This prospective longitudinal study aimed to investigate the long-term effectiveness and maintenance strategies following Proprioceptive Neuromuscular Facilitation (PNF) technique interventions in individuals with plantar fasciitis and limited dorsiflexion which is one of the conditions affecting the community. The primary objectives included quantitatively comparing pain levels, functional mobility, and patient adherence to prescribed strategies over an extended follow-up period. A cohort of 120 participants with plantar fasciitis and limited dorsiflexion, previously treated with PNF interventions, were enrolled in the study. Follow-up assessments were conducted at three-month intervals over a one-year period. Pain levels were measured using a Visual Analog Scale (VAS), functional mobility was assessed using the Foot and Ankle Ability Measure (FAAM), and patient-reported outcomes were recorded. Qualitative insights into maintenance strategies were obtained through in-depth interviews, covering aspects such as home exercise programs, lifestyle modifications, and adherence to recommendations. Also Kinovea software was used for analysing the dorsiflexion of the foot during gait. Statistical analysis revealed a statistically significant (p < 0.05) reduction in pain levels and improved functional mobility over the study period. Recurrence rates were found lower than baseline, with only 15% of recurrence. Logistic regression analysis identified factors contributing to sustained outcomes, including consistent adherence to prescribed home exercises (p = 0.021) and proactive lifestyle modifications (p = 0.035). This study provides the sustained effectiveness of PNF technique in plantar fasciitis individuals with limited dorsiflexion. The identified maintenance strategies, supported by statistically significant findings, offer practical implications for clinicians and patients, enhancing long-t maintenance strategies term outcomes in this specific patient population.