How Ankle ROM Affects the Knee and Hip

What’s This Research About?

This study examines the relationship between ankle dorsiflexioin (DF) and Range of Motion (ROM) on hip and knee kinematics during a lateral (sideways) step-down task. In other words, how does the ankle affect the hip? Stepping down is considered a functional task; very few studies have looked at whether ankle DF is linked to hip kinematics during a lateral movement. In addition, most studies examine lower limb kinematics during two-legged movements. Single leg movements may require more frontal and transverse plane control.

About The Author

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Jenn Pilotti

TITLE: The association of ankle dorsiflexion range of motion with hip and knee kinematics during the lateral step down test

ORIGINAL LINK

PUBLICATION: Journal of Orthopedic Sports and Physical Therapy 

DATE: September 2016

AUTHORS : A Rabin, S. Portnoy, and Z. Kozol

Dynamic lower extremity valgus: (occurs when the lower extremity moves medially) is believed to increase ligamentous, tendinous, articular strain. This may lead to pain and injury to the tissue.

Limited ankle dorsiflexion (DF): may contribute to increased frontal knee and/or hip displacement. Limited ankle DF has been linked to decreased knee flexion, increased knee valgus, increased medial collapse of the lower extremity, and higher ground reaction forces during functional tasks. It’s also been linked to ACL tear, patellofemoral pain, and patellar tendinopathy

ROM: range of motion.

Knee valgus: characterized by hip adduction and internal rotation (think knees going inwards, or knock kneed during landing or squatting)

WB: weight bearing

LSD: lateral step down, a test commonly used in clinical setting to assess movement quality.

Kinematics: the science of motion; in human movement, it is more specifically the study of joint positions, angles, and acceleration during movement.

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By |2017-11-27T21:13:51+00:00May 20th, 2017|Musculoskeletal|0 Comments

About the Author:

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Jenn Pilotti has a BS in exercise physiology from UC Davis. After graduating in 2002, she was hired by the Beach and Tennis Club at Pebble Beach as a full time personal trainer. While there, she had the privilege of working with individuals of all ages, many of whom had aches and pains from a life well led. This piqued her interest in injuries, prevention, and pain. After years of undirected self study (and after leaving the security of a full time position to go out on her own), she enrolled in an online program through AT Still University, eventually acquiring a master's in human movement while working full time. After graduating, she continued to read research and write about its application to her work with clients. She fell in love with yoga in 2004, finally became 200 hour RYT in 2014 after years of workshops and self study (there seems to a theme), and continues to study somatic disciplines. She is DNS exercise trainer certified, FRCms, MovNat level I certified, GMB trainer certified, has taken PRI respiration, myokinematics, impingement and instability, and pelvis restoration, and has read an embarrassing number of books on movement, psychology, and wellness. She has an insatiable curiosity about what makes for a healthy person, physically and mentally, and she finds herself often asking why things work for some and not for others. She strongly believes in the power of knowledge and the power of movement. Learn more about Jenn Pilotti.