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Okada M.,Hiroshima Bunka Gakuen Two Year College | Kakehashi M.,Hiroshima University
International Journal of Biometeorology | Year: 2014

Previous studies of autonomic nervous system responses before and after eating when controlling patient conditions and room temperature have provided inconsistent results. We hypothesized that several physiological parameters reflecting autonomic activity are affected by outdoor temperature before and after a meal. We measured the following physiological variables before and after a fixed meal in 53 healthy Japanese women: skin temperature, systolic and diastolic blood pressure, salivary amylase, blood glucose, heart rate, and heart rate variability. We assessed satiety before and after lunch using a visual analog scale (100 mm). We recorded outdoor temperature, atmospheric pressure, and relative humidity. Skin temperature rose significantly 1 h after eating (greater in cold weather) (P = 0.008). Cold weather markedly influenced changes in diastolic blood pressure before (P = 0.017) and after lunch (P = 0.013). Fasting salivary amylase activity increased significantly in cold weather but fell significantly after lunch (significantly greater in cold weather) (P = 0.007). Salivary amylase was significantly associated with cold weather, low atmospheric pressure, and low relative humidity 30 min after lunch (P < 0.05). Cold weather significantly influenced heart rate variability (P = 0.001). The decreased low frequency (LF)/high frequency (HF) ratio, increased Δ LF/HF ratio, and increased Δ salivary amylase activity imply that cold outdoor temperature is associated with dominant parasympathetic activity after lunch. Our results clarify the relationship between environmental factors, food intake, and autonomic system and physiological variables, which helps our understanding of homeostasis and metabolism. © 2014 The Author(s).


Okada M.,Hiroshima Bunka Gakuen Two Year College | Kakehashi M.,Hiroshima University
SpringerPlus | Year: 2014

Purpose: The influences of body weight and air temperature on the autonomic response to food intake have not been clarified. We measured heart rate variability before and after lunch, as well as the effects of outdoor temperature and increased body mass index (BMI), in healthy young Japanese women. Methods: We studied 55 healthy young female university students. Heart rate variability was measured before lunch, immediately after lunch, 30 min after lunch, and 1 h after lunch to determine any correlations between heart rate variability, outdoor temperature, and BMI. In addition, multiple regression analysis was performed to elucidate the relationship between heart rate variability and outdoor temperature before and after lunch. A simple slope test was conducted to show the relationship between the low-to-high frequency ratio (1 h after lunch) and outdoor temperature. Results: Subjects were divided into a low BMI group (range: 16.6-20.3) and a high BMI group (range: 20.4-32.9). The very low frequency component of heart rate variability, an index of thermoregulatory vasomotor control exerted by the sympathetic nervous system, was significantly diminished after lunch in the high BMI group (P < 0.01). A significant decrease in the low-to-high frequency (LF/HF) ratio, which represents the balance between the parasympathetic and sympathetic nervous systems, was evident in the low BMI group after lunch, indicating parasympathetic system dominance (P = 0.001). In addition, a significant association was found between the LF/HF ratio and outdoor temperature after lunch with a lower BMI (P = 0.002), but this association disappeared with higher BMIs. Conclusion: Autonomic responses to eating showed clear differences according to BMI, indicating that the sensitivity of the autonomic nervous system may change with increases in BMI. © 2014 Okada and Kakehashi.


Murata M.,Hiroshima Bunka Gakuen Two Year College | Sugiyama S.,Prefectural University of Hiroshima | Ueda A.,Prefectural University of Hiroshima | Ishinaga M.,Prefectural University of Hiroshima
Journal of the Food Hygienic Society of Japan | Year: 2010

The contents of nitrate and nitrite in menus containing more than 350 g of vegetables per day were investigated. The amounts of vegetables in menu A developed by female students and menu B taken from a recipe book were 350 ±2 g and 457 ±77 g, respectively. The average content of the nitrate was 321.0± 139.3 mg (104.2-636.9 mg) in menu A, and 245.7±90.7 mg (140.1-507.3 mg) in menu B. Sixteen and thirteen samples exceeded the ADI in menus A and B, respectively. This may be because menu A contained more raw vegetables than menu B (menu A; 120 ±58 g, menu B; 72 ±71 g). The contents of nitrite in menu A and B were 1.2±0.3 mg (0.7-1.8 mg) and 2.8±0.9 mg (1.3-4.6 mg), respectively, and 6 samples in menu B exceeded the ADI. Intake of 35Og of vegetables or more in a day may reguire careful consideration of selection, frequency of use and cooking method, especially for vegetables with high nitrate content. A questionnaire to female students showed that 80% or more of students recognized that vegetables containing high contents of nitrate, such as spinach and komatsuna, should be boiled before eating them.


