Haruhiko Sato
Biographic Data
| ID | 3638215 |
|---|---|
| NAME | Haruhiko Sato |
| GIVEN NAMES | Haruhiko |
| FAMILY NAME | Sato |
| SIGNATURE | SATO H |
| AFFILIATIONS | Department of Ergonomics, Kyushu Institute for Design Research |
| ORCID | 0000-0002-1744-2388 |
| VERIFIED | Yes |
| TOTAL WORKS | 17 |
| TOTAL CITATIONS | 0 |
| WORKS AS AUTHOR | 17 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1965 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 0 |
The Effects of Neighborhood Physical and Social Environment on Physical Function among Japanese Community-Dwelling Older Adults
Previous studies have shown a relationship between physical and social aspects of the neighborhood environment (e.g., built environment, safety) and physical function in older adults. However, these associations are unclear in older Asian adults because longitudinal studies are lacking. This study examined the effects of neighborhood physical and social environment on longitudinal changes in physical function among Japanese older adults. We analy…
Somatotype in Relation to Profession in Elderly Japanese
子どもから老人に至るまで,一般日本人のソマトタイプの研究はほとんど行われていない。さらにまた生業,生活環境を考慮したソマトタイプの研究は内外を問わず全く行われていない。本研究は長年一定の職業に就いてきた高齢者が,どのような体形特徴を持つかを知るために行われた。対象は日本の伝統的な生業である農業,漁業に従事する集団と,多様な職業が混在する大都会の集団で,被験者の年齢は50代から90代である。農村被験者男51名,女42名,漁村被験者男53名,女48名,東京都心の被験者男55名,女66名の身体測定を行い,Heath-Carter法によりソマトスコアを算出した。その結果,身体サイズは男女とも農村と漁村の間に差はないが,都心の被験者は体が大きいことが分かった。これには生業に伴うエネルギー消費の違い,食習慣の違いの他に,通婚圏の広さの違いも重要な要因になっていることが示唆された。また,ソマトタイプには地域差ないし生業による差が認められた。都心の男女には内胚葉型が多く,農・漁村では中胚葉型が多かった。…
Human walking
歩行研究は日常生活における自然歩行と実験室内で実施される実験歩行に分けることができる。これらの方法から得られた結果は同じ速度であっても一致しないものがあり,またそれぞれの実験条件でしか観察できない内容もある。そこで,本稿では両者の結果を示すことにより,その違いを明確にしながらヒトの歩行の特徴を論じた。歩行の特徴は歩幅および歩調を資料として速度,性,年齢および民族別に考察した。またこれに加えて,自然歩行では時代,履物および地域差についても論じた。実験歩行については床歩行とトレッドミル歩行に分け,歩行時の上肢動作およびエネルギー代謝量についても言及した
Differences of fatigability for static contraction in human limb muscles
The relationship between force level of isometric contraction and time of three indices of muscular fatigue was studied for the shoulder abductors, elbow flexors, elbow extensors, knee flexors, knee extensors, plantar flexors and dorsiflexors in 5-7 males. Endurance tasks were performed at the contraction levels of 5, 10, 15, 20, 30, 40 and 50% of the maximal voluntary contraction (MVC). The relative force (F%MVC) versus the endurance time or the…
Comparative study on physique and physical fitness of elementary schoolchildren between urban and mountainous rural areas
The physique and physical fitness of the urban and the mountainous rural schoolchildren were compared. The subjects were elementary schoolchildren aged from 9.2 to 12.8 years. The urban samples were 154 boys and 163 girls in an elementary school located at Meguro-ku in central Tokyo. The rural samples were 94 boys and 92 girls from 8 elementary schools in Shiiba village in the Miyazaki Prefecture.The results obtained are as follows:1) There were …
Fiber type transformation in human skeletal muscle
ヒトの骨格筋の筋繊維組成の大枠は遺伝により決定されているが,動物実験の結果やヒトにおける筋繊維型の転換を示唆する知見から,ヒトにおいても筋繊維型の転換が生じていると考えられる。持久性訓練或いは日常活動によってII B 型→II A 型→I型の方向に繊維型が変化する。II C 型II A 型から I 型に変化する過程での過渡的な型である。この変化は可逆的で,訓練の中止や不活動によって逆方向の変化が生じる。この逆方向の変化を別にすれば,I型繊維からII型繊維への転換はより困難であると考えられる。運動選手における筋繊維組成や筋繊維組成の年齢的変化は,このように考えると説明できる。喫煙や栄養状態や甲状腺ホルモンも筋繊維組成に影響を与える
Power Spectra of Surface Electromyograms of School Children
The bipolar surface electromyogram (EMG) of the biceps brachii of school children was recorded during isometric contraction. The EMG power spectrum was obtained for the frequeny range from 6Hz to 192Hz by the autocorrelation and its Fourier transformation technique. The EMG power spectra of school children were compared with those of male adults examined previously. There was no significant difference in the EMG power spectra between school boys …
Wijesekera, N. D., 1964
Six male students performing a standardized exercise were studied in the following conditions: (1) 15°C/50 % R. H. (cool condition), (2) 20°C/50 % R. H. (comfortable condition), (3) 35°C/30 % R. H. (warm-dry condition), and (4) 35°C/80%R. H. (warm-humid condition). The exercise consisted of pedaling a bicycle ergometer for 20 minutes at moderate work load followed by a 4-minutes period of heavy work. Pulmonary ventilation, oxygen uptake, carbon d…
Postural Changes during Working in Standing Position
