An examination of changes in skeletal muscle thickness, echo intensity, strength and soreness following resistance exercise

2020 ◽  
Vol 40 (4) ◽  
pp. 238-244 ◽  
Author(s):  
Noam Yitzchaki ◽  
Wenyuan G. Zhu ◽  
Tayla E. Kuehne ◽  
Ecaterina Vasenina ◽  
Scott J. Dankel ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Resistance Exercise ◽  
Muscle Thickness ◽  
Echo Intensity

scholarly journals Acute effect of multiple sets of fatiguing resistance exercise on muscle thickness, echo intensity, and extracellular-to-intracellular water ratio

2020 ◽  
Vol 45 (2) ◽  
pp. 213-219 ◽  
Author(s):  
Masashi Taniguchi ◽  
Yosuke Yamada ◽  
Noriaki Ichihashi
Keyword(s):  
Resistance Exercise ◽  
Muscle Thickness ◽  
Bioelectrical Impedance ◽  
Acute Effect ◽  
Knee Extension ◽  
Muscle Size ◽  
Echo Intensity ◽  
Tissue Water ◽  
Young Males ◽  
Acute Increase

Resistance exercise (RE) causes an acute increase of the muscle thickness (MT) considered to relate to an increase in tissue water content. Segmental bioelectrical impedance spectroscopy (S-BIS) is a tool used to noninvasively assess intra- and extra-cellular water (ICW and ECW, respectively) of a given limb segment. The purpose of the present study was to examine the change of MT, ultrasound echo intensity (EI), ICW, and ECW after 3 sets of exhaustive RE. Eighteen untrained young males (age, 25.4 ± 4.1 years) performed RE consisting of 3 sets of knee extension concentric and eccentric contractions with 80% of 1-repetition maximum to failure. The MT and EI of the quadriceps measured by ultrasonography, and ECW/ICW ratio of the thigh assessed by S-BIS before (baseline) and after each set of RE (PostEx1, 2, and 3). The changes (Δ) in MT, EI, and ECW/ICW ratio were calculated as values of PostEx minus baseline values. The values of MT, EI, and ECW/ICW ratio at PostEx3 were significantly higher than baseline (effect size: MT, 1.11; EI, 0.47; and ECW/ICW ratio, 0.45). In addition, ΔMT was significantly and moderately correlated with ΔECW/ICW ratio (r = 0.61). Integrated data showed weak but significant correlation between ΔEI and ΔECW/ICW ratio as well (r = 0.31). The present results suggest multiple sets of exhaustive knee extension RE induce the acute increase of EI and ECW/ICW ratio as well as MT. The acute increase of muscle size after exercise can be at least partly explained by relative ECW increase.

scholarly journals Association between hand muscle thickness and whole-body skeletal muscle mass in healthy adults: a pilot study

2017 ◽  
Vol 29 (9) ◽  
pp. 1644-1648 ◽  
Author(s):  
Akio Morimoto ◽  
Tadashi Suga ◽  
Nobuaki Tottori ◽  
Michio Wachi ◽  
Jun Misaki ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Pilot Study ◽  
Muscle Mass ◽  
Skeletal Muscle Mass ◽  
Muscle Thickness ◽  
Healthy Adults ◽  
Whole Body ◽  
Hand Muscle
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