Exercise has been the cornerstone of diabetes management. However, many diabetic patients have ADL disabilities and experience substantial difficulty in performing usual exercises, such as brisk walking and upright cycling. There is an urgent need to provide alternative exercise modalities for diabetic patients with ADL disabilities. In this study, investigators will investigate the effects on the glucose of three exercise modalities, including motor-assisted cycling (i.e., cycling on a motor-driven bike) and functional electrical stimulation (FES) cycling, during which the investigators will use electrical current to facilitate cycling movements.

Inclusion Criteria:

• Age above 60 years.
• Physician-diagnosed type 2 diabetes.
• ADL disability (self-reported).

Exclusion Criteria:

• Fasting glucose ≥ 250 mg/dL.
• Symptomatic hypoglycemic events in the past three months.
• Insulin injection or infusion
• Systolic blood pressure ≥ 160 mmHg OR Diastolic blood pressure ≥ 100 mmHg
• Diagnosis of NYHA class I-IV heart failure
• Myocardial infarction in the past 6 months
• Recent or current angina, shortness of breath, or other symptoms suggestive of heart failure
• Diagnosed Cancer
• Unable to consent due to impaired cognitive function
• Bone fracture, joint dislocation, or joint stiffness
• Local skin disorders at the FES cuff area or CGM sensor area
• Implantable electronic or metallic devices, such as cardioverter defibrillator and pacemaker