| 查看: 663 | 回复: 11 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
leiyu6788新虫 (小有名气)
|
[交流]
翻译求助
|
||
|
英译汉！麻烦高手们帮忙，谢谢！leiyu6788 leiyu6788 leiyu6788 |
回复此楼» 猜你喜欢
售SCI-T0P文章，我:8O.5.5.1.O.54,科目齐全,可+急
已经有3人回复
-
考博求助
已经有3人回复
-
售SCI一区文章，我:8.O.551.O.5.4,科目全,可伽急
已经有5人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急
已经有4人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急
已经有5人回复
-
售SCI-T0P文章，我:8O.5.5.1.O.54,科目齐全,可+急
已经有9人回复
-
售一区SCI文章T0P，我:8O.551.O54,科目全,可十急
已经有9人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急
已经有10人回复
-
售SCI一区文章，我:8.O.551.O.5.4,科目全,可伽急
已经有6人回复
-
售SCI一区T0P文章，我:8O.55.1.O.54,科目全,可伽急
已经有9人回复
monitor2885
至尊木虫 (知名作家)
队长
- 翻译EPI: 15
- 应助: 6 (幼儿园)
- 贵宾: 0.339
- 金币: 40499.5
- 散金: 147
- 红花: 22
- 帖子: 5126
- 在线: 2195.4小时
- 虫号: 701577
- 注册: 2009-02-15
- 性别: GG
- 专业: 生态系统生态学
10楼2009-08-10 16:34:23
leiyu6788
新虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 2240.3
- 帖子: 154
- 在线: 21.3小时
- 虫号: 733632
- 注册: 2009-03-28
- 专业: 运动系统结构、功能和发育
2楼2009-07-27 17:47:26
Y.F.Zhou
木虫 (著名写手)
- 应助: 1 (幼儿园)
- 金币: 10519.1
- 散金: 1025
- 红花: 1
- 帖子: 1108
- 在线: 236.9小时
- 虫号: 451919
- 注册: 2007-11-05
- 性别: GG
- 专业: 固体力学
3楼2009-07-27 19:38:54
liuth
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 1462.2
- 散金: 2056
- 红花: 1
- 帖子: 502
- 在线: 117.1小时
- 虫号: 515070
- 注册: 2008-02-29
- 性别: GG
- 专业: 光化学和辐射化学
★ ★ ★
telomerase(金币+3,VIP+0):辛苦辛苦！！！ 7-28 09:04
telomerase(金币+3,VIP+0):辛苦辛苦！！！ 7-28 09:04
|
代楼主贴出： Growth of Fitness-Specific Tissues The anabolic actions of growth factors are directed to specific tissues, whose increase in size is important in the development of physical fitness as children grow. In the development of aerobic fitness, increased dimensions of the respiratory and circulatory systems, particularly the heart, are instrumental. Improvements in strength and anaerobic fitness, on the other hand, are expected to be tied more closely to increases in muscle bulk. Growth hormone can profoundly affect the functional capacity of the cardiac, respiratory, and muscular systems in children, as evidenced by observed improvements in physical fitness after its use in clinical settings. Hutler et al. reported the effect of growth hormone treatment on exercise tolerance in 10 prepubertal children with cystic fibrosis (39).The children were randomly assigned to either a control group or a group that received growth hormone treatment for the initial six months and then to the other group for the next six months. Compared with the control condition, growth hor¬mone treatment produced a significant increase in absolute peakVO, (+ 19%), peak ventilation (+ 14%), and peak oxygen pulse (+18%). In this study 71% of the improvement in peak [0, was explained by changes in lean body mass and forced expiratory volume. Cardiac Growth Insights into the effect of growth factors on heart size and function have been derived from animal studies as well as investigations of humans-both children and adults-who have deficiencies of growth factors, particularly deficiencies involving the GH/IGF-I axis. This has been the subject of several reviews (15, 48, 73). There is abundant evidence that both GH and IGF-I stimulate cardiac growth, with associated improvements in both rnyocardial contractility and energy economy. GH also causes peripheral vasodi¬latation, probably via the effect of IGF-I on nitric oxide release. Cardiac size and contractility are depressed in patients with GH deficiency, conditions that resolve with GH treatment. Cittadini et al. found depressed ventricular ejection fraction, cardiac output, and exer¬cise performance in 11 young adults with childhood¬onset GH deficiency (14). In healthy control subjects, ejection fraction rose from 66% to 76% with exercise, while in the GH-deficient patients, little change was seen from a resting value of 54%. After six months of GH treatment, exercise tolerance rose from 7.2 to 9.4 minutes, and resting ejection fraction increased to 61%, while cardiac output responses to exercise became similar to those of the controls. Administration of GH to children with GH defi¬ciency does not stimulate cardiac size or function beyond that paralleling total body growth. Rowland et al. found no differences in left ventricular wall thickness or chamber size when related to body size in echocardiograms of 13 children with GH deficiency who had been treated with GH (mean dose 0.17 IU kg' three times per week) for 13 to 46 months (70). Crepaz et al. compared echocardio¬graphic findings in 22 children ages 3 to 17 years with GH deficiency who were given GH for an average of 14 months (19). Compared with size-matched healthy children, no differences were observed in left ventricular chamber size, wall thickness, contractility, diastolic function, cardiac index, or systemic vascular resistance. |
5楼2009-07-27 21:31:47
