What is the clinical evidence from this study?

Study design: Cross-Sectional. Intervention: Prolonged exercise at ventilatory threshold vs. Boys vs Men. Primary outcome: Cardiovascular responses (heart rate, stroke volume, cardiac output).

What question did this study set out to answer?

This study aims to investigate how cardiovascular responses during prolonged exercise differ between boys and men at the ventilatory threshold.

June 1, 2000Medicine & Science in Sports & Exercise

Cardiovascular responses during prolonged exercise at ventilatory threshold in boys and men

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Key result

Prolonged exercise at ventilatory threshold elicited similar cardiovascular responses in boys and men, with heart rate increasing by 9.5% and 13.6% and stroke volume decreasing by 8.8% and 11.6%.

Why the study?

Do cardiovascular responses during prolonged exercise at ventilatory threshold differ between boys and men?

Population

18 males, comprising 8 boys (10-13 years) and 10 men (18-25 years)

Comparison

40-min submaximal exercise bout at an intensity… vs Comparison between boys and men

Design

Other

Follow-up

40 minutes

Authors

CCChristopher C. CheathamWestern Michigan University AMAnthony D. MahonBall State University JBJeffrey D. BrownUniversity of Nebraska–Lincoln

Discussion

Member takes

Implication

Supports similar drift in boys and men; extends adult data to youth but leaves open clinical translation.

Key Points

This study aims to investigate how cardiovascular responses during prolonged exercise differ between boys and men at the ventilatory threshold.
Eight boys (10-13 years) and 10 men (18-25 years) performed maximal exercise tests and a 40-min submaximal exercise at VO2 at VT (64.5% VO2max)
Heart rate (HR), stroke volume (SV), and mean arterial pressure were measured during exercise sessions
Comparisons were made over a 40-minute period.
Heart rate significantly increased by 9.5% in boys and 13.6% in men (P < 0.05) while stroke volume decreased by 8.8% and 11.6% respectively
Men showed greater cardiac output (P < 0.05) but blood pressure reduced by 4.2% over time, unlike boys whose blood pressure remained stable
Total peripheral resistance was higher in boys but unchanged during the exercise.

Study Design

Type

Cross-Sectional (n=18)

Structured PICO

Do cardiovascular responses during prolonged exercise at ventilatory threshold differ between boys and men?

Population

18 males (8 boys aged 10-13 years and 10 men aged 18-25 years) completing a 40-min submaximal exercise bout.

Exposure

40-min submaximal exercise bout at an intensity equal to the VO2 at ventilatory threshold (approximately 64.5% VO2max)

Comparator

Comparison between boys and men

Outcome

Cardiovascular responses including heart rate, stroke volume, cardiac output, mean arterial blood pressure, total peripheral resistance, and plasma volumesurrogate

Cardiovascular drift during prolonged exercise at ventilatory threshold is similar in magnitude between boys and men.

Cite This Study

Cheatham et al. (2000) reported a cross-sectional. Prolonged exercise at ventilatory threshold vs. Boys vs Men was evaluated on Cardiovascular responses (heart rate, stroke volume, cardiac output). Prolonged exercise at ventilatory threshold elicited similar cardiovascular responses in boys and men, with heart rate increasing by 9.5% and 13.6% and stroke volume decreasing by 8.8% and 11.6%.

synapsesocial.com/papers/6a22eee2fe259f704f7361ef https://doi.org/10.1097/00005768-200006000-00007

View Full Paper

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Cardiovascular responses during prolonged exercise at ventilatory threshold in boys and men

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

Cardiovascular responses during prolonged exercise at ventilatory threshold in boys and men

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

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