Why the definition evolved
Earlier approaches focused heavily on muscle mass. The revised European consensus emphasised strength because it is more closely linked to adverse functional outcomes.
Strength is not mass
Two people with a similar amount of muscle can produce different levels of force because neural activation, muscle quality and coordination also matter.
From measurement to function
A grip-strength test or lower-limb strength measure describes capacity. Chair rise, gait and stairs show how that capacity is expressed in real movement.
Established evidenceFactual statements are grounded in the publications listed below.
KŌMØ perspectiveKŌMØ favours a multidimensional, longitudinal reading of mobility.
LimitsThis page is educational and does not replace medical assessment when a change is recent, marked or accompanied by other symptoms.