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Related Concept Videos

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...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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...
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...
Power Expended by a Constant Force00:57

Power Expended by a Constant Force

The relationship between work done and the time taken to do it can be explained using the concept of power. For example, several sprinters in a race may have the same velocity when they reach the finish line, therefore doing the same amount of work, but the winner does it in the least amount of time. Thus, power is defined as the rate of doing work. Since work can vary as a function of time, the average power is defined as the work done during a time interval, divided by the time interval.
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 met...
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...

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Related Experiment Video

Updated: May 10, 2026

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
10:08

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

Jump training with different loads: effects on jumping performance and power output.

Srdjan Markovic1, Dragan M Mirkov, Olivera M Knezevic

  • 1University of Belgrade, Faculty of Sport and Physical Education, The Research Center, Blagoja Parovica 156, Belgrade, Serbia.

European Journal of Applied Physiology
|July 4, 2013
PubMed
Summary

Vertical jump training improves jump height similarly across different external loads. However, muscle power adaptations vary, particularly in the countermovement jump (CMJ), due to load-specific changes in jump mechanics.

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Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol
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Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

Published on: June 8, 2017

Related Experiment Videos

Last Updated: May 10, 2026

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
10:08

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol
08:21

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

Published on: June 8, 2017

Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Sports Science

Background:

  • Vertical jump performance is crucial in many sports.
  • Understanding how external loads affect jump training is important for optimizing performance.
  • Previous research has explored loaded jump training, but effects on muscle power output require further investigation.

Purpose of the Study:

  • To compare the effects of different external load types during vertical jump training on jump performance and muscle power.
  • To investigate the specific adaptations in squat jump (SJ) and countermovement jump (CMJ) performance and power output.

Main Methods:

  • Physically active males underwent 8 weeks of vertical jump training.
  • Training conditions included no load, negative load, positive load, and loaded vest (30% body weight).
  • Jump height and muscle power output for SJ and CMJ were measured.

Main Results:

  • All groups showed similar increases in jump height for both SJ (6.4-14.1%) and CMJ (7.4-11.8%).
  • Muscle power output increased comparably to jump height in SJ (7.4-11.5%), but less so in CMJ (0.5-9.5%) and was load-specific.
  • Negative and no-load training led to increased CMJ depth, duration, and reduced power output.

Conclusions:

  • Vertical jump training with various external loads can yield comparable improvements in jump performance.
  • Load-specific adaptations in CMJ mechanics can dissociate improvements in jump height from muscle power gains.
  • Training strategies should consider these load-specific effects for optimal power development.