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Respiratory alterations during discr...

Lamberg, Eric Michael.

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Respiratory alterations during discrete lifting.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Respiratory alterations during discrete lifting./
作者:	Lamberg, Eric Michael.
面頁冊數:	66 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-01, Section: B, page: 0235.
Contained By:	Dissertation Abstracts International66-01B.
標題:	Health Sciences, Recreation. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3160594
ISBN:	9780496939343

Respiratory alterations during discrete lifting.
Lamberg, Eric Michael.

Respiratory alterations during discrete lifting. - 66 p.

Source: Dissertation Abstracts International, Volume: 66-01, Section: B, page: 0235.

Thesis (Ed.D.)--Columbia University Teachers College, 2005.

During seated lifting tasks, force application and postural adjustments occur in anticipation of an object's weight. It is not known how the respiratory system (volume and intra-abdominal pressure (IAP)) responds when variable demands on trunk stability are introduced. In experiment I, 14 subjects (6 had IAP measured) sat without trunk support and lifted two bottles that co-varied in size and weight (255g and 1550g). In experiment II, trunk stability was maximized through use of a backrest and harness in an additional 14 subjects (6 had IAP measured). We hypothesized that the volume and IAP would increase when the stability demands imposed by the lift increased. However, during experiment II these modifications would be reduced. During experiment I, following consecutive trials with the same object both the volume and IAP were higher at the onset of lifting the heavier object. In contrast, during experiment II, neither the volume nor the IAP were higher for the heavier object. Following a transition (i.e. a lift with the heavier object immediately after a lift with the lighter object or visa versa), IAP was scaled to object weight but volume was not. Furthermore, we found that the overall IAP measures were higher during experiment I than II. Together these results suggest that IAP increased during conditions requiring additional trunk stability and that volume may be one mechanism used to achieve higher IAP.

ISBN: 9780496939343Subjects--Topical Terms:

1018003
Health Sciences, Recreation.

Respiratory alterations during discrete lifting.
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502 $a Thesis (Ed.D.)--Columbia University Teachers College, 2005.
520 $a During seated lifting tasks, force application and postural adjustments occur in anticipation of an object's weight. It is not known how the respiratory system (volume and intra-abdominal pressure (IAP)) responds when variable demands on trunk stability are introduced. In experiment I, 14 subjects (6 had IAP measured) sat without trunk support and lifted two bottles that co-varied in size and weight (255g and 1550g). In experiment II, trunk stability was maximized through use of a backrest and harness in an additional 14 subjects (6 had IAP measured). We hypothesized that the volume and IAP would increase when the stability demands imposed by the lift increased. However, during experiment II these modifications would be reduced. During experiment I, following consecutive trials with the same object both the volume and IAP were higher at the onset of lifting the heavier object. In contrast, during experiment II, neither the volume nor the IAP were higher for the heavier object. Following a transition (i.e. a lift with the heavier object immediately after a lift with the lighter object or visa versa), IAP was scaled to object weight but volume was not. Furthermore, we found that the overall IAP measures were higher during experiment I than II. Together these results suggest that IAP increased during conditions requiring additional trunk stability and that volume may be one mechanism used to achieve higher IAP.
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