Rectus Femoris Echo Intensity Correlates with Muscle Strength, but Not Endurance, in Younger and Older Men

Mota, Jacob A.; Stock, Matt S.

doi:10.1016/j.ultrasmedbio.2017.04.010

Cited by 55 publications

(57 citation statements)

References 31 publications

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“…Briefly, images were acquired with a multifrequency linear-array probe (ML6-15 L; 5-13 MHz; 50mm field of view; General Electric Company, Milwaukee, WI) using the LogicVIEW function. Three images for each muscle were captured at 1/3 the distance from the tibial articular cleft between the femur and tibia condyle to the lateral malleolus on the dominant leg [29]. The polygon function in ImageJ software (version 1.46r, National Institutes of Health, Bethesda, Md.)…”

Section: Ultrasonographymentioning

confidence: 99%

Early and late rapid torque characteristics and select physiological correlates in middle-aged and older males

Olmos

Stratton

et al. 2020

PLoS ONE

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The purpose of this study was to compare early and late rapid torque parameters of the plantar flexors (PFs) in middle-aged (MM) and older (OM) males, and determine the effect of normalization to peak torque (PT) and muscle cross-sectional area (CSA). Methods Twenty-nine healthy, MM (n = 14; 45 ± 2 yrs) and OM (n = 15; 65 ± 3 yrs) performed rapid, maximal isometric contractions of the PFs. PT, as well as rate of torque development and impulse during the early (0-50 ms; RTD 0-50 , IMP 0-50) and late (100-200 ms; RTD 100-200 , IMP 100-200) contraction phases were calculated. Torque at 50 (TQ 50), 100 (TQ 100), and 200 (TQ 200) ms was also obtained. CSA and echo-intensity (EI) of the gastrocnemii were acquired via ultrasonography. Torque variables were normalized to PT and CSA. Rate of EMG rise (RER) for the medial gastrocnemius was calculated at 30, 50 and 75 ms.

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Section: Ultrasonographymentioning

confidence: 99%

Early and late rapid torque characteristics and select physiological correlates in middle-aged and older males

Olmos

Stratton

et al. 2020

PLoS ONE

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“…Though its image quality still lags behind CT and MRI, its portability, cost, time efficiency and ease of use make it an attractive alternative for the assessment of skeletal muscle. Studies have demonstrated that echo intensity of the quadriceps femoris muscles correlates with lower extremity strength (Mota & Stock, 2017), chair stand ability (Lopez et al, 2017) and the rate of force development (Rech et al, 2014). Similar ultrasound-based techniques have long been used in agricultural sciences to evaluate marbling and meat quality in cattle (Hassen et al, 2001) and swine (Newcom et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Anatomical investigations carried out in humans and animals have demonstrated that echo intensity strongly reflects fibrous tissue content (Pillen et al, 2009;Arts et al, 2012), as well as intramuscular adiposity (Reimers et al, 1993;Young et al, 2015). Studies have demonstrated that echo intensity of the quadriceps femoris muscles correlates with lower extremity strength (Mota & Stock, 2017), chair stand ability (Lopez et al, 2017) and the rate of force development (Rech et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Consistency of novel ultrasound equations for estimating percent intramuscular fat

Burton

Stock

2018

Clin Physio Funct Imaging

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“…16,23 Measurements of EI provide an indication of noncontractile tissues within a muscle, such as intramuscular fat infiltration and connective tissue 16 ; a higher EI represents greater intramuscular fat content. Higher quadriceps EI is associated with lower muscle strength in adult males without ACLR 21 and predicts mobility limitations in the elderly. 17 However, quadriceps ultrasonography (ie, CSA and EI) has not been used to evaluate quadriceps function in individuals with ACLR.…”

mentioning

confidence: 96%

“…Conversely, ultrasonography provides a cost-effective and portable method that has high test-retest reliability for measuring skeletal muscle size and echo intensity (EI). 21,22 Recent advances in ultrasound technology provide panoramic imaging capabilities, permitting visualization of the entire cross-sectional area (CSA) of larger muscles (eg, vastus lateralis [VL]). Additionally, intramuscular fat can be estimated using EI, which is the average grayscale of all pixels within the CSA of a muscle.…”

mentioning

confidence: 99%

Quadriceps Muscle Size, Quality, and Strength and Self-Reported Function in Individuals With Anterior Cruciate Ligament Reconstruction

Garcia

Moffit

Vakula

et al. 2020

Journal of Athletic Training

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Context Ultrasound imaging provides a cost-effective method of measuring quadriceps morphology, which may be related to self-reported function after anterior cruciate ligament reconstruction (ACLR). Objective To compare quadriceps morphology and strength between limbs in individuals with ACLR and matched control limbs and determine their associations with self-reported function. Design Cross-sectional study. Setting Research laboratory. Patients or Other Participants Forty-two individuals with ACLR (females = 66%; age = 21.8 ± 2.6 years; time since ACLR = 50.5 ± 29.4 months) and 37 controls (females = 73%; age = 21.7 ± 1.2 years). Main Outcome Measure(s) Quadriceps peak torque (PT) and rate of torque development were assessed bilaterally. Ultrasonography was used to measure the cross-sectional area (CSA) and echo intensity (EI) of the rectus femoris, vastus lateralis (VL), and vastus medialis. Self-reported function was assessed via the International Knee Documentation Committee (IKDC) score and Knee Injury and Osteoarthritis Outcome Score (KOOS) subscales. Paired-samples t tests were calculated to compare involved and uninvolved limbs. Independent t tests were conducted to compare groups (α = .05). Linear regression was performed to analyze associations between quadriceps function and self-reported function after accounting for time since ACLR, activity level, and sex, and models for EI added subcutaneous fat as a covariate. Results Isometric PT did not differ between limbs or groups. Involved limbs had a lower rate of torque development compared with the control (P = .01) but not the uninvolved limbs (P = .08). Vastus lateralis CSA was smaller in the involved than in the uninvolved (P < .01) but not the control limbs (P = .10). Larger VL CSA (ΔR2 = 0.103) and lower VL EI (ΔR2 = 0.076) were associated with a higher IKDC score (P < .05). Larger VL CSA was associated with greater KOOS Symptoms (ΔR2 = 0.09, P = .043) and Sport and Recreation (ΔR2 = 0.125, P = .014) scores. Lower VL EI was associated with higher KOOS Symptoms (ΔR2 = 0.104, P = .03) and Quality of Life (ΔR2 = 0.113, P = .01) scores. Quadriceps PT and rate of torque development were not associated with IKDC or KOOS subscale scores. Conclusions Quadriceps morphology was associated with self-reported function in individuals with ACLR and may provide unique assessments of quadriceps function.

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Rectus Femoris Echo Intensity Correlates with Muscle Strength, but Not Endurance, in Younger and Older Men

Cited by 55 publications

References 31 publications

Early and late rapid torque characteristics and select physiological correlates in middle-aged and older males

Early and late rapid torque characteristics and select physiological correlates in middle-aged and older males

Consistency of novel ultrasound equations for estimating percent intramuscular fat

Quadriceps Muscle Size, Quality, and Strength and Self-Reported Function in Individuals With Anterior Cruciate Ligament Reconstruction

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