Pabianek, Łukasz, K. Żołądkiewicz, and P. Brzezińska. “Physical Activity During Aging – Role of Physical Activity in Muscle Atrophy and Physical Impairment During Aging”. Quality in Sport, vol. 6, no. 3, Aug. 2020, pp. 42-54, doi:10.12775/QS.2020.019.