ACTIVITY 5
This is Hidilyn Diaz. She won the Philippines’ first ever Olympic gold medal in the clean and jerk weightlifting category for the 55-kg weight division during the 2020 Tokyo Olympics. Give 5 examples of muscles with isotonic contractions and 5 examples of muscles with isometric contractions during the activity in the gif below.
https://tenor.com/view/hidilyndiaz-olympics-seeusstronger-weightlifting-gif-22479175
ISOTONIC CONTRACTIONS - the tension (force of contraction) developed in the muscle remains almost constant while the muscle changes its length. It can can be concentric isotonic contraction or eccentric isotic contraction.
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Hamstrings (concentric)
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Rectus femoris (eccentric)
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Gluteus maximus (concentric)
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Adductor magnus (concentric)
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Quadriceps femoris (eccentric)
ISOMETRIC CONTRACTIONS - the tension generated is not enough to exceed the resistance of the object to be moved, and the muscle does not change its length.
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Rectus abdominis
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Trapezius
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Deltoids
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External obliques
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Latissimus dorsi