Inclusion Criteria:  Physically healthy adults from 50 to 75 years old. Mini-mental state examination (MMSE) >= 24. Able to travel to study site independently. Literate in English. BMI within acceptable range (BMI scores from 18.5 to 24.9). Able to cycle on the NeeuroCycle recumbent bicycle device at a comfortable pace for a continuous period of three minutes without experiencing symptoms of severe breathlessness, fatigue, and pain. Fully vaccinated against COVID-19 (Government Approved Vaccines ONLY; at least two weeks from the date of the second vaccination)  Exclusion Criteria:  Any known neuropsychiatric disorders (such as dementia, epilepsy or mental retardation). Presence of end stage lung, cardiac, liver, and/or renal disease. Experienced any cerebrovascular and/or cardiac events in the last 6 months. Have active arthritis. Uncorrected gross hearing, visual and/or speech impairments. Prone to vertigo, motion sickness, and/or migraine episodes. Highly physically active.