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, 18 (4), 399-405
eCollection

Muscle and Fat Mapping of the Trunk: A Case Study

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Muscle and Fat Mapping of the Trunk: A Case Study

Samuel L Buckner et al. J Ultrasound.

Abstract

The following case study examines the muscle and fat thickness of the trunk in a 25-year-old, former collegiate gymnast. Previous studies have quantified total and regional skeletal muscle mass using magnetic resonance imaging and muscle volume and distribution using ultrasound. However, to the best of our knowledge, the distribution and symmetry of skeletal muscle and subcutaneous adipose tissue (AT) of the anterior and posterior trunk have never been investigated. Ultrasound was used to identify skeletal muscle and AT thickness of 143 data points on the anterior portion of the trunk and 140 data points on the posterior portion of the trunk. Muscle thickness values in the anterior trunk ranged from 0.5 to 5.6 cm, and muscle thickness of the posterior trunk ranged from 0.6 to 6.6 cm. Total muscle volume of the trunk was 2935 and 4195 cm(3) for the anterior and posterior portions, respectively. The total predicted muscle mass in the anterior and posterior trunk was 7.4 kg. This case study begins to provide a picture of the distribution and symmetry of skeletal muscle and AT of the trunk. Future studies are necessary to confirm these findings and examine relationships among different populations.

Keywords: Gymnastics; Hypertrophy; Ultrasound; Volume.

Figures

Fig. 1
Fig. 1
Displays the beginning (a) and end (b) of the eccentric phase of a handstand pushup and the execution of a planche exercise (c)
Fig. 2
Fig. 2
The beginning (a) and end (b) of the eccentric portion of a 90° pushup. This skill is performed from start to finish with only the hands touching the ground. On full repetition includes: lowering from handstand (a) to the parallel position (b) and back up to a handstand (a)
Fig. 3
Fig. 3
Muscle thickness values across the anterior (a) and posterior (b) trunk. Dots represent center of site for ultrasound measurement and line indicates division of upper from lower quadrants
Fig. 4
Fig. 4
Anterior muscle thickness (a), anterior adipose tissue thickness (b), posterior muscle thickness (c) and posterior adipose tissue thickness (d) are displayed using a color gradient. Legend indicates color and corresponding thickness (mm)
Fig. 5
Fig. 5
a Anterior muscle thickness (mm), and b posterior muscle thickness (mm) are displayed. The x-axis represents 3 cm averages starting at the most superior point of the trunk (1) and ending at the most inferior point (13)

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