463 resultados para Bicycle helmet


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"ITEP is a three year program. Projects funded through the Illinois Transportation Enhancement Program include: scenic/historic highways; historic transportation structure rehabilitation; pedestrian and bicycle facilities; landscaping; transportation museums; outdoor advertising control."

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What is man?--The death of Jean.--The turning point of my life.--How to make history dates stick.--The memorable assassination.--A scrap of curious history.--Switzerland, the cradle of liberty.--At the Shrine of St. Wagner.--William Dean Howells.--English as she is taught.--A simplified alphabet.--As concerns interpreting the Deity.--Concerning tobacco.--The bee.--Taming the bicycle.--Is Shakespeare dead?

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"Music for plays", p. 433-447.

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(head shot in uniform and helmet)

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[Michiganensian caption: "Ozzie Clark brings down Ohio ball carrier. Tape around sleeves and over helmet helmets kept out cold wind and snow which fell during entire game."]

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[Derricotte is wearing a leather helmet with a face mask, possibly first face mask on a UM helmet.]

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(posed on field, in jersey holding helmet)

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[earliest known image of a U-M hockey player wearing a helmet.]

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A Japanese tank and bicycle in an anti-tank ditch, with destroyed fortifications in the background. Caption; "Japanese Lt. Tank in anti-tank ditch."

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Latest issue consulted: Vol. 22-no. 24, number 570 (Jan. 26, 1899); title from cover.

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Thesis (Master's)--University of Washington, 2016-06

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Thesis (Master's)--University of Washington, 2016-06

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Thesis (Master's)--University of Washington, 2016-06

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Purpose: Although manufacturers of bicycle power monitoring devices SRM and Power Tap (PT) claim accuracy to within 2.5%, there are limited scientific data available in support. The purpose of this investigation was to assess the accuracy of SRM and PT under different conditions. Methods: First, 19 SRM were calibrated, raced for 11 months, and retested using a dynamic CALRIG (50-1000 W at 100 rpm). Second, using the same procedure, five PT were repeat tested on alternate days. Third, the most accurate SRM and PT were tested for the influence of cadence (60, 80, 100, 120 rpm), temperature (8 and 21degreesC) and time (1 h at similar to300 W) on accuracy. Finally, the same SRM and PT were downloaded and compared after random cadence and gear surges using the CALRIG and on a training ride. Results: The mean error scores for SRM and PT factory calibration over a range of 50-1000 W were 2.3 +/- 4.9% and -2.5 +/- 0.5%, respectively. A second set of trials provided stable results for 15 calibrated SRM after 11 months (-0.8 +/- 1.7%), and follow-up testing of all PT units confirmed these findings (-2.7 +/- 0.1%). Accuracy for SRM and PT was not largely influenced by time and cadence; however. power output readings were noticeably influenced by temperature (5.2% for SRM and 8.4% for PT). During field trials, SRM average and max power were 4.8% and 7.3% lower, respectively, compared with PT. Conclusions: When operated according to manufacturers instructions, both SRM and PT offer the coach, athlete, and sport scientist the ability to accurately monitor power output in the lab and the field. Calibration procedures matching performance tests (duration, power, cadence, and temperature) are, however, advised as the error associated with each unit may vary.

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Elevated plasma homocysteine is recognized as an independent risk factor for cardiovascular disease. Recently, there have been conflicting reports of the relationship between physical activity and homocysteine. A more objective measure of physical activity is cardiorespiratory fitness; however, its relationship with homocysteine has yet to be investigated. The aim of this study was to determine the relationship between cardiorespiratory fitness and plasma homocysteine. Cross-sectional associations between cardiorespiratory fitness (VO(2)max) and plasma homocysteine were examined in 49 men and 11 women. A submaximal bicycle test was used to determine VO(2)max and plasma homocysteine was measured using high performance liquid chromatography with fluorescence detection. Dietary analysis determined B vitamin intake. There was a significant inverse relationship between plasma homocysteine concentration and VO(2)max in women (r = -0.81, P = 0.003) but not in men (r = -0.09, P = 0.95). There were no significant relationships between plasma homocysteine and age, BMI, body fat, total cholesterol, and LDL cholesterol. In summary, elevated cardiorespiratory fitness is associated with decreased plasma homocysteine concentrations in women. (C) 2004 Elsevier Inc. All rights reserved.