EFFECTS OF AGEING AND VITAMIN D LEVEL ON PLANTAR FASCIA STIFFNESS.

Purpose: The study aimed to examine plantar fascia stiffness in individuals over and under 65 years of age, and to question the predicted effect of age and vitamin D level on the dominant side plantar fascia stiffness. Material and Methods: Forty adults were included to the study. The participants were divided into two groups as equal or above 65 years and below 65 years. Plantar fascia stiffness was evaluated using a digital hand-held myotonometer. Data on vitamin D levels were extracted from medical records. Results: Plantar fascia stiffness was higher in the right (Δ= 141.80±39.86 N/m, p=.001), and left foot (Δ=116.85±38.45 N/m, p=.004), and in the dominant side (Δ= 153.6±38.2 N/m, p<.001) in participants over 65 years of age. Age had a significant positive predicted effect on plantar fascia stiffness (β=.595, R2= 0.35, p<.001). Vitamin D level had a significant negative effect on plantar fascia stiffness (β=-.328, R2 =.108, p=.03). Conclusion: The results of the research showed that plantar fascia stiffness was higher in individuals over 65 years of age. The stiffness of PF is slightly decreased as the vitamin D level improved. [ABSTRACT FROM AUTHOR]