A Randomized Controlled Trial to evaluate the effects of the health guidance with video call as compared to the face to face health guidance

INTERVENTION: The face to face Health Guidance (20 minutes, 3 times in 90 days) The health Guidance with video call (20 minutes, 3 times in 90 days) CONDITION: The Volunteers who need motivational support in the "Specific Health Examination" (the person with obesity‐related high risk factors) PRIMARY OUTCOME: Body Weight Loss after three month of the health examination. INCLUSION CRITERIA: 1.The 40‐74 year olds who need motivational supports in the "Specific Health Examination" (the person with obesity‐related high risk factors). 2.The 30‐39 year olds with obesity‐related high risk factors, who are equivalent to those who need motivational supports in the "Specific Health Examination". 3.The person who don't need motivational supports but have obesity.