Liskustyawati, H., Riyadi, S., Sabarini, S. S., Waluyo, W., & Purnomo Shidiq, A. A. (2020). Level of physical fitness of elderly people from 60 to 80 years old during a pandemic COVID-19. Health, Sport, Rehabilitation, 6(4), 27-38. https://doi.org/10.34142/HSR.2020.06.04.03