Hector Andres Acosta Pozo

Gait cycle and gait parameters explained with normal values: stance and swing (60/40), double support time (about 20% of the cycle, 26–30% over 70), cadence, step vs stride length and symmetry.

Average walking speed is 1.2–1.4 m/s (4.3–5.0 km/h). A table by age and sex, what counts as slow (0.6, 0.8, 1.0 m/s), why gait speed is the sixth vital sign, how to time your own walk and what change matters.

Four sarcopenia checks from the Asian guideline (AWGS 2019) you can do at home: the finger-ring test and calf size, SARC-F (4 or more), five chair stands (12 s or more) and a 6 m walk (under 1.0 m/s), and what helps.

What a gait analysis app for older adults and physiotherapists should measure, what walking speed and step length mean, two real walks compared, and a routine that shows real change.

Gait analysis apps work in very different ways: one camera, several cameras, phone sensors, insoles or walkways. What each measures, which run on iPhone and Android, the published evidence behind them and how to choose.