Thigh muscle cross-sectional area (CSA) and maximum voluntary isometric strength of knee extensor and flexor muscles were measured in 97 men (2065 years) and 162 women (2069 years) in sedentary Japanese adults. Each subject was assigned to one of five age groups (3^rd 4^th 5^th 6^th and 7^th decade) . Thigh muscle CSA was estimated by our developmental measuring system using an ultrasonographic device, which was connected to a PC for graphical processing. Muscle CSA for the 7^th decade in men was significantly smaller than that for the 3^rd decade. For women, muscle CSA were no significant from the 3^rd to the 7^th decade. The isometric knee extensor strength showed a significant decline with age from the 7^th decade in men, whereas there was no significant change with age in women. Isometric strength of knee flexors in men showed a gradual decline from the 5_th decade. The aging-associated reduction of muscle strength per muscle CSA in the extensors and flexors started from the 6_th decade in men. It was concluded that the size and strength of the thigh muscles begin to decrease simultaneously by approximately the 6_th decade in men, whereas there are no change until the 7^th decade in women.

Objective: To investigate the perception of the prevalence of mental diseases in breast cancer patients and the therapeutic approach to depression undertaken by oncologists. Method: Self-reported questionnaires were sent to 352 breast cancer specialists. The survey contains 11 categories to elicit the perception and identification of mental illnesses in patients, diagnostic procedure, and details of antidepressant prescribed. Logistic regression was used to explore the association of oncologists' characteristics and management of depression in breast cancer patients. Results: Survey response rate was 31.3%. Ninety percent of the oncologists perceived the prevalence of depression to be less than 20%, while half believed that the proportion was less than 5%. The most commonly-used medication for the treatment of depression was BZDs (41.5% [n=39]), followed by Selective Serotonin Reuptake Inhibitors (SSRIs) (30.9% [n=29]). Benzodiazepines (BZDs) were most frequently prescribed (41.5%) despite its known ineligible dependency, followed by Selective Serotonin Reuptake Inhibitors (SSRIs) (30.9%). Choice of BZDs was significantly associated with the career length of oncologists (Odds Ratio [OR]=8.20), and safety of drug (OR=5.57). Contrarily, prescription of SSRIs was associated with efficiency of drug (OR=7.07). Conclusion: Relative to anxiety and insomnia, a lower awareness regarding depression was common among study oncologists. In addition, the quality of care varied among these oncologists. It is necessary to improve both the awareness and management of mental illnesses in order to enhance the total clinical care of breast cancer patients.

Recently, a long-term health concern has been identified in young Japanese women. These women have a high percentage of body fat despite a normal shape index indicator such as BMI. This condition is called marked obesity, and shows relative low lean body mass. Using an analogous determination, we investigated low percentage of muscle quantity (LM) in the extremities of young Japanese women (n=156) . The cross-sectional areas of muscle, subcutaneous fat, and bone were measured in the upper arm and thigh using ultrasonography. Extremity shape index (CSA_t/L) was defined as the total extremity cross-sectional area (CSA_t) divided by the length of the limb (L), Percent muscle in each extremity (% MA) was calculated from the ratio of muscle CSA to whole limb CSA. LM was defined as the percentage of muscle in the upper arm or thigh less than 1 SD below average and the limb shape index less than 1 SD above average. Nine of 91 subjects displayed LM for the upper arm. A similar proportion of subjects showed LM for the thigh (15/156) . The muscle mass and strength in the upper arm or thigh were compared between the subjects with LM and non-LM subjects with a similar shape index of extremity. There was a tendency towards lower muscle mass and muscle strength in the subjects with LM. From the same comparison, the subjects with LM showed a greater load on extremity muscles to sustain the body weight (i.e., body weight per unit of upper arm or thigh muscle CSA) . To mitigate the deleterious health consequences of low percent muscle quantity it is recommended that young Japanese women who display such a condition should participate in a resistance-training program.

BACKGROUND: The Rugby World Cup (RWC) is one of the biggest international mega sports events in the world. This study was conducted to identify and evaluate the volume, nature, and severity of spectator medical care in the stadiums of 12 venues across Japan during RWC 2019. METHOD: This was a retrospective review of medical records from spectator medical rooms of 45 official matches of RWC 2019 between September 20 and November 2, 2019. All patients in the stadium who visited the spectator medical room and were transferred to a hospital were included. The wet bulb globe temperature (WBGT) value at the kick-off time of each match, the number of visits to the spectator medical room, and the number of transfers to a hospital were reviewed and analyzed. The patient presentation rate (PPR) was calculated per 10,000 attendees. Severity categories were defined as mild or severe. Mild cases were considered non-life threatening requiring minimal medical intervention, and severe cases required transport to a hospital. RESULT: The total number of visits to the spectator medical room was 449 with a PPR of 2.63. Most cases (91.5%) were mild in severity. The PPR was significantly higher for the matches held with a WBGT over 25 °C than for the matches under 21 °C (PPR 4.27 vs 2.04, p = 0.04). Thirty-eight cases were transferred to a hospital by ambulance; the PPR was 0.22. The most common reasons for transfer to the hospital were heat illness and fracture/dislocation, at a rate of 15.8% each. The incidence rate of cardiopulmonary arrest per 10,000 attendees was 0.0059 during RWC 2019. CONCLUSION Preparation and provision of appropriate medical service for spectators is a key factor for mass-gathering events. During RWC 2019, the majority (91.5%) of patients who sought medical attention did so for minor complaints, which were easily assessed and managed. On the other hand, a higher WBGT situation contributes significantly to an increased PPR (< 21 versus > 25, 2.04 versus 4.27, p = 0.04). Careful medical preparation, management, and development of public education programs for higher WBGT situations will be required in the future for similar international mega sports events.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Ambulatory Care/statistics & numerical data* ; Anniversaries and Special Events ; Child ; Child, Preschool ; Emergency Service, Hospital/statistics & numerical data* ; Female ; Football ; Hospitalization/statistics & numerical data* ; Humans ; Infant ; Infant, Newborn ; Japan ; Male ; Mass Behavior ; Middle Aged ; Retrospective Studies ; Young Adult