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Dataset for Effects of Aging on Patellofemoral Joint Stress During Stair Negotiation on Challenging Surfaces

Boise State ScholarWorks
2024
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Dataset Description

Patellofemoral joint (PFJ) pain is an incessant musculoskeletal disorder underreported in older adults. This study examined the effect of age and surface on the magnitude and waveform of PFJ stress during a stair ascent task. 12 healthy young adults and 12 healthy older adults completed a stair ascent and descent task on a normal, uneven, and slick surface. During stair ascent age impacted PFJ stress waveform (p < 0.001), but not magnitude, as older adults exhibited greater PFJ stress from 55 to 59% and 74 to 84% of stance (p < 0.037). The increase in older adults PFJ stress late in stance may be attributed to a later peak PFJ stress (p = 0.002) and larger PFJ stress-time integral (p = 0.003) than young adults. Surface also impacted PFJ waveform (p < 0.001). On the uneven surface during stair ascent, PFJ stress was smaller from 9 to 24%, but greater from 75 to 88% of stance (both: p < 0.001), and PFJ stress-time integral (p = 0.010) was greater than normal surface. A significant age by surface interaction was observed for time of peak PFJ stress (p = 0.041). On the uneven surface, older adults exhibited a later peak PFJ stress compared to young adults (p = 0.008), and later peak PFJ stress compared to normal and slick surface (both: p = 0.014). For stair descent, age impacted PFJ contact area range (p = 0.034) and peak knee flexion angle (= 0.022), but no other PFJ stress measure. On the uneven surface during stair descent, partipicants exhibited greater PFJ stress-time integral, reaction force impulse, and mean contact area (all: p < 0.05) compared to the slick surface. Surface also impacted PFJ stress waveform during stair descent, where participants exhibited greater stress from 0 to 16% of stance but smaller stress from 98 to 100% of stance on the uneven compared to slick surfaces. Older adults may be more likely to develop PFJ pain, as they exhibited larger and later PFJ stress, particularly when navigating an uneven surface. When navigating the uneven surface, all participants exhibited knee biomechanics, including larger PFJ stress in terminal stance and greater PFJ stress-time integral that may increase overall joint stress and increases risk of developing PFJ pain.

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