Pinto, R. F., M. Sanabin, B. Ninan, and N. R. Kunder. “PNF Stretching and Its Immediate Impact on Hamstring Flexibility and Agility”. International Journal of Research in Medical Sciences, vol. 14, no. 4, Mar. 2026, pp. 1537-42, doi:10.18203/2320-6012.ijrms20260965.