The Characteristic Of Isometric Strength Of Different Body Parts Of 20-39 Vear-old Adults And The Screening Of The Assessment Index

ObjectiveMuscle strength is a component of physical fitness and health, the condition of muscle strength affects total health and well-being. Isometric strength test is a commonly used method that measures muscle strength, including traditional grip strength test, leg strength test and back strength test. This study introduced a new method of measuring strength of different parts of body, to investigate the characteristic of strength of different body and their correlation with physical fitness and health, and sort out strength that well-related to phvsical fitness and health, and finally screen the assessment index of whole body strengths.Subjects and methodsThe study recruited 246 healthy persons aged at 20-39y as the subjects. Physical fitness, body composition and bone fitness was tested. To explore the characteristic of isometric strength of different body parts and their correlation of physical fitness and health, including physical fitness, body composition and bone fitness. All parts of isometric strength was calculated. by factor analysis, in order to screen the assessment index of whole body strengths.Conclusion1. As to the 20-39 year-old person, age has no influence on the strength of different persons while gender is a influence factor.2. As a component of health-related fitness, the condition of fitness will influence the strength of different body part. 3. The strength and health-related fitness are interactive while the influence of strength to different components of fitness diversified. As to male, the correlation is higher than that of female, indicating that strength is more important to male than female.4. Whole body strength test system can be used to measure and assess the isometric strength of different body parts, the index system of measurement and assessment include hip strength, trunk strength and shoulder strength. Ihe index for man is leg abduction (left/right), trunk flexion/extension and shoulder abduction (left/right), with their weighting coefficient is 0.456,0.325,0.219 respectively. The index for woman is leg abduction (left/right), trunk flexion/extension hip extension (left/right)and shoulder abduction (left/right), with their weighting coefficient is 0.293,0.291,0.252,0.164.