scholarly journals Muscle thickness correlates to muscle cross-sectional area in the assessment of strength training-induced hypertrophy

2017 ◽  
Vol 28 (3) ◽  
pp. 846-853 ◽  
Author(s):  
M. V. Franchi ◽  
S. Longo ◽  
J. Mallinson ◽  
J. I. Quinlan ◽  
T. Taylor ◽  
...  
Keyword(s):  
Strength Training ◽  
Muscle Thickness ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Muscle Cross Sectional Area

scholarly journals Relationship between Muscle Cross-Sectional Area by MRI and Muscle Thickness by Ultrasonography of the Triceps Surae in the Sitting Position

Healthcare ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 166 ◽  
Author(s):  
Ryo Miyachi ◽  
Toshiaki Yamazaki ◽  
Naoki Ohno ◽  
Tosiaki Miyati
Keyword(s):  
Soleus Muscle ◽  
Young Male ◽  
Muscle Thickness ◽  
Cross Sectional Area ◽  
Triceps Surae ◽  
Neutral Position ◽  
Sitting Position ◽  
Sectional Area ◽  
Cross Sectional ◽  
Muscle Cross Sectional Area

The purpose of this study was to determine the differences in the muscle cross-sectional area (MCSA) of the triceps surae in the supine and sitting positions using magnetic resonance imaging (MRI), and the relationship between the MCSA of the triceps surae in the sitting position and muscle thickness (MT), assessed using MRI and ultrasonography, respectively. This study included 16 healthy young male participants. The measurement positions were 90° flexion of the knee joint and neutral position of the ankle joint in the sitting or supine positions. Using an open-configuration MRI system with a vertical gap and ultrasonography, we measured the MCSA and MT of the soleus muscle and the medial and lateral heads of the gastrocnemius muscle at three selected locations in the ventral part of the muscle. As a result, the 50% portion of the soleus muscle and the 25% and 50% portions of the gastrocnemius medial and lateral heads were higher in the sitting position than in the supine position. Furthermore, only 50% of the gastrocnemius medial head showed a correlation between the MCSA and MT. When using the MT of the triceps surae as an indicator of muscle volume in the sitting position, the muscle site should be considered.

Effects of different strength training frequencies during reduced training period on strength and muscle cross-sectional area

2017 ◽  
Vol 17 (6) ◽  
pp. 665-672 ◽  
Author(s):  
Lucas Duarte Tavares ◽  
Eduardo Oliveira de Souza ◽  
Carlos Ugrinowitsch ◽  
Gilberto Candido Laurentino ◽  
Hamilton Roschel ◽  
...  
Keyword(s):  
Strength Training ◽  
Cross Sectional Area ◽  
Training Period ◽  
Sectional Area ◽  
Cross Sectional ◽  
Muscle Cross Sectional Area

scholarly journals Unilateral strength training leads to muscle-specific sparing effects during opposite homologous limb immobilization

2018 ◽  
Vol 124 (4) ◽  
pp. 866-876 ◽  
Author(s):  
Justin W. Andrushko ◽  
Joel L. Lanovaz ◽  
Kelsey M. Björkman ◽  
Saija A. Kontulainen ◽  
Jonathan P. Farthing
Keyword(s):  
Strength Training ◽  
Muscle Thickness ◽  
Training Group ◽  
Sectional Area ◽  
Cross Sectional ◽  
Multiple Contraction ◽  
Contraction Type ◽  
Muscle Cross Sectional Area ◽  
Wrist Flexors ◽  
Unilateral Strength Training

Cross education (CE) occurs after unilateral training whereby performance of the untrained contralateral limb is enhanced. A few studies have shown that CE can preserve or “spare” strength and size of an opposite immobilized limb, but the specificity (i.e., trained homologous muscle and contraction type) of these effects is unknown. The purpose was to investigate specificity of CE “sparing” effects with immobilization. The nondominant forearm of 16 participants was immobilized with a cast, and participants were randomly assigned to a resistance training (eccentric wrist flexion, 3 times/week) or control group for 4 weeks. Pre- and posttesting involved wrist flexors and extensors eccentric, concentric and isometric maximal voluntary contractions (via dynamometer), muscle thickness (via ultrasound), and forearm muscle cross-sectional area (MCSA; via peripheral quantitative computed tomography). Only the training group showed strength preservation across all contractions in the wrist flexors of the immobilized limb (training: −2.4% vs. control: −21.6%; P = 0.04), and increased wrist flexors strength of the nonimmobilized limb (training: 30.8% vs. control: −7.4%; P = 0.04). Immobilized arm MCSA was preserved for the training group only (training: 1.3% vs. control: −2.3%; P = 0.01). Muscle thickness differed between groups for the immobilized (training: 2.8% vs. control: −3.2%; P = 0.01) and nonimmobilized wrist flexors (training: 7.1% vs. control: −3.7%; P = 0.02). Strength preservation was nonspecific to contraction type ( P = 0.69, [Formula: see text] = 0.03) yet specific to the trained flexors muscle. These findings suggest that eccentric training of the nonimmobilized limb can preserve size of the immobilized contralateral homologous muscle and strength across multiple contraction types.NEW & NOTEWORTHY Unilateral strength training preserves strength, muscle thickness, and muscle cross-sectional area in an opposite immobilized limb. The preservation of size and strength was confined to the trained homologous muscle group. However, strength was preserved across multiple contraction types.

scholarly journals High correlation of temporal muscle thickness with lumbar skeletal muscle cross-sectional area in patients with brain metastases

PLoS ONE ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. e0207849 ◽  
Author(s):  
Johannes Leitner ◽  
Sebastian Pelster ◽  
Veronika Schöpf ◽  
Anna S. Berghoff ◽  
Ramona Woitek ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Brain Metastases ◽  
Muscle Thickness ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Temporal Muscle ◽  
Muscle Cross Sectional Area
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