Estimation of body fat in adults using a portable A-mode ultrasound

Bielemann, Renata Moraes; González, Marı́a Cristina; Barbosa-Silva, Thiago G; Orlandi, Silvana Paiva; Xavier, Mariana Otero; Bergmann, Rafaela Bülow; Assunção, Maria Cecília Formoso

doi:10.1016/j.nut.2015.10.009

Cited by 34 publications

(27 citation statements)

References 20 publications

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“…The gastrocnemius was selected for investigation because it is recruited during running and cycling (Zehr et al, 2007 ), it is therefore likely to undergo adaptations with training. NIRS measurements from this site have been shown to be reproducible (Southern et al, 2014 ) and since the calf is covered by less adipose tissue than the thigh or larger locomotive muscles (Bielemann et al, 2016 ) the influence of ATT on NIRS measurements is less (van Beekvelt et al, 2001 ). Prior to attaching the NIRS device, ATT was measured at the site of NIRS measurement using B-mode ultrasound (Vivid I, GE healthcare) equipped with a 12L-RS linear array transducer; three measurements were averaged.…”

Section: Methodsmentioning

confidence: 99%

Improved Exercise-Related Skeletal Muscle Oxygen Consumption Following Uptake of Endurance Training Measured Using Near-Infrared Spectroscopy

et al. 2017

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Skeletal muscle metabolic function is known to respond positively to exercise interventions. Developing non-invasive techniques that quantify metabolic adaptations and identifying interventions that impart successful response are ongoing challenges for research. Healthy non-athletic adults (18–35 years old) were enrolled in a study investigating physiological adaptations to a minimum of 16 weeks endurance training prior to undertaking their first marathon. Before beginning training, participants underwent measurements of skeletal muscle oxygen consumption using near-infrared spectroscopy (NIRS) at rest (resting muscletrueV˙O2) and immediately following a maximal exercise test (post-exercise muscletrueV˙O2). Exercise-related increase in muscletrueV˙O2 (ΔmtrueV˙O2) was derived from these measurements and cardio-pulmonary peaktrueV˙O2 measured by analysis of expired gases. All measurements were repeated within 3 weeks of participants completing following the marathon and marathon completion time recorded. MuscletrueV˙O2 was positively correlated with cardio-pulmonary peaktrueV˙O2 (r = 0.63, p < 0.001). MuscletrueV˙O2 increased at follow-up (48% increase; p = 0.004) despite no change in cardio-pulmonary peaktrueV˙O2 (0% change; p = 0.97). Faster marathon completion time correlated with higher cardio-pulmonary peaktrueV˙O2 (rpartial = −0.58, p = 0.002) but not muscletrueV˙O2 (rpartial = 0.16, p = 0.44) after adjustment for age and sex [and adipose tissue thickness (ATT) for muscletrueV˙O2 measurements]. Skeletal muscle metabolic adaptions occur following training and completion of a first-time marathon; these can be identified non-invasively using NIRS. Although the cardio-pulmonary system is limiting for running performance, skeletal muscle changes can be detected despite minimal improvement in cardio-pulmonary function.

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Section: Methodsmentioning

confidence: 99%

Improved Exercise-Related Skeletal Muscle Oxygen Consumption Following Uptake of Endurance Training Measured Using Near-Infrared Spectroscopy

et al. 2017

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“…For instance, one study found that whole-body fat content in men could be predicted using information on thigh circumference, triceps and thigh skinfold thickness, biceps muscle thickness, weight, and height. [3] This is done using “multiple linear regression.” We will not discuss this more complex form of regression.…”

mentioning

confidence: 99%

Common pitfalls in statistical analysis: Linear regression analysis

2017

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“…This discrepancy might result from the different gender used in the previous studies compared to our study. Previous studies have demonstrated that there was great variability in subcutaneous fat among women compared with men [29,30]. All subjects in the present study were men, while the previous studies had included both men and women (healthy subjects or patients) [27,28].…”

Section: Upper-leg 50% Girth Measurementmentioning

confidence: 84%

Field-based Simplified Approach of Evaluating Knee Extensor Muscle Strength and Size in Male University Freshmen

Yasuda¹,

Ichikawa²

2016

JSS

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Abstract:The purpose of this study was to examine the relationship between field-based simplified approaches and knee extensor muscle strength/size in young men. Knee extensor muscle thickness (MT) of 104 healthy university freshmen was measured at the anterior half of thigh length; maximal voluntary isometric contraction (MVIC) was measured when subjects performed knee extension. Field-based simplified approaches [sit-to-stand, standing long jump (SLJ), handgrip and upper-leg-50% (thigh) girth] were also measured. MVIC was correlated with SLJ (r = 0.361, P < 0.001), handgrip (r = 0.523, P < 0.001) and thigh girth (r = 0.401, P < 0.001), but not with the sit-to-stand test (r = 0.126, P > 0.05). MT was correlated with handgrip (r = 0.317, P < 0.001) and thigh girth (r = 0.632, P < 0.001), but not with SLJ (r = 0.038, P > 0.05) or the sit-to-stand test (r = 0.145, P > 0.05). A stepwise multiple-regression analysis was applied to the predictor thigh girth to predict knee extensor MT (R 2 = 0.399). To predict knee extensor MVIC, the predictor handgrip, thigh girth and SLJ were applied (R 2 = 0.381). In conclusion, knee extensor muscle strength/size could be evaluated by the field-based simplified approaches, in particular by the thigh girth measurement, which may be major determinant to maintain activities of daily living for healthy young men. However, the 4 field-based simplified approaches appear to be still not of high impact.

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Estimation of body fat in adults using a portable A-mode ultrasound

Cited by 34 publications

References 20 publications

Improved Exercise-Related Skeletal Muscle Oxygen Consumption Following Uptake of Endurance Training Measured Using Near-Infrared Spectroscopy

Improved Exercise-Related Skeletal Muscle Oxygen Consumption Following Uptake of Endurance Training Measured Using Near-Infrared Spectroscopy

Common pitfalls in statistical analysis: Linear regression analysis

Field-based Simplified Approach of Evaluating Knee Extensor Muscle Strength and Size in Male University Freshmen

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