“…Several studies show that individuals are subject to various barriers to volunteering (McKenzie et al, 2021 ; Southby et al, 2019 ; Sundeen et al, 2007 ), and we can identify internal and external barriers (Brandão & Bruno-Faria, 2017 ; M’Sallem, 2022 ; Southby et al, 2019 ; Sundeen et al, 2007 ), as we can see in Table 2 . Internal barriers can be shaped by the internal environment, and personal characteristics can influence the predisposition to volunteer (Friedman et al, 2015 ; Oliveira & Pinheiro, 2021 ; Shinbrot et al, 2021 ; Southby et al, 2019 ); in turn, external barriers can be related to the market, government and other external networks (Breeze, 2014 ; Hansen & Slagsvold, 2020 ; Oliveira & Pinheiro, 2021 ; Schwingel et al, 2017 ; Whittaker et al, 2015 ) (Appendix Table 2 ).…”