What question did this study set out to answer?

To characterize the cardiovascular and hemodynamic responses to submaximal isometric handgrip exercise in healthy adolescents.

April 1, 1979CirculationOpen Access

Cardiovascular response to isometric exercise in normal adolescents.

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Why the study?

Does submaximal isometric handgrip exercise alter cardiovascular hemodynamics in normal adolescents?

Population

32 normal adolescents

Comparison

Submaximal isometric handgrip exercise at 25%… vs Rest (baseline measurements)

Design

Cross-sectional

Authors

WLW. Pennock LairdChildren's Medical Center DFDavid E. FixlerSouthwestern Medical Center FHF D HuffinesUniversity of Texas Health Science Center at Dallas

Discussion

Member takes

Implication

Supports adult-like responses in normal adolescents; extends prior observations but leaves open translation to disease states.

Key Points

To characterize the cardiovascular and hemodynamic responses to submaximal isometric handgrip exercise in healthy adolescents.
Evaluated 32 healthy adolescents at rest and during sustained isometric handgrip exercise at 25% maximum voluntary contraction.
Measured left ventricular dimensions and systolic time intervals using echocardiography, alongside blood pressure monitoring via sphygmomanometry.
Isometric handgrip exercise triggered significant increases in mean heart rate, systolic blood pressure, diastolic blood pressure, and mean blood pressure (all p < 0.001).
Cardiac index increased by 22% (p < 0.001) solely driven by elevated heart rate, while left ventricular dimensions, stroke volume, and systemic vascular resistance remained unchanged.
Left ventricular ejection indices showed no significant differences, except for a marked increase in the left ventricular ejection time index (p < 0.025).

Structured PICO

Does submaximal isometric handgrip exercise alter cardiovascular hemodynamics in normal adolescents?

Population

32 normal adolescents

Intervention

Submaximal isometric handgrip (IHG) exercise at 25% maximum contraction

Comparator

Rest (baseline measurements)

Outcome

Cardiovascular response including left ventricular dimensions, systolic time intervals, and blood pressuresurrogate

Submaximal isometric exercise in normal adolescents safely increases heart rate and blood pressure without altering left ventricular dimensions or stroke volume, similar to adult responses.

Cite This Study

Laird et al. (1979) studied this question.

synapsesocial.com/papers/6a73f72598d77be54ecdeb23 https://doi.org/10.1161/01.cir.59.4.651

Topics

Echocardiography

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Cardiovascular response to isometric exercise in normal adolescents.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Cardiovascular response to isometric exercise in normal adolescents.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Topics

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