相关实验视频

Updated: May 2, 2026

Obtaining Quality Extended Field-of-View Ultrasound Images of Skeletal Muscle to Measure Muscle Fascicle Length
09:57

Obtaining Quality Extended Field-of-View Ultrasound Images of Skeletal Muscle to Measure Muscle Fascicle Length

Published on: December 14, 2020

3.7K

在156公里的山地超级马拉松比赛中,阿基里斯肌和三肌肌肉结构的纵向变化

Joffrey Drigny1, Marion Remilly2, Corentin Hingrand3

  • 1Service de Médecine du Sport, Service de Médecine Physique et de Réadaptation, CHU de Caen Normandie, Normandie University, UNICAEN, INSERM, COMETE, GIP CYCERON, Caen, France.

Journal of applied physiology (Bethesda, Md. : 1985)
|July 25, 2024
PubMed
概括

经验丰富的超级马拉松运动员在156公里比赛中显示了阿基里斯横截面区域 (AT CSA) 的显著变化. 由于压力,AT CSA最初下降,然后增加,这表明适应性持续在比赛后.

关键词:
阿基里斯肌高性能运行 运行 高性能运行机械生物学 机械生物学肌肉结构 肌肉结构 肌肉结构超声波学 超声波学 超声波学

更多相关视频

Author Spotlight: Exploring the Complexities of Achilles Tendon Injuries — Research and Future Directions08:48

Author Spotlight: Exploring the Complexities of Achilles Tendon Injuries — Research and Future Directions

Published on: October 27, 2023

686
Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research04:37

Author Spotlight: Integrating Mechanical and Biological Analysis in Tendinopathy Research

Published on: March 1, 2024

837

相关概念视频

Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
48.5K
Overview of Muscle Tissues01:25

Overview of Muscle Tissues

The human body has three types of muscle tissue: skeletal, smooth, and cardiac. Each class has unique properties that enable them to perform specific functions. However, all muscle tissues share certain properties, including elasticity, contractility, and excitability. 
Elasticity
Elasticity is the ability of muscles to stretch and return to their original shape. This property is partly due to elastic fibers — macromolecules that run through the muscles. These fibers are firm and...
23.2K
The Sarcomere01:08

The Sarcomere

A sarcomere is a microscopic segment repeating in a myofibril. The sarcomere fundamentally consists of two main myofilaments: thick filaments called myosin and thin filaments called actin. These filaments interact by sliding past each other in response to stimulus. In addition to myosin and actin, several other proteins, such as tropomyosin, troponin, titin, nebulin, myomesin, α-actinin, and dystrophin, play crucial roles in regulating, structuring, and functioning of the sarcomere.
Each...
18.2K
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
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...
6.2K
Structure of Cardiac Muscles01:13

Structure of Cardiac Muscles

Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
16.8K
Specialized Characteristics of Cardiac Muscles01:27

Specialized Characteristics of Cardiac Muscles

The primary role of cardiac muscles is to propel blood throughout the cardiovascular system. The cardiac muscle cells, or cardiomyocytes, exhibit specialized characteristics that allow them to perform this function.
Cardiac muscle cells are smaller than skeletal muscles, averaging 10–20 mm in diameter and 50–100 mm in length. However, they have large energy demands for continuous contraction and relaxation. This energy is almost exclusively derived from aerobic metabolism of energy...
6.7K