https://www.selleckchem.com/products/triparanol-mer-29.html [Purpose] To examine the correlation between toe flexor strength (TFS) and physical fitness performance measurements and their gender differences in the elderly. [Participants and Methods] Japanese males (n=50) and females (n=121), aged 65-88 years, participated in this study. We measured TFS, handgrip strength (HGS), knee extensor strength (KES), sit-and-reach distance (SR), and functional reach (FR). [Results] The female participants had significantly lower TFS, KES, and HGS than the male participants; however, the female participants had a significantly higher SR than that the male participants. FR was not significantly different between males and females. In males, TFS was significantly correlated with HGS, KES, SR, and FR. In females, TFS had correlations with HGS, KES, and FR; however, no correlation with SR was found. We could observe these correlations even after adjustment for age and body weight. [Conclusion] Elderly male had higher TFS than elderly females. In addition, TFS was correlated with all the physical fitness measurements in the male participants and all the measurements except for SR in the female participants. Gender and aging may explain the inconsistent results between SR and other physical fitness performance measurements.[Purpose] The thickness of the perimuscular connective tissue (PMCT) reflects muscular atrophy and decreased flexibility that may cause low back pain. However, few studies have used ultrasound imaging to measure PMCT thickness. We aimed to examine and confirm the reliability of ultrasound in measuring the thickness of the PMCT of the abdominal wall muscle. [Participants and Methods] The participants were 38 healthy adult males without chronic back pain. The images were acquired in B mode with the participants in the supine position and the PMCT thickness of the abdominal wall muscle was measured on the images. The intraclass correlation coefficient (ICC) was used t