NCT04810130

Physiological Effects of Soccer Heading

Effect of Repetitive Soccer Heading on Biomechanics and Physiological Measures

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 27 (actual)
• Sponsor: Children's Hospital of Philadelphia · Academic / Other
• Sex: All
• Age: 13 Years – 18 Years
• Healthy volunteers: Accepted

Summary

There is growing concern for the resulting neurological and physiological outcomes from repeated head impacts in sports that do not manifest into traditional concussion symptoms. Specifically, there is evidence of immediate physiological deficits following controlled soccer heading. This study will compare the physiological changes of adolescents completing a set of soccer headers to those randomized to a set of soccer kicks to evaluate the effect of repetitive head impacts.

Detailed description

There is limited data relating head impact biomechanics to neurological outcomes in humans. Concussion occurs from rotational loading of the head giving rise to diffuse stresses and strains in the brain tissue leading to autonomic and physiological dysfunction. Repeated head loading is common in contact sports and an integral part of soccer. It is unknown whether the same biomechanical forces from lower severity head impacts such as typical soccer heading cause temporary physiological deficits as well. Advancement of objective physiological function assessment devices allow measurement of neurological effects in the absence of diagnosed concussion. Recent soccer heading studies have evaluated neurophysiological changes pre- and post-repetitive heading. These studies have found conflicting results for the effect on neurocognitive performance immediately following a bout of heading, but consistent changes were observed in measures of vestibular balance, ocular function, and neurochemical biomarkers. Soccer heading biomechanics studies showed that females experienced higher severity head loading, and in equivalent sports such as soccer and basketball, females have higher concussion rates. This study will compare the physiological changes of male and female adolescents completing one of two soccer heading paradigms to those randomized to kicking to evaluate the effect of repetitive head impacts. This study will relate biomechanical measures of head loading with physiological function changes associated with repeated head impacts, and compare sex-differences in biomechanical measures and physiological changes.

Conditions

• Repeated Head Impacts

Interventions

Type	Name	Description
OTHER	Soccer Kicking	Subjects assigned to the soccer kicking arm will complete 10 soccer kicks in 10 minutes.
OTHER	Soccer Heading (Frontal)	Subjects assigned to the soccer heading (frontal) arm will complete 10 frontal soccer headers (ball headed directly back to launch direction) in 10 minutes. Soccer balls will be projected at 10-17.5 m/s from approximately 10-15 m with a JUGS ball launcher.
OTHER	Soccer Heading (Oblique)	Subjects assigned to the soccer heading (oblique) arm will complete 10 oblique soccer headers (ball headed 90° to the right from ball launch direction) in 10 minutes. Soccer balls will be projected at 10-17.5 m/s from approximately 10-15 m with a JUGS ball launcher.

Timeline

• Start date: 2020-12-15
• Primary completion: 2021-12-18
• Completion: 2021-12-19
• First posted: 2021-03-22
• Last updated: 2022-11-10

Locations

1 site across 1 country: United States