The Role of the Midfoot in Drop Landings

NewsBot · Feb 23, 2018

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The Role of the Midfoot in Drop Landings
Mark Taylor Olsen
Thesis; Brigham Young University

Purpose: The contribution of the midfoot in landing mechanics is understudied.
Therefore, the main purpose of this study was to quantify midtarsal joint kinematics and kinetics
during a barefoot single-leg landing task. A secondary aim of this study was to explore the
relationship between static foot posture and dynamic midfoot function. Methods: In a crosssectional
study design, 48 females (age = 20.4 ± 1.8 yr, height = 1.6 ± 0.06 m, weight = 57.3 ±
5.5 kg, BMI = 21.6 ± 1.7 kg·m−1
) performed drop landings from a height of 0.4 m onto split
force platforms. Subjects hung from wooden rings and landed on their dominant leg. Midtarsal
joint kinematic and kinetic data were recorded using a motion capture software system in
conjunction with a custom multisegment foot model marker set. Arch height index (AHI) for
both seated and standing conditions was measured using the Arch Height Index Measurement
System (AHIMS). Results: Kinematic data revealed an average sagittal plane midtarsal range of
motion (ROM) of 27 degrees through the landing phase. Kinetic data showed that between 7%
and 22% of the total power absorption during the landing was performed by the midtarsal joint.
Standing AHI was correlated negatively with sagittal plane midtarsal ROM (p = 0.0264) and
positively with midtarsal work (p = 0.0212). Standing midfoot angle (MA) was correlated
positively with sagittal plane midtarsal ROM (p = 0.0005) and negatively with midtarsal work (p
= 0.0250). Conclusion: The midfoot contributes substantially to landing mechanics during a
barefoot single-leg landing task. Static foot posture may be a valuable measurement in predicting
midfoot kinematics and kinetics.
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NewsBot · Aug 24, 2018

The Role of the Midfoot in Drop Landings
Olsen, Mark T.; Bruening, Dustin A.; Wayne Johnson, A.; Ridge, Sarah T.
Medicine & Science in Sports & Exercise: August 23, 2018

Purpose The midfoot is instrumental to foot function; however, quantifying its roles in human movement have been difficult. A forceful dynamic activity like landing may help elucidate the midfoot’s contribution to foot energetics and function. The main purpose of this study was to measure midtarsal joint kinematics and kinetics during a barefoot single-leg landing task. A secondary aim of this study was to explore the relationship between static foot posture and dynamic midfoot function.

Methods In a cross-sectional study design, 48 females (age = 20.4 ± 1.8 yr, BMI = 21.6 ± 1.7 kg·m−1) performed drop landings from a height of 0.4 m onto split force platforms. Subjects hung from wooden rings and landed on their dominant leg. Midtarsal joint kinematic and kinetic data were recorded using a 14 camera optical motion capture system in conjunction with two in-ground force platforms and a custom kinetic 3-segment foot model. Foot structure was measuring using the Arch height index and the static midtarsal joint angle from motion capture.

Results Kinematic data revealed an average sagittal plane midtarsal joint range of motion (ROM) of 27 degrees through the landing phase. Kinetic data showed that between 7% and 22% of the total lower extremity joint work during the landing was performed by the midtarsal joint. Both standing AHI and static midtarsal joint angle (static MA) were correlated with sagittal plane midtarsal joint ROM (standing AHI: r=-0.320, p=0.026; static MA: r=0.483, p<0.001) and with midtarsal joint work (standing AHI: r=0.332, p=0.021; static MA: r=-.323, p=0.025). Conclusion

The midfoot contributes substantially to landing mechanics during a barefoot single-leg landing task. Static foot posture measures have limited value in predicting midfoot kinematics and kinetics during sport-like landings.
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