Association between physical performance and bone mass in community-dwelling postmenopausal Japanese women: The Unzen study

by Masahiro Suiko, Satoshi Mizukami, Kazuhiko Arima, Hiroki Nakashima, Takayuki Nishimura, Yoshihito Tomita, Yasuyo Abe, Natsumi Tanaka, Yuzo Honda, Michiko Kojima, Tetsuji Okawachi, Maiko Hasegawa, Youko Sou, Ritsu Tsujimoto, Mitsuo Kanagae, Makoto Osaki, Kiyoshi Aoyagi

Background

Low bone mass is an independent risk factor for osteoporotic fractures. We examined the association between physical performance and bone mass using quantitative ultrasound in community-dwelling postmenopausal Japanese women.

Methods

We conducted a cross-sectional study on 524 community-dwelling postmenopausal Japanese women who were not being administered osteoporosis medications. Physical performance was assessed on the basis of grip strength, chair stand time, and functional reach. The stiffness index was measured as a quantitative ultrasound parameter for heel bone mass.

Results

Physical performance, assessed by grip strength, chair stand time, and functional reach, and the stiffness index significantly decreased with age (both p Conclusions

Physical performance was significantly associated with heel bone mass in community-dwelling postmenopausal Japanese women.

Persistence of gut dysbiosis in individuals with anorexia nervosa

by Yukiko Morisaki, Noriyuki Miyata, Megumi Nakashima, Tomokazu Hata, Shu Takakura, Kazufumi Yoshihara, Takafumi Suematsu, Koji Nomoto, Kouji Miyazaki, Hirokazu Tsuji, Nobuyuki Sudo

Recent evidence suggests a crucial role of the gut microbiota in the pathogenesis of anorexia nervosa (AN). In this study, we carried out a series of multiple analyses of the gut microbiota of hospitalized individuals with AN over three months using 16S or 23S rRNA-targeted reverse transcription–quantitative polymerase chain reaction (PCR) technology (YIF-SCAN^®), which is highly sensitive and enables the precise quantification of viable microorganisms. Despite the weight gain and improvements in psychological features observed during treatment, individuals with AN exhibited persistent gut microbial dysbiosis over the three-month duration. Principal component analysis further underscored the distinct microbial profile of individuals with AN, compared with that of age-matched healthy women at all time points. Regarding the kinetics of bacterial detection, the detection rate of Lactiplantibacillus spp. significantly increased after inpatient treatment. Additionally, the elevation in the Bifidobacterium counts during inpatient treatment was significantly correlated with the subsequent body weight gain after one year. Collectively, these findings suggest that gut dysbiosis in individuals with AN may not be easily restored solely through weight gain, highlighting the potential of therapeutic interventions targeting microbiota via dietary modifications or live biotherapeutics.