TY - JOUR T1 - The Investigation of the Correlation between Navicular Drop Degree and Static Balance, Flexibility and Strength TT - The Investigation of the Correlation between Navicular Drop Degree and Static Balance, Flexibility and Strength AU - Altuntas Yılmaz, Neslihan AU - Çiçek, Beyza AU - Venç, Kerime Şevval AU - Kılınç Duran, Derya PY - 2025 DA - November Y2 - 2025 DO - 10.19127/bshealthscience.1740052 JF - Black Sea Journal of Health Science JO - BSJ Health Sci. PB - Karyay Karadeniz Yayımcılık Ve Organizasyon Ticaret Limited Şirketi WT - DergiPark SN - 2619-9041 SP - 255 EP - 262 VL - 8 IS - 6 LA - en AB - The biomechanics of the human body is influenced by muscle strength and flexibility. Deformities in the foot arch can affect balance. Therefore, this study aimed to investigate the relationship between foot arch height and lower extremity muscle strength, flexibility, and static balance. The study included 80 individuals (56 females, 24 males) aged between 18 and 30 years. Navicular drop was assessed using the Navicular Drop Test. Static balance was evaluated with the single-leg stance test. Hip flexor and gastrocnemius flexibility were measured, and muscle strength was assessed using a hand-held dynamometer. Pes planus was observed in 27 left feet (25 moderate pronation, 2 severe pronation) and 23 right feet (20 moderate pronation, 3 severe pronation). Statistical analysis revealed no significant relationship between navicular drop degree and lower extremity muscle strength, flexibility, or static balance (P>0.05). A strong correlation was found between right and left navicular drop values (p < 0.05). No significant association was found between hip flexor flexibility and strength, balance, or navicular drop (P>0.05). However, a positive correlation was identified between dorsiflexor muscle strength and static balance (P KW - Flexibility KW - Navicular drop KW - Strength KW - Static balance N2 - The biomechanics of the human body is influenced by muscle strength and flexibility. Deformities in the foot arch can affect balance. Therefore, this study aimed to investigate the relationship between foot arch height and lower extremity muscle strength, flexibility, and static balance. The study included 80 individuals (56 females, 24 males) aged between 18 and 30 years. Navicular drop was assessed using the Navicular Drop Test. Static balance was evaluated with the single-leg stance test. Hip flexor and gastrocnemius flexibility were measured, and muscle strength was assessed using a hand-held dynamometer. Pes planus was observed in 27 left feet (25 moderate pronation, 2 severe pronation) and 23 right feet (20 moderate pronation, 3 severe pronation). Statistical analysis revealed no significant relationship between navicular drop degree and lower extremity muscle strength, flexibility, or static balance (P>0.05). A strong correlation was found between right and left navicular drop values (p < 0.05). No significant association was found between hip flexor flexibility and strength, balance, or navicular drop (P>0.05). However, a positive correlation was identified between dorsiflexor muscle strength and static balance (P CR - Aktan AK, Kutlay Ö. 2022. Sedanter kadın ve erkeklerde beden kitle indeksi ile pes planus, denge, yaşam kalitesi ve ağrı düzeyleri arasındaki ilişki. Saglik Bil Deger, 12(1): 58–64. CR - Alam F, Raza S, Moiz JA, Bhati P, Anwer S, Alghadir A. 2019. Effects of selective strengthening of tibialis posterior and stretching of iliopsoas on navicular drop, dynamic balance, and lower limb muscle activity in pronated feet: A randomized clinical trial. Phys Sportsmed, 47(3): 301-311. https://doi.org/10.1080/00913847.2018.1553466 CR - Bakırhan S, Elibol N, Özkeskin M, Özden F. 2021. The relationship between knee-ankle muscle strength and performance tests in young female adults with flexible pes planus. Bull Fac Phys Ther, 26(1): 1-7. CR - Benedetti MG, Ceccarelli F, Berti L, Luciani D, Catani F, Boschi M, Giannini S. 2011. Diagnosis of flexible flatfoot in children: A systematic clinical approach. Orthopedics, 34(2): e94–e100. https://doi.org/10.3928/01477447-20101221-04 CR - Çolak S, Akıl S. 2020. Üniversite