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voice mechanism
loud & long speak is bad
hydration is important
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Rebound knee, back knee, hyperextended knee
Quadriceps training
Shoes, insole
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・Specific / Non Specific low back pain
・Non Specific → intervertebral disc, facet joint, muscle or myofascial
・Posture / Flexibility
・Stretching / Exercise
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・conさん's self introduction
・freelance work
・vocal hygiene
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Yuto Tashiro/physical therapist・Athletic trainer