What question did this study set out to answer?

The study aims to investigate how intense leg exercise affects arm blood flow and oxygen consumption during combined arm-leg activities.

November 1, 2002The Journal of PhysiologyOpen Access

Arm blood flow and metabolism during arm and combined arm and leg exercise in humans

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Why the study?

Does combined arm and leg exercise reduce arm blood flow and oxygen consumption compared to arm exercise alone in healthy males?

Population

10 healthy male subjects, mean age 21 +/- 1 year

Comparison

Combined arm cranking with cycling for 5-6 min vs Arm cranking alone at 80% of maximum arm work…

Design

Other

Follow-up

5-6 min

Authors

SVStefanos VolianitisQatar University NSNiels H. SecherGeneral Cardiology

Discussion

Member takes

Implication

Indicates leg priority in blood flow distribution during combined exercise; leaves open effects on performance and relevance to patients.

Key Points

The study aims to investigate how intense leg exercise affects arm blood flow and oxygen consumption during combined arm-leg activities.
Ten healthy male subjects performed arm cranking and combined arm cranking with cycling at specified maximum work capacities.
Arm blood flow was measured using thermodilution in the axillary vein, while arterial and venous blood samples were collected.
Data analysis included calculations of oxygen consumption and vascular conductance during different exercise trials.
During combined exercise, arm blood flow decreased by 0.58 l min(-1) (19.1 %, P < 0.05) compared to arm-only exercise.
Arterio-venous O(2) difference increased from 122 ml l(-1) to 150 ml l(-1) (P < 0.05) during combined exercise.
Oxygen consumption in the arm was reduced by 9.6 % (P < 0.05), and vascular conductance dropped significantly during the combined trial.

Structured PICO

Does combined arm and leg exercise reduce arm blood flow and oxygen consumption compared to arm exercise alone in healthy males?

Population

10 healthy male subjects, mean age 21 +/- 1 year

Intervention

Combined arm cranking (at 80% of maximum arm work capacity) with cycling (at 60% of maximum leg work capacity) for 5-6 min

Comparator

Arm cranking alone at 80% of maximum arm work capacity

Outcome

Arm blood flow and O2 consumptionsurrogate

During maximal whole body exercise, arm vasoconstriction occurs to an extent that reduces oxygen delivery and utilization by working arm skeletal muscles.

Cite This Study

Volianitis et al. (2002) studied this question.

synapsesocial.com/papers/6a207de1e1fa5be4a5f41d18 https://doi.org/10.1113/jphysiol.2002.023556

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Arm blood flow and metabolism during arm and combined arm and leg exercise in humans

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Arm blood flow and metabolism during arm and combined arm and leg exercise in humans

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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