Figen DAĞ, UĞUR DAL, ZEYNEP ALTINKAYA, Ayhan Taner ERDOĞAN, Emre ÖZDEMİR, DİDEM DERİCİ YILDIRIM, MEHMET ÇOLAK

lterations in energy consumption and plantar pressure distribution during walking in young adults with patellofemoral pain syndrome

Objective: The aim of this study was to determine the alterations of walking energy expenditure and plantar pressure distribution in young adults with patellofemoral pain syndrome (PFPS). Methods: Thirty ﬁve individuals (mean age: 21.31 ± 1.76) with PFPS constituted the patient group and forty healthy participants (mean age: 21.40 ± 2.11) the control group. Preferred walking speeds (PWS) were determined on the over ground. Individuals walked on a treadmill for 7 min at their PWS and 30% above PWS and oxygen consumption was recorded via a metabolic analyzer. Net oxygen consumption was calculated for each walking trial. Borg scale was applied to assess perceived exertion during walking trial. Plantar pressure distributions were measured by a pedobarography device. Plantar area was subdivided into six zones to evaluate the dynamic plantar pressure data. Results: The mean PWS of PFPS and control groups were 4.69 ± 0.51 and 4.52 ± 0.60 km/h, respectively (p > .09). Nosigniﬁcant differencewas observedin energyexpenditureduringwalking atPWSbetween2 groups while oxygen consumption during 30% above PWS was higher in patient group (18.72 ± 3.75 and 16.64 ± 3.27)(p¼.007).Netoxygen consumptionwas also found tobe higher in PFPS group (15.12 ± 3.62 and 13.04 ± 3.24) (p ¼ .005). The mean Borg scores were signiﬁcantly higher in PFPS group at each walking trials (p < .001). No statistically signiﬁcant difference was found betweenweight distribution (%) of symptomatic and nonsymptomatic extremity (50.45 ± 3.92% and 49.56 ± 3.93%, respectively) (p¼.509). Dynamic pedobarography parameters were not different between 2 groups, and also between symptomatic and nonsymptomatic extremities (p > .05). Conclusion: Although, rate of perceived exertion and energy expenditure during walking at 30% above PWS are affected negatively in young adults with PFPS, we may speculate that energy consumption and plantar pressure distribution can be compensated by a physiologic adaptation mechanism during walking at PWS

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