, and (b) each contraction was brief (training velocity was fast). It is worth noting that several studies have shown evidence of hypertrophy after training composed of brief (explosive), unfatiguing contractions, given a certain level of mechanical stress (eg, ECC‐leg in this study). Therefore, it seems that fatigue/metabolic stress is not a necessary stimulus for muscle hypertrophy.…”

Section: Discussionmentioning

confidence: 72%

“…Nevertheless, the current result suggests that RF is indeed preferentially trained by single‐joint ECC knee extension training. Interestingly, the available literature suggests that resistance training comprising multi‐joint leg extensions (ie, simultaneous knee extension and hip extension) such as the squats, rowing, and cycling induces less hypertrophy in RF than the vasti. Precise mechanisms for such exercise modality‐dependent inter‐muscle differences in QF hypertrophy are unknown, but are probably mainly attributable to the difference between RF and the vasti being bi‐ and mono‐articular muscles, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…In summary, after work‐matched maximal ECC vs CON training, only ECC‐leg showed a significant increase in muscle volume, with a greater degree for RF than the vasti. A growing body of evidence suggests that multi‐joint leg extension exercise represented by the squat, another one of the major training modalities for targeting QF, does not provide sufficient training stimuli to RF . Furthermore, it is well documented that prior exposure to ECC stimuli, but not CON stimuli, is crucial for muscle damage/strain injury prevention.…”

Section: Discussionmentioning

confidence: 99%

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Single-joint eccentric knee extension training preferentially trains the rectus femoris within the quadriceps muscles

et al. 2018

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Eccentric contraction‐induced quadriceps strains, particularly in the rectus femoris (RF), frequently occur in sports. By using MRI‐based transverse relaxation time (T2) as an index of exercise‐induced muscle edema, previous studies found pronounced damage in RF after an acute single‐joint eccentric knee extension exercise. This study examined whether single‐joint eccentric knee extension training would preferentially train RF, resulting in greater hypertrophy of RF than the other quadriceps muscles. Twelve males conducted work‐matched single‐joint isokinetic (180°/s) maximal eccentric contractions of the knee extensors in one leg (ECC‐leg) and concentric in the other (CON‐leg), six sets/session (3‐5 sets in the initial 1‐3 sessions), two sessions/wk for 10 weeks. Muscle volume of each quadriceps was measured pre‐ and post‐training. T2 of each muscle was assessed weekly throughout the training period and pre‐ and post‐training. Muscle volume significantly increased in all muscles in ECC‐leg only, with a greater degree for RF (+7.3%) than the vasti (2.9%‐3.7%). T2 did not change in all muscles throughout. These results suggest that RF can be preferentially trained by single‐joint eccentric knee extension training. Cooperatively with the potential repeated bout effect (ie, protective effect) in eccentric exercise, this training modality would have positive implications for strain injury prevention of RF.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Single-joint eccentric knee extension training preferentially trains the rectus femoris within the quadriceps muscles

et al. 2018

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“…In support of this notion, Earp et al . () reported that parallel and jump squat training induced insignificant changes in CSA of RF despite significant increases in CSA of vasti.…”

Section: Discussionmentioning

confidence: 90%

Inter‐ and intramuscular differences in training‐induced hypertrophy of the quadriceps femoris: association with muscle activation during the first training session

Wakahara

Ema

Miyamoto

et al. 2015

Clin Physio Funct Imaging

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The purpose of this study was to examine whether inter- and intramuscular differences in hypertrophy induced by resistance training correspond to differences in muscle activation during the first training session. Eleven young men completed 12 weeks of training intervention for knee extension. Before and after the intervention, T1-weighted magnetic resonance (MR) images were recorded to determine the volume and anatomical cross-sectional area (CSA) along the length of the individual muscles of the quadriceps femoris. The T2-weighted MR images were also acquired before and immediately after the first training session. The T2 was calculated for each pixel within the quadriceps femoris, from which the muscle activation was evaluated as %activated volume and area. The results showed that the %activated volume after the first training session was significantly higher in the vastus intermedius than the vastus medialis. However, the relative change in muscle volume after the training intervention was significantly greater in the rectus femoris than the vasti muscles (vastus lateralis, intermedius and medialis). Within the rectus femoris, both the %activated area and relative increase in CSA were significantly greater in the distal region than the proximal region. In contrast, the %activated area and relative increase in CSA of the vasti were nearly uniform along each muscle. These results suggest that the muscle activation during the first training session is associated with the intramuscular difference in hypertrophy induced by training intervention, but not with the intermuscular difference.

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“…A prática de exercícios na musculação pode proporcionar Revista Mundi Saúde e Biológicas. Curitiba, PR, v. 1, n. 2, 12, jul./dez., 2016 12-3 diversas adaptações no organismo como melhora da capacidade aeróbica (GETMANN e POLLOCK, 1981), aumento da força e da massa muscular (hipertrofia) (EARP et al, 2015). Além disso, devido ao fato da pratica da musculação demandar de aumento no gasto calórico, é possível a ocorrência de emagrecimento (WEISS et al, 2016).…”

Section: Introductionunclassified

Perfil De Iniciantes Na Prática De Musculação: Há Diferenças Entre Homens E Mulheres

Pedrosa

Bicalho²,

Diniz³

et al. 2017

MUNDI SB

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Resumo: A prática regular de musculação representa um meio eficaz para o desenvolvimento de aspectos que podem melhorar a qualidade de vida das pessoas. Este trabalho tem como objetivo elaborar e comparar o perfil de homens e mulheres que iniciaram a pratica da musculação em uma academia em Belo Horizonte durante o período de um ano. O perfil foi elaborado por meio das informações registradas na avaliação física submetida em cada indivíduo matriculado nesta academia. O número de iniciantes registrados foi de 245 participantes, 150 mulheres e 95 homens. O teste T de Student identificou que a massa corporal e a estatura dos homens foi significativamente maior do que a das mulheres (p < 0,05), porém o % de gordura das mulheres foi maior do que dos homens, embora não tenha sido detectada diferença estatística no índice de massa corporal (p > 0,05). Na comparação entre objetivos, mulheres visam emagrecimento e homens aumento da massa muscular. Por meio dos resultados encontrados neste estudo, conclui-se que mais mulheres iniciam a pratica da musculação do que homens. Além disso, os homens deste estudo objetivam hipertrofia muscular e mulheres perda de gordura.Palavras-chave: Musculação. Emagrecimento. Hipertrofia. Qualidade de vida. Abstract:The regular practice of physical exercises as resistance training is an effective means for the development of aspects that may improve quality of life in men and women. This study aims to develop and compare the profile of men and women who started at the first time the practice of resistance training in a gym in Belo Horizonte during the period of one year. The profile was prepared by using the information recorded in the physical assessment submitted for

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Inhomogeneous Quadriceps Femoris Hypertrophy in Response to Strength and Power Training

Cited by 77 publications

References 37 publications

Single-joint eccentric knee extension training preferentially trains the rectus femoris within the quadriceps muscles

Single-joint eccentric knee extension training preferentially trains the rectus femoris within the quadriceps muscles

Inter‐ and intramuscular differences in training‐induced hypertrophy of the quadriceps femoris: association with muscle activation during the first training session

Perfil De Iniciantes Na Prática De Musculação: Há Diferenças Entre Homens E Mulheres

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