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Related Concept Videos

Isotonic and Isometric Muscle Contractions01:22

Isotonic and Isometric Muscle Contractions

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Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while...
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Exercise and Muscle Performance01:27

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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.
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Exercise and Cardiac Output01:17

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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.
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Exercise Stress Test01:26

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Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
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Exercise and Cardiovascular Response01:20

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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...
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Chest Physiotherapy01:24

Chest Physiotherapy

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Chest Physiotherapy (CPT) is a therapeutic technique used in respiratory care to improve ventilation, clear bronchial secretions, and enhance the efficiency of respiratory muscles. This therapy includes three primary procedures: postural drainage, percussion, and vibration. It can be performed on spontaneously breathing patients and those who are intubated and mechanically ventilated.
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Related Experiment Video

Updated: Nov 3, 2025

Exergaming in Older People Living with HIV Improves Balance, Mobility and Ameliorates Some Aspects of Frailty
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Green Exercise: Can Nature Video Benefit Isometric Exercise?

Hansen Li1, Xing Zhang2, Shilin Bi3

  • 1Key Lab of Physical Fitness Evaluation and Motor Function Monitoring of General Administration of Sports of China, Institute of Sports Science, College of Physical Education, Southwest University, Chongqing 400715, China.

International Journal of Environmental Research and Public Health
|June 2, 2021
PubMed
Summary

Nature video viewing during isometric exercise improved mood and reduced perceived exertion. It also aided cardiac autonomic recovery, suggesting virtual nature can enhance green exercise benefits.

Keywords:
green exerciseindoor exerciseisometric exercisenaturenature-based stimulivideowall squat

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Area of Science:

  • Environmental Psychology
  • Exercise Physiology
  • Psychophysiology

Background:

  • Green exercise, combining physical activity with nature exposure, positively impacts health.
  • Urban living limits direct nature exposure, necessitating alternative methods for green exercise benefits.

Purpose of the Study:

  • To investigate the effects of nature video viewing on physiological and psychological responses during isometric exercise.
  • To assess the potential of virtual nature as a green exercise practice for urban populations.

Main Methods:

  • A randomized crossover trial with 18 male participants performing wall squats.
  • Comparison of nature video viewing versus a black screen control during exercise and recovery periods.
  • Measurement of perceived exertion (RPE, FS), heart rate (HR), and heart rate variability (HRV) indices (SDNN, RMSSD, SD1).

Main Results:

  • Nature video viewing significantly improved affective responses and reduced perceived exertion and heart rate during exercise.
  • During recovery, nature video viewing led to significantly higher RMSSD, SD1, and heart rate compared to control.
  • No significant differences were found in heart rate recovery (HRR) or most HRV indices between conditions.

Conclusions:

  • Nature video viewing can enhance the exercise experience by reducing perceived exertion and increasing pleasure.
  • Virtual nature stimuli show potential for improving cardiac autonomic recovery, supporting its role in green exercise.
  • Further research with diverse populations and virtual environments is needed to confirm these findings.