The primary objective of this study is to explore the effect of an exercise program combining aerobic and resistance exercises provided by mobile healthcare applications (hereinafter referred to as "app") on the body composition in app-using exercise group compared to non-exercise group.

Inclusion Criteria:

• Subjects who can perform a 12-week exercise program using the specified app during the study in Japan if they are assigned to the app-using exercise group.

• Subjects who agree to perform a 12-week exercise program using the app during the period specified in the protocol and not to change activities/exercise of daily living compared with before participation in the study except for the exercise program using the app if they are assigned to the app-using exercise group, or subjects who agree not to change activities/exercise of daily living compared with before participation in the study during the period specified in the protocol if they are assigned to the non-exercise group.

• Subjects with body mass index (BMI) of 25.0 kg/m^2 or more and less than 30.0 kg/m^2 at screening and baseline

• Subjects with waist circumferences meeting the following at screening and baseline. Male: 85 cm or more, Female: 90 cm or more

• Female subject who applied to one of the following

  • Subjects who are postmenopausal (without a menstrual period for at least 1 year) at the time of informed consent.
  • Subjects of non-childbearing potential due to undergoing surgery.
  • Females of childbearing potential who agree to use contraception during the participation in the study and have a negative pregnancy test at screening and baseline.

• Subjects who agree not to participate in clinical studies of drugs, regenerative medicine products, or medical devices, post-marketing clinical studies, or clinical research (including studies that do not use drugs, regenerative medicine products, or medical devices as with this study) other than this study after providing informed consent until the completion of the examination/observation at Week 12.

Exclusion Criteria:

• Subjects who regularly perform at least 1 session of exercise per week for at least 30 minutes per session on average other than activities of daily living during 6 months before providing informed consent.
• Subjects who receive treatment for obesity on an outpatient basis at the time of informed consent or plan to start treatment for obesity on an outpatient basis during the period until the completion of the examination/observation at Week 12.
• Subjects whose systolic blood pressure (sitting position at rest) is 160 mmHg or more or whose diastolic blood pressure (sitting position at rest) is 100 mmHg or more at screening or baseline.
• Subjects with concomitant uncontrolled hypertension or concomitant hypertension that is considered likely to be exacerbated by the exercise intervention.
• Subjects with previous or concomitant severe heart diseases (ischemic heart disease, myocardial infarction, congestive heart failure, angina pectoris, and arrhythmia requiring treatment with β-blockers and other drugs, etc.).
• Subjects with previous or concomitant cerebrovascular disorders (cerebral infarction, transient cerebral ischemia, etc.).
• Subjects with fasting blood glucose of 250 mg/dL or more or with positive urinary ketone bodies at screening.
• Subjects with concomitant uncontrolled diabetes or with diabetic complications (diabetic neuropathy, diabetic nephropathy, and diabetic retinopathy excluding simple retinopathy).
• Subjects with concomitant retinal neovascular lesions (exudative age-related macular degeneration, retinal vein occlusion, etc.) or concomitant retinopathy occurring within 6 months after laser photocoagulation.
• Subjects with previous or concomitant arteriosclerosis obliterans of lower extremities
• Subjects with concomitant motor disorders.
• Subjects with concomitant severe respiratory diseases.
• Subjects with concomitant severe liver diseases (viral hepatitis, drug-induced liver injury, etc.).
• Subjects with concomitant severe renal diseases (acute renal failure, glomerulonephritis, interstitial nephritis, etc.).
• Subjects with previous or concomitant malignancies. However, subjects are allowed to be enrolled if they have experienced no recurrence without the need for treatment within 5 years before providing informed consent.
• Subjects with previous or concomitant schizophrenia, psychiatric disorders such as bipolar disorder or major depressive disorder, or dementia.
• Subjects who are taking any of the following drugs at the time of informed consent: insulin preparations, sulfonyl urea hypoglycemic agents, short-acting insulin secretagogues (glinide), Glucagon-like peptide (GLP)-1 receptor agonists, biguanides, thiazolidines, Sodium-glucose co-transporter (SGLT)2 inhibitors, and anti-obesity drugs, or subjects who plan to receive any of these drugs during the period until the completion of the examination/observation at Week 12.
• Subjects who are taking any of the following at the time of informed consent: antidyslipidemic agents or drugs affecting lipid metabolism, supplements, and health foods (including foods for specified health use and foods with functional claims), or subjects who plan to take any of these during the period until the completion of the examination/observation at Week 12. However, subjects are allowed to take these drugs, supplements, or foods if they can take them with a stable dosage from at least 28 days before baseline until the completion of the examination/observation at Week 12.
• Subjects who have metal placed by lumbar spinal surgery and other surgery at the site where abdominal CT scan is performed.
• Subjects with implantable medical devices such as cardiac pacemakers and implantable defibrillators.
• Subjects who have participated or are participating in clinical studies of other drugs, regenerative medicine products, or medical devices, post-marketing clinical studies, or clinical research (including studies that do not use drugs, regenerative medicine products, or medical devices as with this study) within 12 weeks (84 days) before screening.
• Subjects who are employed by the research implementing entity of this study or institutions/organizations related to this study.
• Subjects who are considered ineligible for the participation in this study.

Access to anonymized individual participant level data will not be provided for this trial. Further details on Astellas' data sharing policy can be found at https://www.clinicaltrials.astellas.com/transparency/.