books rebound when running and jumping
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# The physiology of jumping and jumping
# Physiology of jumping and jumping competitions
# Jumping and jumping in the male
# Jump and jump activities
# How do I breathe while running?
# Running and running competitions
# Suicides by jumping from heights
# Ski jumping in Austria
# Ski jumping in Norway
# Ski jumping in Czechoslovakia
# Ski jumping in Germany
# Ski jumping in Russia
# Ski jumping in Canada
# Ski jumping in Finland
# Ski jumping in Japan
# Ski jumping in France
# Jumping suicide in Turkey
# bungee jumping
# List of jumping activities
# platform jumping gymnastics
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Source: wikipedia.org
ارتداد عند الجري والقفز (Info)
عضلات جسم الإنسان والحيوان مرة وهي تعمل بتقلصها ثم انفرادها، فعند القفز مثلا يدفع الإنسان الأرض بقدمه إلى الخلف فيندفع إلى الأمام أو عاليا. هذا من الارتداد. كذلك عندما يوجه الملاكم لكمة إلى رأس غريمه فإنها ترتد بشدة وقد تصيبه بالضربة القاضية.
