The prevalence of metabolic syndrome (MetS) is a health concern among Asians. Growing evidence indicates that Korean Americans had higher MetS prevalence compared to non-Hispanic Whites, but a culturally and linguistically appropriate lifestyle intervention has not been developed for Korean American middle-aged and older women. Thus, the investigators propose to develop a 4-week lifestyle intervention (Women's Active Living for Koreans (WALK) Study) to increase physical activity (PA) and reduce sedentary behavior for Korean American women.

The purpose of this pilot study is to develop a 4-week lifestyle intervention (Women's Active Living for Koreans (WALK) Study) to increase physical activity (PA) and reduce sedentary behavior for Korean American women. The investigators will assess feasibility and acceptability of the WALK Study and potential efficacy of the WALK Study on outcomes including sedentary behavior and PA.

Inclusion Criteria:

• Self-identified Korean-speaking Korean American women
• Sedentary lifestyle at work and/or during leisure time
• Aged between 40 and 69; 4) intention to be physically active
• KakaoTalk user

Exclusion Criteria

• Medical conditions or physical problems requiring a special care exercise program
• Known bone or join problems that impair the ability to do moderate physical activity
• Participating in a lifestyle modification program or research study
• Planning a trip out of the U.S. during the next 2 months
• Pregnancy.