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  • 1990-1994  (3)
  • 1985-1989
  • Fatness  (2)
  • Chemical Engineering  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Brisk walking improves endurance fitness without changing body fatness in previously sedentary women (1992)
    Springer
    European journal of applied physiology 65 (1992), S. 354-359 
    Details
    ISSN: 1439-6327
    Keywords: Walking ; Women ; Endurance fitness ; Fatness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of this study was to examine the influence of brisk walking on endurance fitness and the amount and distribution of body fat in previously sedentary women. Twenty eight women [mean age (SEM): 44.9 (1.5) years] followed the walking programme for 1 year, whilst 16 acted as controls [age 44.4 (2.3) years]. Changes in endurance fitness were evaluated by measuring the oxygen uptake ( $$\dot VO_2 $$ ) at a reference blood lactate concentration of 2 mmol · 1−1 . Two 1.61-km field tests of walking were completed, one at maximal speed and one at a “brisk” speed, as well as a 1.61-km walk on a motorised treadmill. The amount and distribution of body fat was determined by hydrostatic weighing and anthropometry and energy intake was evaluated using the 7-day weighed food intake method. Walkers completed an average of 157 min·week−1 of brisk walking over the year. The following were increased in walkers, relative to controls: brisk walking speed [walkers 1.73 (0.05) m·s−1 vs 1.88 (0.07) m·s {−1}; controls 1.69 (0.05) m·s−1 vs 1.70 (0.05) m · s −1 at baseline and 12 months respectively,P〈0.01], maximal walking speed and $$\dot VO_2 $$ at 2 mmol·1−1. In addition, brisk walking reduced heart rate and blood lactate concentration during stepping as well as during standard, submaximal treadmill walking. It did not modify either the amount or the distribution of body fat, despite an unchanged energy intake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00868140
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of a 1-year programme of brisk walking on endurance fitness and body composition in previously sedentary men aged 42–59 years (1994)
    Springer
    European journal of applied physiology 68 (1994), S. 531-537 
    Details
    ISSN: 1439-6327
    Keywords: Walking ; Men ; Endurance fitness ; Fatness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study examined the influence of a 1-year brisk walking programme on endurance fitness and the amount and distribution of body fat in a group of formerly sedentary men. Seventy-two males, aged 42–59 years, body mass index 25.2 (0.3) kg·m−2 [mean (SEM)], were randomly allocated to either a walking group (n = 48) or control group (n = 24). Brisk walking speed was evaluated using a 1.6-km track walk. Changes in endurance fitness were assessed by measuring blood lactate concentration and heart rate during submaximal treadmill walking. Body composition was determined by hydrostatic weighing and anthropometry; energy intake was assessed from 7-day weighed food inventories. Differences in the response of walkers and controls were examined using two-way analyses of variance. Forty-two walkers (87.5%) completed the study and averaged 27.9 (1.4) min·day−1 of brisk walking (range 11–46). Brisk walking speed averaged 1.95 (0.03) m·s−1 and elicited approximately 68 (1) % of maximum heart rate. Heart rate and blood lactate concentration during submaximal treadmill walking were significantly reduced in the walkers after 3, 6 and 12 months and the oxygen uptake at a reference blood lactate concentration of 2 mmol·l−1 was increased by 3.2 ml·kg−1. min−1 (14.9%) in the walkers at 6 months (P〈 0.01). Although skinfold thicknesses at anterior thigh and medial calf sites decreased significantly for the walkers, the response of the two groups did not differ significantly for other body composition variables or for energy intake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00599525
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Isothermal volume relaxation in aged polycarbonate measured by positron annihilation lifetime spectroscopy (1990)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 30 (1990), S. 762-768 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The positron annihilation lifetime spectroscopy (PALS) technique is used to measure volume relaxation in physically aged glassy polycarbonate. The relaxation times and activation energy calculated for the isothermal relaxations in the aged polycarbonate are greater than those parameters calculated for unaged polycarbonate. The activation energy of 8.2 kcal/mol in the aged polycarbonate is used to identify the phenyl group motion or the cooperative carbonate-phenyl interaction as the molecular features responsible for the thermally induced open volume relaxations. It is postulated that the open volume relaxation kinetics as measured by PALS can be used as a nondestructive indication of property differences between aged and unaged polycarbonate.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760301303
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    Paper (German National Licenses)
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