ABBREVIATIONS:
OBS	Observer
SAT	Subcutaneous adipose tissue
US	Ultrasound
Parameters and variables:
m	Body mass, in kg
h	Body height (stature) in m
s	Sitting height, in m
BMI	Body mass index: BMI=m/h2, in kgm−2
MI1	Mass index: MI1=0.53·m/(hs), in kgm−2
d	SAT thickness measured by an individual observer at a given site, in mm (this is the average of the distances measured within the region of interest)
D	Sum of SAT-thicknesses measured by an individual observer at all eight sites in a given participant, in mm
δ	measurement deviation of an individual observer from the mean of the three observers at a given site in a given athlete, in mm
δrel	δrel= 100· δ/dMEAN, in [%]
Δ	Deviation of the sum of eight sites measured by an individual observer from the mean of the sums of the three observers in a given athlete, in mm
Δrel	Δrel= 100·Δ/DMEAN, in [%]
EXCL	Excluded; indicates that the fibrous structures embedded in the SAT are not included in the thickness value.
INCL	Included; indicates that the fibrous structures are included
c	speed of sound
Statistics:
N	Number of values
ABS	Absolute value of a number
MEAN	Mean value
SD	Standard deviation
SEE	Standard error of estimate
ICC	Intraclass correlation coefficient
IQR	Interquartile range
R2	Coefficient of determination
ρ	Spearman's rank correlation coefficient (Spearman's rho)
Ultrasound sites:
UA	Upper abdomen
LA	Lower abdomen
ES	Erector spinae
DT	Distal triceps
BR	Brachioradialis
FT	Front thigh
LT	Lateral thigh
MC	Medial calf
EO	External oblique