Position of the line of gravity of the body, electromyograms of the leg muscles, heart rate and tracking errors were recorded continuously during thirty minutes' pursuit tracking while standing without shifting the foot position in fifteen subjects. Some subjects maintained the line of gravity near a central position over the feet, while some subjects showed shifting of the line of gravity to one foot. The heart rate as a whole increased over tim…
Differential Fatiguability of Human Skeletal Muscles
Fatiguability for sustained isometric contraction was investigated for human limb muscles by means of frequency analysis of the bipolar surface electromyogram. The contraction strength was two-thirds or a half of themaximum strength. The increase of slow wave ratio (the proportion of the integrated amplitude in the frequency component below 60 Hz to the total activity) in the electromyogram from initial slow wave ratio was calculated to evaluate …
Effort depending Changes in Surface Electromyogram during Fatiguing Isometric Contraction
The power spectra of bipolar surface EMG of the right biceps brachii in weak isometric contraction during fatiguing contraction of the left biceps brachii were obtained. The onset of the contraction of the left biceps caused no conspicuous change in the EMG power spectrum of the right biceps, except a small increase in the power around 15 Hz. The increase in the power around 15 Hz and/or the increase in the total power observed in the right bicep…
Electromyographic Study of Muscle Fatigue in Sustained Isometric Contractions
The power spectra of bipolar surface EMG during sustained isometric contractions of the biceps brachii were obtained by the autocorrelation and its Fourier transformation technique. The power of the frequency components below about 75 Hz increased with time. The ratio of the power below about 40 Hz to the total power increased. Two phases were suggested in a sustained contraction. In the first phase, the total power increased slightly, and relati…
Heart Rate as an Index of Oxygen Intake
The purpose of this study is to investigate the relibaility and validity of prediction of the oxygen intake during works on the basis of heart rate at work.During four kinds of standard treadmill walking of 3.6km/h with a slope varying from o to 15 degrees and four kinds of standard bicycle ergometer work of o to 900kgm/min, the oxygen intake and heart rate were measured on four young adult males(Table1).For the whole subjects and for each indivi…
Power Spectral Analysis of Surface Electromyograms during Isometric Contractions
The power spectra of the bipolar surface EMG during isometric contractions for various human skeletal muscles were obtained for the frequency range from 6 to 378 Hz by the autocorrelation and its Fourier transformation technique. The effect of small movement artifact appeared in the frequencies below 10 Hz and the effect of the ECG around 15 Hz. Although there were some variations in the EMG power spectra of a muscle among subjects, there existed…
Some Factors Affecting the Power Spectra of Surface Electromyograms in Isometric Contractions
In order to investigate the variations in the EMG power spectra, the power spectra of the bipolar surface EMG of the biceps brachii were obtained for the frequency range from 6 to 192 Hz by the autocorrelation and its Fourier transformation technique. The EMG power spectra of the biceps brachii showed relatively definite pattern with some intra- and inter-individual variations. The difference in the EMG power spectra between the right and left bi…
Cooling Effects on the Muscular Activity
Global EMG of various muscles in approximately isometric-isotonic contractions were recorded before and during the cooling of the muscles, and changes in frequency components were studied using an automatic frequency analyzing integrator.Skin temperature near the recording electrodes were used as a measure of the degree of cooling.The frequency spectrum showed remarkable lowering when the muscle was cooled. The degree of spectrum changes were rev…
Differential Fatiguability between the One- and Two-Joint Muscles
The present study was designed to confirm the differential f atiguability between the one and two-joint muscles by the frequency analysis of the EMG activities of each pair of elbow flexors (M. biceps brachii and M. brachioradialis), knee extensors (M. rectus femoris, M. vastus medialis, and M. vastus lateralis), and ankle extensors (M. gastrocnemius and M. soleus). The results are summarized as follows :(1) The lowering in the frequency spectra …
No prominent works on this page.
