اثر تعاملی کافئین و کانون توجه بر ثبات قامتی افراد با سطوح متفاوت فعالیت جسمانی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار رفتار حرکتی، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران

2 .کارشناسی ارشد رفتار حرکتی، دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه خوارزمی، تهران، ایران

3 .استادیار رفتار حرکتی، دانشکدۀ تربیت بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران

چکیده

هدف از این پژوهش تعیین اثر تعاملی کافئین و کانون توجه بر ثبات قامت افراد با سطوح متفاوت فعالیت جسمانی بود. 20دانشجوی پسر براساس پرسشنامۀ بین‌المللی فعالیت بدنی به دو گروه مساوی پرتحرک و کم‌تحرک تقسیم شدند. نوسانات قامتی آنها طی دو کوشش30ثانیه‌ای با 1 دقیقه استراحت بدون هیچ‌گونه مداخله‌ای در پیش‌آزمون و در دو شرایط کانون توجه درونی (توجه به اندام تحتانی) و بیرونی (تمرکز روی نقطه دیوار روبرو) از دستگاه سکوی نیرو جمع‌آوری شد. در روز دوم آزمایش به آزمودنی‌های هر دو گروه معادل 5 میلی‌گرم به ازای هر کیلوگرم از وزن بدن کافئین داده شد و پس از 30 دقیقه آزمون ثبات قامت تحت دو شرایط توجه درونی و توجه بیرونی به‌عمل آمد. نتایج تحلیل واریانس مکرر در سطح آلفای 05/0، نشان داد که نوسانات قامتی هر دو گروه‌ در شرایط کانون توجه درونی و بیرونی افزایش معنا‌داری یافته است. همچنین، مداخلۀ کافئین موجب افزایش معنا‌دار نوسانات قامتی دو گروه‌ در شرایط توجه درونی و بیرونی شد. همچنین، افراد پرتحرک در مقایسه با کم‌تحرک نوسانات قامتی کمتری در شرایط مختلف از خود نشان دادند. صرف‌نظر از کانون توجه اتخاذشده، کافئین احتمالاً با تأثیر بر سیستم سمپاتیک و افزایش انقباضات و لرزش عضلانی موجب نوسانات بیشتر قامت در هر دو گروه با سطح متفاوت فعالیت جسمانی می‌شود. در پژوهش‌های آینده باید به عواملی چون تفاوت‌های فردی در پاسخ به مصرف کافئین یا تأثیر آن بر تکالیف توأم با آشفتگی‌های قامتی توجه شود.

کلیدواژه‌ها


عنوان مقاله [English]

Interactive Effect of Caffeine and Attention Focus on Postural Stability of Individuals with Different Levels of Physical Activity

نویسندگان [English]

  • saeed arsham 1
  • arash saidi 2
  • farhad ghadiri 3
1 Assistant Professor of Motor Behavior, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
2 MSc of Motor Behavior, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
3 Assistant Professor of Motor Behavior, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
چکیده [English]

The aim of this study was to determine the interactive effect of caffeine and attention focus on the postural stability in subjects with different levels of physical activity. 20 male students were divided into two equal groups (physically active and inactive) by the international physical activity questionnaire. Their postural sways were gathered from a force plate system during two 30-second trials with a 1-minute rest interval with no interventions in the pretest and in internal attention focus (attention to the lower extremity) and external attention focus (attention to a point on the front wall) conditions. On the second day of the experiment, subjects in both groups received 5 mg of caffeine per kg of body weight and the postural stability test was conducted under internal and external attention focus conditions after 30 minutes. The results of ANOVA with repeated measures at α=0.05 showed significant increases in the postural sways of both groups in internal and external conditions. Also, the caffeine intervention significantly increased the postural sways of both groups in internal and external conditions. Furthermore, active subjects showed less postural sways in different conditions than the inactive group. Regardless of the focus of attention, caffeine causes more postural sways in both groups with different levels of physical activity through affecting the sympathetic system and increased muscle contractions and tremor. In future studies, other factors such as individual differences in response to caffeine intake or its effect on tasks along with postural disturbances should be considered.

کلیدواژه‌ها [English]

  • Active
  • caffeine
  • center of pressure
  • external attention
  • inactive
  • internal attention
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