Abstract:[Purpose] The purpose of the present study was to analyze the correlations of the
thicknesses of the transversus abdominis muscle (Tra) and the internal obliquus abdominis
muscle (Io) with static lumbar stability (SLS), dynamic lumbar stability (DLS), and
balance. [Subjects] The subjects of the present study were 40 female university students
who had no physical defects or pain. [Methods] The thicknesses of Tra and Io muscles were
measured using an ultrasonic imaging diagnostic unit. SLS and DLS were measured … Show more
“…Although MRIs and CTs are able to scan the entire body and are considered the gold standard for imaging, they are quite expensive to perform and involve extensive measurements. Another modality is ultrasonography, which has been used for the accurate measurement of skeletal muscle size in vivo 3 , 4 , 5 , 6 , 7 , 8 ) . A compact ultrasound system, which can quantify muscle thickness (MTH), requires very little time to perform the measurements and would seem optimal for use in the field.…”
[Purpose] This study aimed 1) to assess whether a prediction model for whole body
skeletal muscle mass that is based on a sedentary population is applicable to young male
athletes, and 2) to develop a new skeletal muscle mass prediction model for young male
athletes. [Subjects and Methods] The skeletal muscle mass of 61 male athletes was measured
using magnetic resonance imaging (MRI) and estimated using a previous prediction model
(Sanada et al., 2006) with B-mode ultrasonography. The prediction model was not suitable
for young male athletes, as a significant difference was observed between the means of the
estimated and MRI-measured skeletal muscle mass. Next, the same subjects were randomly
assigned to a development or validation group, and a new model specifically relevant to
young male athletes was developed based on MRI and ultrasound data obtained from the
development group. [Results] A strong correlation was observed between the skeletal muscle
mass estimated by the new model and the MRI-measured skeletal muscle mass (r=0.96) in the
validation group, without significant difference between their means. No bias was found in
the new model using Bland-Altman analysis (r=−0.25). [Conclusion] These results validate
the new model and suggest that ultrasonography is a reliable method for measuring skeletal
muscle mass in young male athletes.
“…Although MRIs and CTs are able to scan the entire body and are considered the gold standard for imaging, they are quite expensive to perform and involve extensive measurements. Another modality is ultrasonography, which has been used for the accurate measurement of skeletal muscle size in vivo 3 , 4 , 5 , 6 , 7 , 8 ) . A compact ultrasound system, which can quantify muscle thickness (MTH), requires very little time to perform the measurements and would seem optimal for use in the field.…”
[Purpose] This study aimed 1) to assess whether a prediction model for whole body
skeletal muscle mass that is based on a sedentary population is applicable to young male
athletes, and 2) to develop a new skeletal muscle mass prediction model for young male
athletes. [Subjects and Methods] The skeletal muscle mass of 61 male athletes was measured
using magnetic resonance imaging (MRI) and estimated using a previous prediction model
(Sanada et al., 2006) with B-mode ultrasonography. The prediction model was not suitable
for young male athletes, as a significant difference was observed between the means of the
estimated and MRI-measured skeletal muscle mass. Next, the same subjects were randomly
assigned to a development or validation group, and a new model specifically relevant to
young male athletes was developed based on MRI and ultrasound data obtained from the
development group. [Results] A strong correlation was observed between the skeletal muscle
mass estimated by the new model and the MRI-measured skeletal muscle mass (r=0.96) in the
validation group, without significant difference between their means. No bias was found in
the new model using Bland-Altman analysis (r=−0.25). [Conclusion] These results validate
the new model and suggest that ultrasonography is a reliable method for measuring skeletal
muscle mass in young male athletes.
“…2. Abdominal muscle thickness ) 11 , 12 ) . To get the abdominal muscles to contract with the same abdominal muscle strength when abdominal muscle thicknesses were being measured, a pressure biofeedback unit (Chattanooga Group, Australia) was placed below the lower back of the subject and abdominal muscle thicknesses were measured when the pressure gauge was maintained at 40 mmHg when the abdomen was tightened both before and after the experiment.…”
[Purpose] The purpose of this study is to examine the effects of dynamic exercise
utilizing the PNF (proprioceptor neuromuscular facilitation) patterns accompanied by
abdominal drawing-in exercises on abdominal muscle thickness in healthy adults. [Subjects]
The total number of subjects was 30;15 were randomly placed in the training group (TG),
and the remaining 15 made up the control group (CG). [Methods] The subjects in the TG
conducted 3–5 sets of dynamic exercises utilizing the PNF patterns each day, 3 times a
week for 6 weeks. The thickness of the abdominal muscles was measured by ultrasonography.
[Results] When the TG’s abdominal muscle thickness pre-test and post-test were compared in
this study, there was a statistical significance in all of the external obliquus abdominis
(Eo), the internal obliquus abdominis (Io), and the transversus abdominis (Tra).
[Conclusion] Dynamic exercise utilizing the PNF patterns increased the thickness of the
abdominal muscles that are the basis of trunk stabilization.
“…When the external oblique abdominis (EOA), IOA, and TrA were visible in their entirety, the screen was put on hold. The muscle thickness of the IOA and TrA was measured 13 mm away from the meeting point of the IOA and TrA muscles 8 ) ( Fig. 1 Fig.…”
[Purpose] The purpose of this study was to determine the impact of a bridge
exercise with an abdominal drawing-in maneuver (ADIM) performed with different surface
conditions on abdominal muscle thickness. [Subjects] Thirty subjects were randomly divided
into an unstable bridge exercise group (UBE group, n=15) and a stable bridge exercise
group (SBE group, n=15). [Methods] After 6 weeks of performing bridge exercises
accompanied by ADIM, the change in the muscle thicknesses of the transverse abdominis
(TrA) and internal oblique abdominis (IOA) muscles was assessed using ultrasonography.
[Results] After 6 weeks of exercise, the TrA was significantly altered in the SBEG, and
the TrA and IOA were both significantly changed in the UBEG. [Conclusion] When performing
bridge exercises to increase the Tra and the IO muscle thicknesses, exercising on an
unstable surface is recommended.
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