Purpose: The major purpose of the present study was to examine whether
there exists a relationship between preseasonal physiological tests a
nd performance results in the soccer league. Further, it investigated
maximal oxygen uptake and maximal strength in proportion to body mass
for soccer players. A secondary aim was to establish some normative da
ta of Norwegian elite soccer players. Methods: Two teams from the Norw
egian elite soccer league participated in the study. Results/Conclusio
n: The present study supports previous investigations indicating a pos
itive relationship between maximal aerobic capacity, physical strength
, and performance results in the elite soccer league. It is concluded
that for soccer players, maximal oxygen uptake should be expressed in
relation to body mass raised to the power of 0.75 and maximal strength
in relation to body mass raised to the power of 0.67, when the aim is
to evaluate maximal aerobic capacity when running and strength capaci
ty among players with different body mass. Midfield players had signif
icantly higher maximal oxygen uptake compared with defense players usi
ng the traditional expression, mL.kg(-1).min(-1), while no significant
differences were found expressing maximal oxygen uptake either absolu
tely (L.min(-1)) or in relation to body mass raised to the power of 0.
75 (mL.kg(-0.75).min(-1)) among players grouped by position. There was
a significant correlation (r = 0.61, P < 0.01) between squat 1RM and
vertical jump height. Vertical jump heights for defense and forward pl
ayers were significantly higher compared with midfield players. Mean r
esults from the laboratory test were 63.7 mL.kg(-1).min(-1) or 188.6 m
L.kg(-0.75).min(-1) for maximal oxygen uptake, 150 kg or 8.0 kg.m(b)(-
0.67) for 90 degrees squats, 79.9 kg or 4.4 kg.m(b)(-0.67) for bench p
ress. Mean values of vertical jump height were 54.9 cm.