Related Experiment Video
Updated: Mar 17, 2026

Mimicking a Space Mission to Mars Using Hindlimb Unloading and Partial Weight Bearing in Rats
Published on: April 4, 2019
Physiological Responses to Hand-Carried Weights
Abstract:
In brief: Thirty trained men carrying either nothing, 1-lb weights, or 5-lb weights in each hand were tested on a motorized treadmill. The purpose was to determine whether using hand-held weights elicits a pressor reflex, in which heart rate and BP rise disproportionately to oxygen consumption (VO2). VO2 was measured during walking and running to see if it changed in proportion to heart rate response. Both walking and running while carrying 5-lb weights produced significant increases in V2, but only walking produced significant differences in heart rate. The oxygen pulse (the amount of oxygen used per heart beat) was not different for any of the three treatments. The authors concluded that carrying weights in the hands can help increase the training intensity for walkers or joggers who cannot or do not wish to jog or run at a higher speed.
More Related Videos
10:45A Community-based Stress Management Program: Using Wearable Devices to Assess Whole Body Physiological Responses in Non-laboratory Settings
Published on: January 22, 2018
09:35Measurement of the Hand Transmitted Vibration of the Human Hand Arm System During Operation of a Hand Tractor
Published on: June 16, 2021
Related Concept Videos
Exercise and Cardiovascular Response
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Exercise and Muscle Performance
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
Apparent Weight
Consider a person standing on a bathroom scale inside an elevator. If the scale is accurate at rest, its reading equals the...
Exercise and Cardiac Output
Sustained exercise increases the muscles' oxygen demand, which can be...