Related Experiment Video

Updated: Oct 10, 2025

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

15.5K

Stroke Work Damping Ratio is Increased in Trained Athletes

L Lemes Coitinho, L J Cymberknop, I Farro

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 11, 2021
    PubMed
    Abstract

    More Related Videos

    Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage07:29

    Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage

    Published on: August 31, 2022

    1.9K
    A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers09:24

    A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

    Published on: January 28, 2020

    9.1K

    Related Concept Videos

    Types of Damping01:20

    Types of Damping

    If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
    6.8K
    Exercise and Cardiac Output01:17

    Exercise and Cardiac Output

    Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
    Sustained exercise increases the muscles' oxygen demand, which can be...
    1.4K
    Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

    Cardiac Output II: Effect of Stroke Volume on Cardiac Output

    Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
    Preload
    Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
    1.7K
    Damped Oscillations01:07

    Damped Oscillations

    In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
    Although friction and other non-conservative...
    6.2K
    Muscle Stimulation Frequency01:22

    Muscle Stimulation Frequency

    The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
    Wave summation
    At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
    3.3K
    Regulation of Stroke Volume01:27

    Regulation of Stroke Volume

    The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
    Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
    4.1K