Pain Discomfort Enjoyment Levels During Moderate Exercise

Inclusion Criteria: * Age: 18-60 years. * BMI ≥ 18.5 kg/m2. * Typically exercise (moderate-intensity aerobic exercise - e.g. brisk walking) less than 150 minutes per week (last 3 months) * No known contraindications for participating in up to 42 minutes of moderate intensity physical activity. * Have not been told by a qualified healthcare provider to avoid moderate physical activity. Exclusion Criteria: * Unable/unwilling to provide informed consent. * Having motor impairment. * Currently diagnosed with diabetes mellitus, experiencing uncontrolled hypertension (i.e. systolic blood pressure (SBP) \> 140 mmHg or diastolic blood pressure (DBP) \> 90 mmHg), having a history of ischemic heart disease, cerebrovascular accidents, neurological disease or current/past severe psychiatric illness (e.g. severe depression, psychosis, schizophrenia) that required hospitalization, severe current untreated depression (i.e. score in the severe depression range on the Hospital Anxiety and Depression Scale; HADS), current suicidal ideation, and current or past suicide attempts. * Women who are pregnant or nursing. * Diagnosed history of eating disorders such as bulimia nervosa, anorexia nervosa. * Diagnosed history of substance abuse or alcohol abuse. * Currently undergoing pain management treatment (pharmacologic and or behavioral). * Currently taking anti-depressant medicines * Have been instructed by a qualified healthcare provider to refrain from moderate physical activity at any time during the last 12 months (reasons other than minor orthopedic injury etc.). * Any implanted medical devices (e.g. pacemaker). * Currently smoking (within last 12 months).