Variables of morphosport$tab are the following ones: dbi (biacromial diameter (cm)),
tde (height (cm)), tas (distance from the buttocks to the top of the head (cm)),
lms (length of the upper limbs (cm)), poids (weigth (kg)).
The levels of morphosport$sport are: athl (athletics), foot (football),
hand (handball), judo, nata (swimming), voll (volleyball).