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The effect of short-term interval training during the competitive season on physical fitness and signs of fatigue: a crossover trial in high-level youth football players.

TitelThe effect of short-term interval training during the competitive season on physical fitness and signs of fatigue: a crossover trial in high-level youth football players.
MedientypJournal Article
Year of Publication2014
AutorenFaude O, Steffen A, Kellmann M, Meyer T
JournalInt J Sports Physiol Perform
Volume9
Ausgabe6
Seitennummerierung936-44
Date Published2014 Nov
ISSN1555-0265
SchlüsselwörterAdolescent, Anaerobic Threshold, Competitive Behavior, Creatine Kinase, Cross-Over Studies, Fatigue, Heart Rate, Humans, Male, Physical Education and Training, Physical Endurance, Physical Fitness, Soccer, Urea
Zusammenfassung

PURPOSE: To analyze performance and fatigue effects of small-sided games (SSG) vs high-intensity interval training (HIIT) performed during a 4-wk in-season period in high-level youth football.

METHODS: Nineteen players from 4 youth teams (16.5 [SD 0.8] y, 1.79 [0.06] m, 70.7 [5.6] kg) of the 2 highest German divisions completed the study. Teams were randomly assigned to 1 of 2 training sequences (2 endurance sessions per wk): One training group started with SSG, whereas the other group conducted HIIT during the first half of the competitive season. After the winter break, training programs were changed between groups. Before and after the training periods the following tests were completed: the Recovery-Stress Questionnaire for Athletes, creatine kinase and urea concentrations, vertical-jump height (countermovement jump [CMJ], drop jump), straight sprint, agility, and an incremental field test to determine individual anaerobic threshold (IAT).

RESULTS: Significant time effects were observed for IAT (+1.3%, η(p)(2) = .31), peak heart rate (-1.8%, η(p)(2) = .45), and CMJ (-2.3%, η(p)(2) = .27), with no significant interaction between groups (P > .30). Players with low baseline IAT values (+4.3%) showed greater improvements than those with high initial values (± 0.0%). A significant decrease was found for total recovery (-5.0%, η(p)(2) = .29), and an increase was found for urea concentration (+9.2%, η(p)(2) = .44).

CONCLUSION: Four weeks of in-season endurance training can lead to relevant improvements in endurance capacity. The decreases in CMJ height and total-recovery score together with the increase in urea concentration might be interpreted as early signs of fatigue. Thus, the danger of overtaxing players should be considered.

DOI10.1123/ijspp.2013-0429
Alternate JournalInt J Sports Physiol Perform
PubMed ID24622685
Nicht definiert