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Physical Activity Measurement in Children Accepting Table Tennis Training
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Peak Loads Associated With High-Impact Physical Activities in Children.

Zach Fassett1, Adam E Jagodinsky1, David Q Thomas1

  • 1Illinois State University.

Pediatric Exercise Science
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Jumping activities generate moderate impact loads in children. The drop jump produced the highest peak ground reaction forces (pGRF), suggesting other jumps may not sufficiently stimulate bone health.

Keywords:
biomechanicshealth promotionkinetics

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Area of Science:

  • Pediatric sports science
  • Biomechanics
  • Bone health research

Background:

  • Impact loading is crucial for enhancing bone strength and mineral density in children.
  • Limited research quantifies impact loads from various high-impact activities in pediatric populations.

Purpose of the Study:

  • To quantify the magnitude of peak ground reaction forces (pGRF) during different jumping activities in children.
  • To compare impact loads across diverse jumping exercises relevant to pediatric bone health.

Main Methods:

  • Eight children (8-12 years) performed five jumping activities: broad jump, countermovement jump, jumping jack, leap jump, and drop jump.
  • Peak ground reaction forces (pGRF) were measured using a force plate during the landing phase and expressed in multiples of body weight (BW).
  • Repeated-measures analysis of variance was used to analyze differences in pGRF between activities.

Main Results:

  • The drop jump generated the highest pGRF (3.09 BW), significantly exceeding other activities.
  • Jumping jack (2.56 BW), countermovement jump (2.45 BW), broad jump (2.25 BW), and leap jump (2.01 BW) showed progressively lower pGRF.
  • All tested jumps produced peak loads between 2 and 3.1 BW.

Conclusions:

  • Most tested jumping activities, except the drop jump, generated peak impact loads below 3 BW.
  • These findings suggest that common jumping activities may not provide sufficient mechanical loading to optimize bone health outcomes in children.
  • Further research into higher-impact activities or modified jump techniques may be needed to enhance pediatric bone development.