The Body's Response to Aerobic Versus Resistance Exercise

The purpose of this study is to identify the body's response to aerobic vs. resistance exercise. Throughout this study, we will examine food intake, appetite, and physical and mental well-being before, during, and after aerobic and resistance exercise.

Inclusion Criteria:

• Body mass index between 18-29 kg/m2
• Weight stable (< 4.5 kg weight change within last 6 months)
• Non-smoking
• Constant habitual activity patterns within last 3 months
• Non-diabetic
• Resistive exercise training (≥ 2 times a week) based on reported physical activity levels (questionnaire)
• Aerobic exercise training (≥ 2 times a week, 30-min sessions) based on reported physical activity levels (questionnaire)
• Confirmation of acceptability of eating the study test foods (macaroni casserole)
• Approved to participate in this study by our study physician and principle investigator

The older subjects must also meet the following eligibility criteria:

• Age range: 65 years and older
• Body fat (women: <38%; men: <28%)
• Normal resting EKG as assessed by a Cardiologist

The younger subjects must also meet the following eligibility criteria:

• Age range: 18-29 years
• Body fat (women: <28%; men: <18%)

Exclusion Criteria:

• Body mass index: outside of the 18-29 kg/m2 range
• Gained or lost > 4.5 kg within the last 6 months
• Smoker (currently or within the last year)
• Intermittently been involved in a diet and/or exercise program within the last 3 months
• Clinically diagnosed as diabetic
• Did not perform resistive exercise training (currently or within the last 3 months) based on reported physical activity levels (questionnaire)
• Did not perform adequate aerobic exercise (currently or within the last 3 months) based on physical activity levels (questionnaire)
• Study food is found to be unacceptable for consumption by the subject
• Unapproved to participate in this study by our study physician and principle investigator

The older subjects:

• Age range: <65 yrs
• Body fat (women: >38%; men: >28%)
• Abnormal resting EKG (interpreted by a cardiologist) and assessed (for study exclusion) by our study physician, Arthur Rosen, MD

The younger subjects:

• Age range: outside the >29 yrs or <18 yrs
• Body fat (women: >28%; men: >18%)