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"私は腹筋運動の回数を数えていません。痛みが始まる時だけ数えます。なぜなら、それが唯一数えるべきものだからです。"
Muhammad Ali
Related Topics
Fitness
Motivation
Endurance
Training
Exercise
Pain Threshold
Perserverance
Sit-ups
Strength Training
Workout Motivation
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