Abstract
This study aimed to analyze the associations between recovery of low-frequency
fatigue, jump height, and perceptual responses following official soccer
matches. Forty-two male youth elite soccer players (age: 17.13±0.70 years;
height: 179.17±5.94 cm; weight: 69.74±4.91 kg) participated in this study.
Low-frequency fatigue, countermovement jump, perceived fatigue, muscle soreness,
and perceived recovery were assessed at − 2 h, +30 min, +24 h and +48 h relative
to the match. Linear mixed models analysis showed that low-frequency fatigue was
reduced at the match-end (ES=− 0.679 [95% CI =− 1.01; − 0.34]; p<0.001) but
returned to baseline after 24 h (ES=0.149 [95% CI = − 0.26; 0.56]; p=1.00).
Perceptual responses were impaired for up to 48 hours following the match
(ES=− 0.868–1.174; p<0.001). Countermovement jump did not differ between any
time point (ES=− 0.204–0.216; p>0.05). Additionally, the within-subject
correlation analysis showed that low-frequency fatigue pre- to post-match
changes presented moderate to large associations with perceived fatigue
(rm[57]=− 0.43; p<0.001), muscle soreness (rm[57]=− 0.52; p<0.001), and
perceived recovery (rm[57]=0.38; p=0.003). The assessment of low-frequency
fatigue could serve as an additional objective measurement for monitoring
post-match fatigue, as findings suggest that young elite soccer players
experience transient reductions following match-play, which are strongly
correlated with subjective markers of recovery.
Keywords
performance - competition - team sports - muscle damage