öğrencilerinde ayak medial longitudinal ark durumunun denge ve esneklikle ilişkisi. Acibadem Univ Saglik Bilim Derg, 11(4): 625–630. CR - David E, Joseph B, Mohammad H, Joseph M, Elina S. 2020. Correlation of navicular drop to vertical and broad jump measurements in young adults. J Rehabil Ther, 2: 1-5. CR - Desmyttere G, Sylvain G, Michael B. 2019. Test-retest reliability of a hip strength assessment system in varsity soccer players. Phys Ther Sport, 37: 138-143. CR - El-Shamy FF, Ghait AS. 2014. Effect of flexible pes planus on postural stability in adolescent females. Int J Sci Res, 5: 6. CR - Güven M, Akman B, Aksu BÇ. 2015. Kalça ekleminde fizik muayene ve radyolojik değerlendirme. Totbid Derg, 14(1): 1-26. CR - Kaneko M, Sakuraba K. 2013. Association between femoral anteversion and lower extremity posture upon single-leg landing: Implications for anterior cruciate ligament injury. J Phys Ther Sci, 25(10): 1213-1217. https://doi.org/10.1589/jpts.25.1213 CR - Karartı C, Bilgin S, Büyükturan Ö, Büyükturan B. 2018. Arka ayaktaki pronasyon artışının fiziksel performans üzerine etkisi. Hacettepe Univ Fac Health Sci J, 5(1): 1-10. CR - Kızılcı H, Erbahçeci F. 2016. Pes planus olan ve olmayan erkeklerde fiziksel uygunluğun değerlendirilmesi. Fizyoter Rehabil, 27(2): 25-33. CR - Lizis P, Posadzki P, Smith T. 2020. Relationship between explosive muscle strength and medial longitudinal arch of the foot. Foot Ankle Int, 31(9): 815-822. CR - Marouvo J, Sousa F, André MA, Castro MA. 2023. Tibialis posterior muscle stiffness assessment in flat foot subjects by ultrasound-based shear-wave elastography. Foot, 54: 101975. CR - McDonald KA, Stearne SM, Alderson JA, North I, Pires NJ, Rubenson J. 2016. The role of arch compression and metatarsophalangeal joint dynamics in modulating plantar fascia strain in running. PLoS One, 11(4): e0152602. https://doi.org/10.1371/journal.pone.0152602 CR - Menz HB, Morris ME, Lord SR. 2005. Foot and ankle characteristics associated with impaired balance and functional ability in older people. J Gerontol A Biol Sci Med Sci, 60(12): 1546–1552. CR - Milenković S, Bubanj S, Živković D, Bubanj R, Purenović T, Obradović B, Dimić A, Bubanj M. 2011. Incidence of flat foot in high school students. Facta Univ Ser Physical Educ Sport, 9(3): 275-281. CR - Mosca VS. 2010. Flexible flatfoot in children and adolescents. J Child Orthop, 4(2): 107-121. CR - Ransimala GAA, Fernando DRM, Madhuwanthi DYRS, Nawakshana ADT, Rathnasiri HLDND, Wickramasinghe NH, Senavirathna SADCS, Senaratne UTN. 2020. Relationship between hip abductor muscle strength and flatfoot deformity among undergraduates. URL: http://ir.kdu.ac.lk/handle/345/2944 (accessed date: May 12, 2025). CR - Rathleff MS, Nielsen RG, Kersting UG. 2012. Navicula drop test ad modum Brody: Does it show how the foot moves under dynamic conditions? J Am Podiatr Med Assoc, 102(1): 34-38. CR - Şahin FN, Ceylan L, Küçük H, Ceylan T, Arıkan G, Yiğit S, Sarşık DÇ, Güler Ö. 2022. Examining the relationship between pes planus degree, balance and jump performances in athletes. Int J Environ Res Public Health, 19(18): 11602. CR - Silva RS, Smitheman HP, Smith AK, Silbernagel KG. 2022. Are static foot posture and ankle dorsiflexion range of motion associated with Achilles tendinopathy? Braz J Phys Ther, 26(6): 100466. CR - Telci EA, Aslan UB, Cavlak U. 2011. Sağlıklı quadriseps femoris kasında handheld dinamometrenin intrarater ve interrater güvenirliği. Clin Exp Health Sci, 1(2): 124-128. CR - Tome J, Nawoczenski DA, Flemister A, Houck J. 2006. Comparison of foot kinematics between subjects with posterior tibialis tendon dysfunction and healthy controls. J Orthop Sports Phys Ther, 36(9): 635-644. CR - Um GM, Wang JS, Park SE. 2015. An analysis on muscle tone of lower limb muscles on flexible flat foot. J Phys Ther Sci, 27(10): 3089-3092. CR - Ünver B, Keklik SS, Yıldırım T, Bek N. 2019. Pes planusun distal ve proksimal alt ekstremite biyomekanik parametreleri ve bel ağrısı üzerine etkilerinin incelenmesi. Turk J Physiother Rehabil, 30(2): 119-125. UR - https://doi.org/10.19127/bshealthscience.1740052 L1 - https://dergipark.org.tr/en/download/article-file/5045146 ER -