Oxygen consumption and heart rate responses during five active exercises.

Area of Science:

• Cardiology
• Exercise Physiology
• Rehabilitation Medicine

Background:

• Cardiac rehabilitation programs aim to improve cardiovascular health and functional capacity in patients.
• Early mobilization is crucial in cardiac recovery, but its physiological impact needs careful assessment.
• Stage 1 bedside programs involve gentle exercises for patients with cardiac conditions.

Purpose of the Study:

• To measure the physiological responses (oxygen consumption and heart rate) to early-stage cardiac rehabilitation exercises.
• To evaluate the cardiovascular impact of specific active range-of-motion exercises in healthy young women.
• To determine the safety and intensity of these exercises for potential use in cardiac patients.

Main Methods:

• Twelve healthy female subjects (20-30 years old) participated in the study.
• Oxygen consumption (VO2) was measured using open-circuit spirometry.
• Heart rate (HR) and VO2 were recorded during rest and five active exercise bouts from a stage 1 cardiac rehabilitation program.

Main Results:

• Exercises involved combinations of upper and lower extremity movements in supine or semi-Fowler positions.
• The exercises elicited a low cardiovascular response.
• Average HR increased by less than 8 bpm and VO2 by less than 2.0 mL·kg−1·min−1.

Conclusions:

• The studied active exercises from a stage 1 cardiac rehabilitation program result in minimal cardiovascular stress.
• These findings suggest that such exercises are safe and appropriate for initiating mobilization in cardiac patients.
• Low-intensity range-of-motion exercises can be safely incorporated into early cardiac rehabilitation protocols.