Maximum Power During Vertical Jump and Isometric Knee Extension Torque Alter Mobility Performance: A Cross‐Sectional Study of Healthy Individuals

Abstract

The study findings suggest that muscle power affects MP more than the muscle strength in persons aged ≥20 years.

Mechanical properties of muscles and tendon structures in middle-aged and young men

“…In addition, no differences in jump performances using only the ankle joint were noted between the two groups, whereas the age-related decline in power output during the vertical jump (multi-joint exercises) was already observed in middle-aged men (e.g. 6 ). In the future, therefore, we need to determine the mechanical properties of muscles and tendon structures in knee extensors of middle-aged people.…”

“…As described in “ I ntroduction”, previous studies showed that the age-related decline of power output has already begun from middle age 3 – 6 . However, the present results on jump performances using only ankle joint were different from previous findings.…”

“…It is known that age-associated decline of power is greater than that of muscle strength 1 , 2 , and the decline in power with aging has already begun by middle age, i.e., around forties 3 – 6 . Tsubaki et al 6 demonstrated in a cross-sectional study that the difference in power during a vertical jump between those in their 20 s and 40 s was greater than that in knee extension isometric strength. According to the findings of a longitudinal study 5 , the rate of decline in power with aging was also greater than that of isometric strength.…”

“…The vertical jump tests used in the previous studies as cited earlier 3 – 6 consisted of multi-joint movements, so is difficult to specify the muscles acting during tests. Therefore, we need to adopt the test to minimize the contribution of other joints and muscles in order to precisely evaluate the role of muscle and tendon properties.…”

Muscle Mechanography: A Novel Method to Measure Muscle Function in Older Adults

“…Muscle mechanography provides in-depth knowledge of the individual contributions of force and velocity to muscle power so interventions can be tailored to optimize the most influential component. Muscle mechanography can also be used to evaluate the potential of nursing therapeutic interventions in older adults (Caserotti et al, 2001;Dietzel et al, 2015;Rantalainen et al, 2010;Runge et al, 2004;Singh et al, 2014;Tsubaki et al, 2016).…”