Publications by authors named "A Yoshiko"
Skeletal muscles contain lipids inside and outside cells, namely intramyocellular lipids (IMCL) and extramyocellular lipids (EMCL), respectively; lipids have also been found to be interspersed between these muscles as adipose tissue, namely intermuscular adipose tissue (IMAT). Metabolized IMCL has been recognized as an important substrate for energy production and their metabolism is determined by the muscle oxidative capacity. Therefore, it has been speculated that muscle oxidative capacity is related to muscle lipid content.
View Article and Find Full Text PDF: the purpose of this study was to determine the contributions of mechanical, neural, morphological, and muscle quality factors on individual differences in the maximal ankle dorsiflexion range of motion (ROM). : A sample of 41 university students performed passive-dorsiflexion and morphological measurements. In the passive-dorsiflexion measurement, while the ankle was passively dorsiflexed, maximal dorsiflexion ROM was measured in addition to passive torque at a given angle and muscle-tendon junction (MTJ) displacement during the last 13° as mechanical factors, and stretch tolerance and muscle activation were measured as neural factors.
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- - This study investigated how motor unit (MU) firing patterns differ between older hypertensive (both treated and untreated) and normotensive individuals during exercise, particularly focusing on knee extension activities and measuring their blood pressure response afterward.
- - Results showed that treated hypertensive individuals had lower MU firing rates compared to both untreated hypertensive and normotensive groups, and the change in systolic blood pressure (SBP) after exercise was more significant in treated hypertensives.
- - The research found a positive correlation between MU firing rates and SBP change only in untreated hypertensive individuals, indicating that their MU firing patterns were linked to blood pressure responses post-exercise, a relationship not seen in the other groups.
Article Synopsis
- This study investigates the relationship between skeletal muscle oxidative capacity and various muscle functions and exercise performance metrics in older adults to understand sarcopenia and frailty.
- It found that skeletal muscle oxidative capacity, measured by recovery speed of muscle oxygen saturation, is linked to gait speed but not to other muscle functions like peak torque or handgrip strength.
- The study concluded that while muscle oxidative capacity is essential for locomotion in aging individuals, it does not correlate with intramuscular adipose tissue content or other exercise performance measures.
Assessment of lower limb muscle mass and related functions in older individuals is important because of their essential role in maintaining locomotion and activities of daily living. Therefore, a simple and reliable method for assessing these parameters should be established. The seated step test is easy and safe and can be used to assess lower limb agility; however, its relationship to skeletal muscle mass and function remains unknown.
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