Percentage body fat and results of a periodic health examination

肥満や栄養過剰は多くの慢性疾患、とりわけ成人病と関連が強いことが従来から指摘されている。肥満の判定には体脂肪率を測定することが重要であるが、その方法の一つとして、集団検診に使用しやすい生体電気インピーダンス法（bioelectrical impedance analysis）がある。今回、1ビール製造工場の定期健康診断において、対象者男235人および女137人の体脂肪率をこの方法により測定した。まずこの体脂肪率とBMIおよび肥満度との相関関係を求め、男性より女性において相関が高いことを認めた。ついで肥満群と正常群に分けて、血圧および血液検査の異常率の出現頻度を統計的に比較したところ、肥満群では男女共に総コレステロールで、また男性では尿酸、γGTP、SGPTの各値で、異常者が高率であることを認めた。またSGPTは30才台から、γGTP及びTchは40才台からその傾向が見られた。しかし、肥満指数とこれらの検査値との相関係数は高くはなかった。Data from periodic health examinations such as ALP, UA, RBC, Hb, SGOT, SGPT, Tch(total choresterol), TG(triglyceride), blood pressure, body length, body weight and also percentage body fat(% Fat) as measured by bioelectrical impedance mehtod were obtained from 235 male and 137 female workers at a brewery factory in Okayama Prefecture and results were analyzed. The correlation coefficients for % Fat and Body Mass Index values(BMI) are found to be 0.678 for males and 0.803 for females. Examinees were then devided into normal and obesity groups respectively, and the frequency of values over normal ranges (classified by obesity indicators such as % Fat, BMI and obesity rate calculated from standard weight) were statistically compared. Results showed that % Fat and BMI were more sensitive than obesity rate and that the obesity group had statistically high frequencies of abnormality in some of the data as in the case of SGPT, γGTP and TG compared to the control group. Furthermore this tendency was found to be more significant among male workers than female ones

Recent Result from E821 Experiment on Muon g-2 and Unconstrained Minimal Supersymemtric Standard Model

Recently, the E821 experiment at the Brookhaven National Laboratory announced their latest result of their muon g-2 measurement which is about 2.6-\sigma away from the standard model prediction. Taking this result seriously, we examine the possibility to explain this discrepancy by the supersymmetric contribution. Our analysis is performed in the framework of the unconstrained supersymmetric standard model which has free seven parameters relevant to muon g-2. We found that, in the case of large \tan\beta, sparticle masses are allowed to be large in the region where the SUSY contribution to the muon g-2 is large enough, and hence the conventional SUSY search may fail even at the LHC. On the contrary, to explain the discrepancy in the case of small \tan\beta, we found that (i) sleptons and SU(2)_L gauginos should be light, and (ii) negative search for the Higgs boson severely constrains the model in the framework of the mSUGRA and gauge-mediated model.Comment: 10 pages, 5 figure

Comparison of V̇O2 for buoyancy and propulsion during swimming between male and female