PubMed | Hiroshima Atomic Bomb Survivors Nursing Home Kurakake Nozomien, Hiroshima Bunka Gakuen Two Year College, Hiroshima Bunka Gakuen University, Hiroshima University and 2 more.
Type: | Journal: Geriatrics & gerontology international | Year: 2016

In an attempt to decrease the incidence of falls and fall-related fractures at a special geriatric nursing home, we endeavored to reduce diuretic doses, and examined the relationship between the effectiveness of this approach with the body compositions and activities of daily living of the study cohort.We enrolled 93 participants living in the community, 60 residents of an intermediate geriatric nursing home and 50 residents of the 100-bed Kandayama Yasuragien special geriatric nursing home. We recorded body composition using a multifrequency bioelectrical impedance analyzer. Daily loop diuretic and other diuretic regimens of those in the special geriatric nursing home were reduced or replaced with NY-mode diuretic therapy, namely, spironolactone 12.5mg orally once on alternate days.The incidence of falls fell from 53 in 2011 to 29 in 2012, and there were no fall-related proximal femoral fractures for 3 years after the introduction of NY-mode diuretic therapy. We also found statistically significant differences in muscle and intracellular water volumes in our elderly participants: those with higher care requirements or lower levels of independence had lower muscle or water volumes.We found that reducing or replacing daily diuretics with NY-mode therapy appeared to reduce the incidence of falls and fall-related proximal femoral fracture, likely by preserving intracellular and extracellular body water volumes. Low-dose spironolactone (12.5mg on alternate days) appears to be an effective means of treating elderly individuals with chronic heart failure or other edematous states, while preventing falls and fall-related fractures. Geriatr Gerontol Int 2016; : -.


PubMed | Hiroshima University and Hiroshima Bunka Gakuen Two Year College
Type: | Journal: SpringerPlus | Year: 2015

The influences of body weight and air temperature on the autonomic response to food intake have not been clarified. We measured heart rate variability before and after lunch, as well as the effects of outdoor temperature and increased body mass index (BMI), in healthy young Japanese women.We studied 55 healthy young female university students. Heart rate variability was measured before lunch, immediately after lunch, 30min after lunch, and 1h after lunch to determine any correlations between heart rate variability, outdoor temperature, and BMI. In addition, multiple regression analysis was performed to elucidate the relationship between heart rate variability and outdoor temperature before and after lunch. A simple slope test was conducted to show the relationship between the low-to-high frequency ratio (1h after lunch) and outdoor temperature.Subjects were divided into a low BMI group (range: 16.6-20.3) and a high BMI group (range: 20.4-32.9). The very low frequency component of heart rate variability, an index of thermoregulatory vasomotor control exerted by the sympathetic nervous system, was significantly diminished after lunch in the high BMI group (P < 0.01). A significant decrease in the low-to-high frequency (LF/HF) ratio, which represents the balance between the parasympathetic and sympathetic nervous systems, was evident in the low BMI group after lunch, indicating parasympathetic system dominance (P = 0.001). In addition, a significant association was found between the LF/HF ratio and outdoor temperature after lunch with a lower BMI (P = 0.002), but this association disappeared with higher BMIs.Autonomic responses to eating showed clear differences according to BMI, indicating that the sensitivity of the autonomic nervous system may change with increases in BMI.


Okada M.,Hiroshima Bunka Gakuen Two Year College | Kakehashi M.,Hiroshima Bunka Gakuen Two Year College
International journal of biometeorology | Year: 2014

Previous studies of autonomic nervous system responses before and after eating when controlling patient conditions and room temperature have provided inconsistent results. We hypothesized that several physiological parameters reflecting autonomic activity are affected by outdoor temperature before and after a meal. We measured the following physiological variables before and after a fixed meal in 53 healthy Japanese women: skin temperature, systolic and diastolic blood pressure, salivary amylase, blood glucose, heart rate, and heart rate variability. We assessed satiety before and after lunch using a visual analog scale (100 mm). We recorded outdoor temperature, atmospheric pressure, and relative humidity. Skin temperature rose significantly 1 h after eating (greater in cold weather) (P = 0.008). Cold weather markedly influenced changes in diastolic blood pressure before (P = 0.017) and after lunch (P = 0.013). Fasting salivary amylase activity increased significantly in cold weather but fell significantly after lunch (significantly greater in cold weather) (P = 0.007). Salivary amylase was significantly associated with cold weather, low atmospheric pressure, and low relative humidity 30 min after lunch (P < 0.05). Cold weather significantly influenced heart rate variability (P = 0.001). The decreased low frequency (LF)/high frequency (HF) ratio, increased Δ LF/HF ratio, and increased Δ salivary amylase activity imply that cold outdoor temperature is associated with dominant parasympathetic activity after lunch. Our results clarify the relationship between environmental factors, food intake, and autonomic system and physiological variables, which helps our understanding of homeostasis and metabolism.

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