Table 2.

Sarcopenia definitions according to sarcopenia working groups

EWGSOP	Pre-sarcopenia = low muscle mass, sarcopenia = low mass + function (strength or performance), severe sarcopenia = low mass, strength and physical performance
EWGSOP2	Probable sarcopenia = low muscle strength, confirmed sarcopenia = low muscle strength + low muscle mass or quality, severe sarcopenia = low muscle strength + low muscle mass/quality + reduced physical performance
AWGS	Possible sarcopenia = either low muscle strength or low physical performance only, sarcopenia = loss of muscle mass + low muscle strength + /or low physical performance
IWGS	Sarcopenia = gait speed of less than 1 m/s and an objectively measured low muscle mass

EWGSOP European Working Group on Sarcopenia in Older People (2010), EWGSOP2 updated EWGSOP guideline (2019), AWGS Asian Working Group for Sarcopenia, IWGS International Working Group for Sarcopenia