体脂肪は人体の水中体重を小さくするから, 水泳には体脂肪の多いことが有利な条件となる可能性がある。本研究は水泳の際に浮くために使われるV̇O2と推進のために使われるV̇O2を測定し, 水中体重の大小が実際の水泳にどれほどの影響を与えているかという点について検討したものである。 男女各3名, 計6名の泳者に, 泳速が0.6, 0.8及び1.0m/secのクロール泳を行わせ, V̇O2を測定した。その際腰に錘をつけて水中体重を増加させ, あるいは滑車を介した錘で腰を引き上げるようにして水中体重を減少させ, 各水中体重において上記の測定を行った。V̇O2値を水中体重に対してプロットすることによって得られる回帰直線の勾配から浮くためのV̇O2を, またY切片から安静時V̇O2を差し引くことによって推進のためのV̇O2を求めた。 1 浮くために必要なV̇O2は泳速とは無関係であり, その平均値は男子の方(352±140ml/min)が女子のそれ(186±83ml/min)より有意に大であった。この差は水中体重に大きく依存していて, 単位水中体重当りに換算すると男女の値は接近した(男子: 117±46ml/min, 女子: 91±36ml/min)。 2 推進のために用いられるV̇O2は, 泳速の増加に伴って指数関数的に増大した。その増加率は男子よりも女子の方が大であったが, それは女子の水泳能力が男子のそれより劣ることに関連していると考えられる。 3 総V̇O2に対する推進のためのV̇O2の割合は, 男子よりも女子において大きく, この点女子の水中体重の小さいことは水泳において有利な条件になっている。男子の世界記録に対する女子のそれの比率は, 競泳の場合には競走の場合より大きいが, この差は女子の体脂肪の多いことが水泳では有利に作用していることに由来するものと考えられる。Body fat lessens underwater body weight and may offer an advantage for swimming performance. The present study was undertaken to measure separately V̇O2 for buoyancy and that for propulsion during swimming in the swimming flume and to elucidate the advantage of lower underwater body weight in female. Three male swimmers and three female swimmers participated as the subjects. V̇O2 was measured during free style swimming at a constant speed of 0.6, 0.8 and l.0m/sec.Underwater weight was increased stepwisely by loading an extra-weight around the subject's waist or decreased by suspending a weight which pulls the waist upward via a wire and pulleies. V̇O2 at a given speed depended proportionally on the underwater weight. V̇O2 for propu1sion was estimated by subtracting resting V̇O2 from the intercept on the ordinate, and V̇O2 for buoyancy was calculated from the slope. 1) V̇O2 for buoyancy was independent of swimming speed and the average value for female swimmers was much smaller than that for male swimmers (352±140m1/min for male, 186±83m1/min for female). This difference in V̇O2 for buoyancy depended largely on the difference in underwater weight as the calculated values of V̇O2 for buoyancy per kg of underwater weight revealed much smaller difference between sexes (117±46m1/min for male, 91±36m1/min for female). 2) V̇O2 for propulsion increased exponentially with increasing speed. The increasing rate was larger in female than in male. This is probably because of relative inferiority of swimming ability in the female group in this study. 3) The rate of propulsion V̇O2 to total V̇O2 during swimming was larger in female than in male. This represents the advantage of lower underwater weight in female for swimming. This result offers the probable explanation for the discrepancy which exists in male-female ratio of the world records between swimming and running

Anomaly-Mediated Supersymmetry Breaking with Axion

We construct hadronic axion models in the framework of the anomaly-mediated supersymmetry breaking scenario. If the Peccei-Quinn symmetry breaking is related to the supersymmetry breaking, mass spectrum of the minimal anomaly-mediated scenario is modified, which may solve the negative slepton mass problem in the minimal anomaly-mediated model. We find several classes of phenomenologically viable models of axion within the framework of the anomaly mediation and, in particular, we point out a new mechanism of stabilizing the axion potential. In this class of models, the Peccei-Quinn scale is related to the messenger scale. We also study phenomenological aspects of this class of models. We will see that, in some case, the lightest particle among the superpartners of the standard-model particles is stau while the lightest superparticle becomes the axino, the superpartner of the axion. With such a unique mass spectrum, conventional studies of the collider physics and cosmology for supersymmetric models should be altered.Comment: 20 pages, 5 figures, added footnotes and references for section

No-Scale Scenarios in the Light of New Measurement of Muon Anomalous Magnetic Moment

Supersymmetric contribution to the muon anomalous magnetic moment a_\mu is discussed in the no-scale-type supersymmetry breaking scenarios. Taking the correlation between the supersymmetric contributions to a_\mu and Br(b\to s\gamma), it is shown that the precise measurements of these quantities serve an important constraint on the relative sign of the gaugino masses; combining the 2.6-\sigma deviation in a_\mu from the standard-model prediction measured by the E821 experiment and Br(b\to s\gamma) measured by CLEO, the sign of the product M_2M_3 is strongly preferred to be positive, where M_2 and M_3 are SU(2)_L and SU(3)_C gaugino mass parameters, respectively. In particular, no-scale-type models with universal gaugino masses are in accord with the two constraints and also with the Higgs mass bound. In addition, it is also shown that future improvements in the measurements of a_\mu and Br(b\to s\gamma) may provide serious test of the cases with M_2M_3<0.Comment: 10 pages, 4 figures, published versio