Table 3.

Description of the tailored strategies as per personalized goals in the mHealth intervention.

Principles	Actions
Practice availability	Set number of time slots and set available periods to practice brisk walking
Baseline fitness	Prefrail: start with a goal of 5-10 sessions/week*, Frail: start with a goal of 3-5 sessions/week*
Previous performance	Achievers: add 2-5 minutes/session and add 1 session/week; Nonachievers: goal remains as the best performance the participant has ever achieved in the previous weeks
Personal wish	Compromised with the participants according to their wishes (eg, confidence, motivation)

*A session is preset as a 10-minute brisk walking session.