Publications by authors named "Halvard Grendstad"
Biological maturity significantly impacts youth athletes' physical performance throughout adolescence. However, how this differs between male and female youth athletes remains unclear. Thus, the present study aimed to assess associations between maturity, physical performance and motor coordination in females and males.
View Article and Find Full Text PDFPurpose: Maximal oxygen uptake (V̇O ) increases during adolescence parallel to the increase in fat-free mass (FFM). How much endurance training adds to this effect is still controversial. Our aim was to investigate if inclusion of high-intensity training (HIT) during an 8-week training period was superior to low-intensity strength and coordination training in 12-year-old youth athletes concerning the effect on V̇O .
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- - The study investigates the relative age effect (RAE) in Norwegian track and field athletes, focusing on how being born early in the year can influence performance in sports, specifically sprinting versus middle-distance running.
- - Analysis of data from nearly 29,000 athletes revealed that older competitors within the same age group tend to perform better, with a notably higher advantage observed in males for 60m sprints compared to middle-distance events.
- - The findings suggest that athletes born in the first quarter of the year have significantly better odds of ranking in the top-100, with males showing a stronger advantage that appears to diminish with increasing age, especially in middle-distance running.
Introduction: Biological maturity level has shown to affect sport performance in youths. However, most previous studies have used noninvasive methods to estimate maturity level. Thus, the main aim of the present study was to investigate the association between skeletal age (SA) as a measure of biological maturation level, match locomotion, and physical capacity in male youth soccer players.
View Article and Find Full Text PDFThis study aimed to investigate match running performance in U14 male soccer players in Norway, and the influence of position, competitive level and contextual factors on running performance. Locomotion was monitored in 64 different U14 players during 23 official matches. Matches were played at two different competitive levels: U14 elite level ( = 7) and U14 sub-elite level ( = 16).
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- The study analyzes the running performance of soccer players across three competitive levels in Norwegian football, comparing professional and amateur teams.
- It utilizes a tracking system to measure performance in terms of sprinting, high-speed running, and overall running distances during matches.
- Results indicate that higher competitive standards lead to more high-intensity actions, particularly for specific positions like central defenders and attackers when promoted to a higher league.
The main aim of the present study was to compare skeletal maturity level and physical capacities between male Norwegian soccer players playing at elite, sub-elite and non-elite level. Secondary, we aimed to investigate the association between skeletal maturity level and physical capacities. One hundred and two U14 soccer players (12.
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