Albuterol and Immune Cell Composition

Inclusion Criteria: * Any gender * 21-44 years of age Exclusion Criteria: * Subjects must not: be younger than 21 or older than 44 years of age * Indicate a condition on the ACSM-AHA preexercise screening questionnaire indicating that physician approval is required prior to exercise * current user of tobacco products or have quit within the previous 6-months * body mass index of \>30 kg/m2, or waist girth of \>102cm for men and \>88cm for women * use over-the-counter medication known to affect the immune system (i.e. regular use of ibuprofen/aspirin, anti-histamines or beta-blockers) * have chronic/debilitating arthritis * have been bedridden in the past three months * have common illness (i.e. colds) within the past 6-weeks * have HIV * have hepatitis * have had a stroke * have major affective disorder * have any autoimmune disease * have central or peripheral nervous disorders * have blood vessel disease * have cardiovascular disease (CVD) * use of any prescription medication * pregnancy or are breast-feeding * asthma, emphysema, bronchitis, kidney disease; pheochromocytoma; diabetes; overactive thyroid * history of severe anaphylactic reaction to an allergen * or are scheduled to have surgery * Individuals who pass the exclusion criteria detailed above but present with more than one of the following CVD risk factors will also be excluded from the study: family history of myocardial infarction, coronary revascularization, or sudden death before 55 years of age in father or other male first-degree relative or before 65 years of age in mother or other female first-degree relative; hypertension (systolic blood pressure of \>140 mmHg or diastolic blood pressure \>90 mmHg); dyslipidemia (total serum cholesterol of \>200 mg/dl); pre-diabetes (fasting blood glucose of \>100mg/dl but \<126 mg/dl).