مقایسه نقطه شکست ضربان قلب به روش Dmax.S با آستانه تهویهای در مردان غیرفعال

نوع مقاله : علمی - پژوهشی

نویسندگان

گروه تربیت بدنی و علوم ورزشی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

هدف:هدف از این پژوهش بررسی ارتباط بین نقطه شکست ضربان قلب )HRDP )با استفاده از مدل کوتاه بیشترین فاصله )Dmax.S)
با دومین آستانه تهویهای )VT2 )بود.
روشها: بیست و یک نفر مرد غیرفعال داوطلب )با میانگین سن 31/1±9/19 سال، قد 3/5±4/173 سانتیمتر، وزن 9/8±9/67
کیلوگرم، اکسیژن مصرفی بیشینه 52/0±08/3 لیتر بر دقیقه( آزمون ورزشی فزاینده نوارگردان را تا رسیدن به واماندگی اجرا کردند.
برای تعیین HRDP ،ضربان قلب آزمودنیها بهوسیله دستگاه پوالر ثبت و با استفاده از برنامه رایانهای طراحیشده آنالیز شد. گازهای
تنفسی در طول آزمون فزاینده توسط دستگاه گاز آناالیزر اندازهگیری شد. از آزمون t وابسته، مدل گرافیکی بالند-آلتمن و روش
آماری همبستگی درونخوشهای (ICC (برای پردازش دادهها استفاده شد.
نتایج: HRDP در تمامی آزمودنیهای این پژوهش مشاهده شد. تفاوت معناداری بین متغیرهای ضربان قلب، اکسیژن مصرفی،
تهویه، حجم جاری و تواتر تنفسی مطابق با HRDP و VT2 وجود نداشت )05/0<P .)همچنین نتایج آزمون ICC و نمودارهای بالند-
آلتمن نشان داد که همگرایی باالیی بین ضربان قلب و اکسیژن مصرفی اندازهگیریشده در HRDP و VT2 وجود دارد.
نتیجهگیری: با توجه به نتایج این تحقیق، میتوان نتیجه گرفت که Dmax.S روش مطمئنی برای جانشینی روشهای تهاجمی،
پرهزینه و وقتگیر است. بنابراین، میتوان از روش Dmax.S برای تعیین آستانه بیهوازی در مردان جوان سالم استفاده کرد.

کلیدواژه‌ها


عنوان مقاله [English]

A comparison of the heart rate deflection point by the S.Dmax method and the ventilatory threshold in sedentary men

نویسندگان [English]

  • Mehdi esbarzadeh
  • Marefat siahkouhian
  • Lotfali bolboli
Department of Physical Education & Sport Science, School of Education and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Purpose: The aim of this study was to survey of the relationship between heart rate deflection point (HRDP)
by the short distance maximum (S.Dmax) and second ventilatory threshold (VT2).
Methods: Twenty-one sedentary men volunteers (mean age 19.9±1.31 years; height 173.4±5.3 cm; weight
67.9±8.9 kg; maximum oxygen uptake 3.08±0.52 L.min-1
) performed an incremental treadmill exercise test to
exhaustion. To determine the HRDP, each subject heart rate was recorded by using a polar monitor and
analyzed by a designed computer program. Respiratory gases during the exercise test was measured with a
gas analyzing system. Data were analyzed using depended t-test, Bland and Altman plots and intraclass
correlation coefficient.
Results: The HRDP was noticed in all subjects. No significant difference (p > 0.05) between the heart rate, oxygen
uptake, ventilation, tidal volume and respiratory rate corresponding to HRDP and VT2. Also, results of ICC and
Bland-Altman plots showed a good agreement between HR and VO2 measured at the HRDP and VT2.
Conclusions: It could be concluded that S.Dmax method is an accurate and reliable alternative to the expensive
and time-consuming invasive methods. Therefore, the S.Dmax method can be used for the determination of
anaerobic threshold in healthy young men. 

کلیدواژه‌ها [English]

  • Keywords: Anaerobic threshold
  • Heart rate deflection point
  • S.Dmax method
  • Second ventilatory threshold
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  • تاریخ دریافت: 20 بهمن 1394
  • تاریخ بازنگری: 08 بهمن 1395
  • تاریخ پذیرش: 03 اسفند 1395
  • تاریخ اولین انتشار: 01 بهمن 1397
  • تاریخ انتشار: 01 بهمن 1397