Related Experiment Video
Updated: Feb 12, 2026
08:48
Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis
Published on: January 29, 2016
17.4K
Handgrip strength is associated with improved spirometry in adolescents.
Maia Phillips Smith1,2, Marie Standl1, Dietrich Berdel3
1Institute of Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany.
Plos One
|April 12, 2018
Summary
In healthy adolescents, handgrip strength, not physical activity, correlated with lung function measures like FEV1 and FVC. This suggests strength training may benefit lung health.
Area of Science:
- Adolescent Health
- Pulmonary Function Testing
- Exercise Physiology
Background:
- Pulmonary rehabilitation, incorporating aerobic exercise and strength training, is known to improve lung function in individuals with lung disease.
- Previous research indicated spirometry did not correlate with physical activity (PA) in healthy adolescents.
- The relationship between muscle strength and lung function in healthy adolescents remained unclear.
Purpose of the Study:
- To investigate the correlation between handgrip strength and spirometric indices in healthy adolescents.
- To determine if muscle strength is a better predictor of lung function than physical activity in this demographic.
Main Methods:
- A cohort of 1846 non-smoking, non-asthmatic German adolescents (mean age 15.2 years, 47% male) was studied.
- Handgrip strength was measured and correlated with spirometric indices (FEV1, FVC, PEF, FEF2575) using linear regression, with adjustments for age, height, and lean body mass.
- Analyses were conducted separately for each sex and further refined by modeling Z-scores and correcting for environmental factors.
Main Results:
- Handgrip strength showed a significant positive linear association with spirometric volumes and flows in both boys and girls.
- In boys, each kg increase in handgrip strength was linked to approximately 28 mL greater FEV1 and FVC, 60 mL/sec faster PEF, and 38 mL/sec faster FEF2575.
- These associations were consistently observed across puberty stages and remained significant after comprehensive statistical corrections, though effects were generally smaller in girls.
Conclusions:
- Handgrip strength is associated with spirometry in healthy adolescents, independent of physical activity levels.
- Future research on physical activity and lung function in adolescents should consider muscle strength alongside overall PA.
- Strength training interventions may hold potential benefits for healthy lung development, warranting further investigation to establish causality.
Related Concept Videos
03:05Acid Strength and Molecular Structure
33.2K
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...
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...
33.2K
01:18Cognitive Development During Adolescence
646
During adolescence, individuals experience significant cognitive development that enhances their understanding of others' emotions and thoughts, known as cognitive empathy. This period is marked by an increased ability to adapt to others' perspectives and a more nuanced understanding of others' mental states, a skill that is foundational for social problem-solving and conflict avoidance. The development of cognitive empathy relies heavily on the theory of mind — the...
646
01:20Strength of Cement
539
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...
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...
539
01:30Relation Between Tensile Strength and Compressive Strength of Concrete
700
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the...
700
02:18The Equilibrium Binding Constant and Binding Strength
15.2K
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:
15.2K
01:29Strength and Heat of Hydration
717
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
717