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Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Related Experiment Video

Updated: May 28, 2025

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running
08:26

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

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Quantifying Quadriceps Forces during Running Performed with and without Infrapatellar Straps.

Xueying Zhang1, Weiyan Ren2, Xingyue Wang1

  • 1Key Laboratory of Human Motion Analysis and Rehabilitation Technology of the Ministry of Civil Affairs, Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

Journal of Human Kinetics
|February 13, 2025
PubMed
Summary

Infrapatellar straps reduce quadriceps forces during running, potentially preventing knee injuries. They lower vastus lateralis forces but may not impact rectus femoris significantly.

Keywords:
accumulated forceinverse dynamic simulationrunning-related knee injury

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Area of Science:

  • Biomechanics
  • Sports Medicine
  • Orthopedics

Background:

  • Running-related knee injuries often stem from repetitive quadriceps contractions.
  • Infrapatellar straps are frequently suggested for injury prevention and management.
  • Previous studies focused on quadriceps activation, not direct force quantification.

Purpose of the Study:

  • To quantify the impact of infrapatellar straps on quadriceps forces during running.
  • To compare quadriceps forces with and without infrapatellar strap use.
  • To identify which quadriceps muscles are most affected by infrapatellar straps.

Main Methods:

  • Utilized OpenSim software for musculoskeletal modeling and force estimation.
  • Collected motion capture and force plate data from 18 healthy runners.
  • Analyzed quadriceps forces, muscle activity, and joint kinetics during running with and without straps.

Main Results:

  • Infrapatellar straps significantly decreased peak quadriceps forces (p < 0.001) and accumulated forces (p < 0.001).
  • Peak knee extension moments were also significantly reduced (p < 0.001).
  • The vastus lateralis showed the greatest reduction in force; rectus femoris forces remained largely unchanged (p > 0.05).

Conclusions:

  • Infrapatellar straps effectively lower vastus muscle forces, aiding in the management and prevention of running-related knee injuries.
  • These straps may offer limited benefits for individuals with a highly forceful rectus femoris.
  • Further research could explore personalized strap application based on individual muscle force profiles.