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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

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Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
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The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

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The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
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Acid Strength and Molecular Structure03:05

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Binary Acids and Bases
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with increasing...
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Knee Joint01:23

Knee Joint

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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Strength of Cement01:20

Strength of Cement

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Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
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Infertility in Females01:28

Infertility in Females

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Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
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In vivo Measurement of Knee Extensor Muscle Function in Mice
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Association between knee extensor strength and pulmonary function in the female elderly.

Jaeseok Lee1, Dongwook Han1

  • 1Department of Physical Therapy, College of Health and Welfare, Silla University: 700 Beon-gil, 140 Baegyang-daero, Sasang-gu, Busan 46958, Republic of Korea.

Journal of Physical Therapy Science
|March 17, 2018
PubMed
Summary

Knee extensor strength in older women positively impacts lung capacity. Maintaining this strength is crucial for physical activity and respiratory health in the elderly.

Keywords:
Knee extensor strengthPhysical activityPulmonary function

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Area of Science:

  • Gerontology
  • Pulmonary Physiology
  • Kinesiology

Background:

  • Physical activity levels decline with age, impacting overall health.
  • Reduced physical activity in older adults is linked to decreased pulmonary function.
  • Knee extensor strength is a key indicator of mobility and physical capacity in the elderly.

Purpose of the Study:

  • To investigate the relationship between knee extensor strength and lung capacity in older women.
  • To determine if knee extensor strength, as a measure of physical activity, influences pulmonary function.

Main Methods:

  • Thirty-three older women participated in the study.
  • Lung capacity was measured using digital spirometry to assess Forced Vital Capacity (FVC).
  • Knee extensor strength was quantified using a hand-held dynamometer (HHD).

Main Results:

  • Significant positive correlations were observed between knee extensor muscle strength and key pulmonary function metrics: FVC, FEV1, PEF, and FEF 25-75%.
  • Weakening of knee extensor strength was associated with adverse effects on pulmonary function in the elderly.
  • The study indicated a weak, yet significant, explanatory power of knee extensor strength on pulmonary function.

Conclusions:

  • Knee extensor muscle weakness in elderly females can limit physical activity and mobility.
  • This limitation in physical capacity is a significant factor contributing to reduced lung capacity in older women.
  • Maintaining knee extensor strength is vital for preserving lung function and mobility in aging populations.