Cardiovascular response to interval and continuous training in women

Area of Science:

• Exercise Physiology
• Cardiovascular Adaptations
• Sports Science

Background:

• Understanding cardiovascular adaptations to exercise in women is crucial for optimizing training programs.
• Previous research has primarily focused on male responses to high-intensity training.

Purpose of the Study:

• To investigate the cardiovascular responses of young women to a 12-week interval and continuous training program.
• To compare the adaptations between interval training group (ITG) and continuous training group (CTG).

Main Methods:

• Three groups of five women (18-25 years) underwent a 12-week training program (4x/week).
• Cardiovascular responses were measured up to 85% maximal oxygen uptake (VO2 max) at baseline and weeks 4, 8, and 12.
• A control group was assessed at baseline, week 6, and week 12.

Main Results:

• Both training groups showed significant increases in the difference between arterial and mixed venous oxygen content (Cao2-Cvo2) by week 8 (CTG: 8.9%, ITG: 20.0% at 85% VO2 max).
• Further increases in Cao2-Cvo2 were minimal by week 12.
• No significant changes in stroke volume (SV) or cardiac output (Qc) were observed in either training group.

Conclusions:

• High-intensity training in young women leads to significant improvements in oxygen extraction capacity.
• These cardiovascular adaptations are achieved within 8 weeks of training.
• Women demonstrate similar cardiovascular adaptations to high-intensity training as previously observed in men.