Time of Day Effects on Power in Young Volleyball Players
Author Information
Author(s): Trajković Nebojša, Milić Vladan, Đurković Tomislav, Rešetar Tomica, Korobeynikov Georgiy
Primary Institution: Faculty of Sport and Physical Education, University of Niš, Serbia
Hypothesis
Both lower and upper body strength would be better in the evening compared to morning.
Conclusion
Lower body power was significantly better in the evening, while upper body performance showed minimal time-of-day effects.
Supporting Evidence
- Vertical jump performance was significantly better in the evening compared to the morning.
- Significant differences were observed in the standing medicine ball throw between morning and evening performances.
- Body temperature and hormonal levels peak later in the day, enhancing performance.
Takeaway
Young volleyball players jump higher in the evening than in the morning, but their upper body strength doesn't change much throughout the day.
Methodology
Participants were tested for vertical jump and medicine ball throws in the morning and evening.
Potential Biases
Variability in testing conditions could affect results.
Limitations
Individual circadian preferences and sleep patterns were not controlled, and the sample was limited to male adolescents.
Participant Demographics
50 male volleyball players aged 14.5 ± 0.5 years.
Statistical Information
P-Value
p < 0.05
Confidence Interval
0.01 to 0.72
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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