کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4972007 | 1450704 | 2018 | 5 صفحه PDF | دانلود رایگان |
کلیدواژگان
1.مقدمه
2.روشها و مواد
1.2 طراحی پژوهش و تنظیمات
2.2 شرکتکنندهها
جدول 1. دادههای دموگرافیک وفیزیکی شرکتکنندهها (n-8)
3.2. پروتکل آزمایشی
تصویر1. نردیان کشف Cosmo H/P قبل و بعد از اصلاح
4.2 تحلیل آماری
تصویر 2. پایه VO2میانه به تغییر در زاویه نردبان * نشان دهنده اهمیت است.
جدول 2. اندازه های تاثیر برای تغییر زاویه نردبان در Vo2و HR
تصویر 3. پایه میانه HR به تغییر در زاویه نردبان& نشان دهنده اهمیت است.
3.بحث و تبادل نظر
1.3محدودیتها
2.3 نشانه های پژوهش و جهت گیریهای پژوهشهای آنی
4.نتیجه گیری
- A ladder ergometer was modified from 75° to 90° to assess the effect of pitch.
- VËO2, Heart Rate (HR) and RPE were measured at three speeds to assess this effect.
- Ladder ergometer climbing at 90° v. 75° significantly increases HR, VËO2 and RPE.
- Vertical climbing shifts the body's centre of mass beyond its base of support.
This study aimed to assess whether modifying the pitch of a 75° ladder ergometer to vertical had a cardiorespiratory or psychophysical effect on climbing. Nine male participants climbed a ladder ergometer at 75° and subsequently at 90°, adjusted for an equivalent vertical climb rate, completing three climbing bouts at different vertical speeds. One participant dropped out being unable to complete the climb under the 90° condition. Each was monitored for heart rate (HR), VËO2 and rating of perceived exertion (RPE). Results showed vertical climbing induced higher VËO2 (mean increase 17.3%), higher HR (mean increase 15.8%), and higher RPE at all speeds and that moving from 75°to vertical exacerbates the effect of speed on the cardiorespiratory response to climbing. This may be explained by increased force production required to maintain balance in a vertical climbing position when the body's centre of mass is not above the feet.
Journal: Applied Ergonomics - Volume 66, January 2018, Pages 172-176