Inclusion Criteria:  Age between 20-65 years old. With hot flashes. No current therapies such as hormone therapy, psychotropic medications, or sleeping pills for the past 6 months. With ability to follow instructions of stretching exercise.  Exclusion Criteria:  SBP >160 mmHg or DBP >100 mmHg Medical condition under investigation or unstable condition that could affect hot flashes, like thyroid disease. Any medical condition limiting the ability to participate the exercise.