目标:在足球中,比赛期间的高强度跑步比赛被认为是决定性的。有趣的是,最近的研究表明,足球运动员的峰值脂肪氧化率(PFO)高于其他运动员。这项研究旨在调查PFO在季前赛后是否增加。其次,由于COVID-19,我们调查了PFO是否与半职业男足球运动员亚组的身体表现有关。
方法:在进行8周的季前训练之前和之后,42名亚精英男足球运动员(18名半专业人员和24名非专业人员)进行了双能x光吸收测量扫描,并在跑步机上进行了分级运动测试,以测定PFO,运动强度引起PFO(Fatmax)和峰值摄氧量(VO2峰)。此外,半职业球员在季前训练前后进行了Yo-Yo间歇性恢复测试2级(YYIR2),以确定足球特定的跑步表现。
结果:PFO增加了11±10%(平均±95%CI),p=0.031,V²O2峰增加了5±1%,p<0.001,而Fatmax不变(+12±9%,p=0.057),在赛季前训练之后。PFO增量与V²O2峰(Pearson'sr2=0.00,p=0.948)或无脂肪质量(FFM)(r2=0.00,p=0.969)的增量无关。同时,YYIR2在半职业球员中的表现提高了39±17%,p<0.001,这与VO2峰的变化有关(r2=0.35,p=0.034),但与PFO(r2=0.13,p=0.244)无关。
结论:PFO,V♪O2peak,在亚精英足球运动员的季前训练之后,FFM增加了。然而,在一组半职业球员中,PFO的增量与YYIR2性能的改善无关,也与VO2峰值和FFM的增量无关。
OBJECTIVE: In Football, the high-intensity running bouts during matches are considered decisive. Interestingly, recent studies showed that peak fat oxidation rates (PFO) are higher in football players than other athletes. This study aimed to investigate whether PFO increases following a pre-season. Secondarily, and due to COVID-19, we investigated whether PFO is related to the physical performance in a subgroup of semi-professional male football players.
METHODS: Before and after 8 weeks of pre-season training, 42 sub-elite male football players (18 semi-professionals and 24 non-professionals) had a dual-energy x-ray absorptiometry scan and performed a graded exercise test on a treadmill for the determination of PFO, the exercise intensity eliciting PFO (Fatmax) and peak oxygen uptake (V̇O2peak). Additionally, the semi-professional players performed a Yo-Yo Intermittent Recovery Test level 2 (YYIR2) before and after pre-season training to determine football-specific running performance.
RESULTS: PFO increased by 11 ± 10% (mean ± 95% CI), p = 0.031, and V̇O2peak increased by 5 ± 1%, p < 0.001, whereas Fatmax was unchanged (+12 ± 9%, p = 0.057), following pre-season training. PFO increments were not associated with increments in V̇O2peak (Pearson\'s r2 = 0.00, p = 0.948) or fat-free mass (FFM) (r2 = 0.00, p = 0.969). Concomitantly, YYIR2 performance increased in the semi-professional players by 39 ± 17%, p < 0.001, which was associated with changes in V̇O2peak (r2 = 0.35, p = 0.034) but not PFO (r2 = 0.13, p = 0.244).
CONCLUSIONS: PFO, V̇O2peak, and FFM increased following pre-season training in sub-elite football players. However, in a subgroup of semi-professional players, increments in PFO were not associated with improvements in YYIR2 performance nor with increments in V̇O2peak and FFM.