Differential Fatiguability between the One- and Two-Joint Muscles
The present study was designed to confirm the differential f atiguability between the one and two-joint muscles by the frequency analysis of the EMG activities of each pair of elbow flexors (M. biceps brachii and M. brachioradialis), knee extensors (M. rectus femoris, M. vastus medialis, and M. vastus lateralis), and ankle extensors (M. gastrocnemius and M. soleus). The results are summarized as follows :(1) The lowering in the frequency spectra …
Cooling Effects on the Muscular Activity
Global EMG of various muscles in approximately isometric-isotonic contractions were recorded before and during the cooling of the muscles, and changes in frequency components were studied using an automatic frequency analyzing integrator.Skin temperature near the recording electrodes were used as a measure of the degree of cooling.The frequency spectrum showed remarkable lowering when the muscle was cooled. The degree of spectrum changes were rev…
Power Spectral Analysis of Surface Electromyograms during Isometric Contractions
The power spectra of the bipolar surface EMG during isometric contractions for various human skeletal muscles were obtained for the frequency range from 6 to 378 Hz by the autocorrelation and its Fourier transformation technique. The effect of small movement artifact appeared in the frequencies below 10 Hz and the effect of the ECG around 15 Hz. Although there were some variations in the EMG power spectra of a muscle among subjects, there existed…
Some Factors Affecting the Power Spectra of Surface Electromyograms in Isometric Contractions
In order to investigate the variations in the EMG power spectra, the power spectra of the bipolar surface EMG of the biceps brachii were obtained for the frequency range from 6 to 192 Hz by the autocorrelation and its Fourier transformation technique. The EMG power spectra of the biceps brachii showed relatively definite pattern with some intra- and inter-individual variations. The difference in the EMG power spectra between the right and left bi…
Electromyographic Study of Muscle Fatigue in Sustained Isometric Contractions
The power spectra of bipolar surface EMG during sustained isometric contractions of the biceps brachii were obtained by the autocorrelation and its Fourier transformation technique. The power of the frequency components below about 75 Hz increased with time. The ratio of the power below about 40 Hz to the total power increased. Two phases were suggested in a sustained contraction. In the first phase, the total power increased slightly, and relati…
Heart Rate as an Index of Oxygen Intake
The purpose of this study is to investigate the relibaility and validity of prediction of the oxygen intake during works on the basis of heart rate at work.During four kinds of standard treadmill walking of 3.6km/h with a slope varying from o to 15 degrees and four kinds of standard bicycle ergometer work of o to 900kgm/min, the oxygen intake and heart rate were measured on four young adult males(Table1).For the whole subjects and for each indivi…
Differential Fatiguability of Human Skeletal Muscles
Fatiguability for sustained isometric contraction was investigated for human limb muscles by means of frequency analysis of the bipolar surface electromyogram. The contraction strength was two-thirds or a half of themaximum strength. The increase of slow wave ratio (the proportion of the integrated amplitude in the frequency component below 60 Hz to the total activity) in the electromyogram from initial slow wave ratio was calculated to evaluate …
Effort depending Changes in Surface Electromyogram during Fatiguing Isometric Contraction
The power spectra of bipolar surface EMG of the right biceps brachii in weak isometric contraction during fatiguing contraction of the left biceps brachii were obtained. The onset of the contraction of the left biceps caused no conspicuous change in the EMG power spectrum of the right biceps, except a small increase in the power around 15 Hz. The increase in the power around 15 Hz and/or the increase in the total power observed in the right bicep…
Postural Changes during Working in Standing Position
Position of the line of gravity of the body, electromyograms of the leg muscles, heart rate and tracking errors were recorded continuously during thirty minutes' pursuit tracking while standing without shifting the foot position in fifteen subjects. Some subjects maintained the line of gravity near a central position over the feet, while some subjects showed shifting of the line of gravity to one foot. The heart rate as a whole increased over tim…
Wijesekera, N. D., 1964
Six male students performing a standardized exercise were studied in the following conditions: (1) 15°C/50 % R. H. (cool condition), (2) 20°C/50 % R. H. (comfortable condition), (3) 35°C/30 % R. H. (warm-dry condition), and (4) 35°C/80%R. H. (warm-humid condition). The exercise consisted of pedaling a bicycle ergometer for 20 minutes at moderate work load followed by a 4-minutes period of heavy work. Pulmonary ventilation, oxygen uptake, carbon d…
Power Spectra of Surface Electromyograms of School Children
The bipolar surface electromyogram (EMG) of the biceps brachii of school children was recorded during isometric contraction. The EMG power spectrum was obtained for the frequeny range from 6Hz to 192Hz by the autocorrelation and its Fourier transformation technique. The EMG power spectra of school children were compared with those of male adults examined previously. There was no significant difference in the EMG power spectra between school boys …
Fiber type transformation in human skeletal muscle
ヒトの骨格筋の筋繊維組成の大枠は遺伝により決定されているが,動物実験の結果やヒトにおける筋繊維型の転換を示唆する知見から,ヒトにおいても筋繊維型の転換が生じていると考えられる。持久性訓練或いは日常活動によってII B 型→II A 型→I型の方向に繊維型が変化する。II C 型II A 型から I 型に変化する過程での過渡的な型である。この変化は可逆的で,訓練の中止や不活動によって逆方向の変化が生じる。この逆方向の変化を別にすれば,I型繊維からII型繊維への転換はより困難であると考えられる。運動選手における筋繊維組成や筋繊維組成の年齢的変化は,このように考えると説明できる。喫煙や栄養状態や甲状腺ホルモンも筋繊維組成に影響を与える
Comparative study on physique and physical fitness of elementary schoolchildren between urban and mountainous rural areas
The physique and physical fitness of the urban and the mountainous rural schoolchildren were compared. The subjects were elementary schoolchildren aged from 9.2 to 12.8 years. The urban samples were 154 boys and 163 girls in an elementary school located at Meguro-ku in central Tokyo. The rural samples were 94 boys and 92 girls from 8 elementary schools in Shiiba village in the Miyazaki Prefecture.The results obtained are as follows:1) There were …
Differences of fatigability for static contraction in human limb muscles
The relationship between force level of isometric contraction and time of three indices of muscular fatigue was studied for the shoulder abductors, elbow flexors, elbow extensors, knee flexors, knee extensors, plantar flexors and dorsiflexors in 5-7 males. Endurance tasks were performed at the contraction levels of 5, 10, 15, 20, 30, 40 and 50% of the maximal voluntary contraction (MVC). The relative force (F%MVC) versus the endurance time or the…
Human walking
歩行研究は日常生活における自然歩行と実験室内で実施される実験歩行に分けることができる。これらの方法から得られた結果は同じ速度であっても一致しないものがあり,またそれぞれの実験条件でしか観察できない内容もある。そこで,本稿では両者の結果を示すことにより,その違いを明確にしながらヒトの歩行の特徴を論じた。歩行の特徴は歩幅および歩調を資料として速度,性,年齢および民族別に考察した。またこれに加えて,自然歩行では時代,履物および地域差についても論じた。実験歩行については床歩行とトレッドミル歩行に分け,歩行時の上肢動作およびエネルギー代謝量についても言及した
Somatotype in Relation to Profession in Elderly Japanese
子どもから老人に至るまで,一般日本人のソマトタイプの研究はほとんど行われていない。さらにまた生業,生活環境を考慮したソマトタイプの研究は内外を問わず全く行われていない。本研究は長年一定の職業に就いてきた高齢者が,どのような体形特徴を持つかを知るために行われた。対象は日本の伝統的な生業である農業,漁業に従事する集団と,多様な職業が混在する大都会の集団で,被験者の年齢は50代から90代である。農村被験者男51名,女42名,漁村被験者男53名,女48名,東京都心の被験者男55名,女66名の身体測定を行い,Heath-Carter法によりソマトスコアを算出した。その結果,身体サイズは男女とも農村と漁村の間に差はないが,都心の被験者は体が大きいことが分かった。これには生業に伴うエネルギー消費の違い,食習慣の違いの他に,通婚圏の広さの違いも重要な要因になっていることが示唆された。また,ソマトタイプには地域差ないし生業による差が認められた。都心の男女には内胚葉型が多く,農・漁村では中胚葉型が多かった。…
The Effects of Neighborhood Physical and Social Environment on Physical Function among Japanese Community-Dwelling Older Adults
Previous studies have shown a relationship between physical and social aspects of the neighborhood environment (e.g., built environment, safety) and physical function in older adults. However, these associations are unclear in older Asian adults because longitudinal studies are lacking. This study examined the effects of neighborhood physical and social environment on longitudinal changes in physical function among Japanese older adults. We analy…
Medicine (16 works) · Muscle activation and electromyography studies (11 works) · Internal Medicine (10 works) · Internal Medicine (10 works) · Physical medicine and rehabilitation (10 works) · Anatomy (9 works) · Anatomy (9 works) · Isometric exercise (8 works) · Electromyography (7 works) · Mathematics (7 works)