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Quadriceps weakness can be caused by various injuries to the knee or hips, acquired myopathies (diseases that affect muscle tissue) such as Lyme disease and poliomyelitis, inherited myopathies such as certain muscular dystrophies and stroke, or neurological diseases such as multiple sclerosis or Bellâs palsy.
Quadriceps strain, or a pulled quad muscle is a common injury in sports. As with most muscle strains, it can occur with any activity that requires explosive contraction of the muscles.uadriceps strain, or a pulled quad muscle is a common injury in sports. As with most muscle strains, it can occur with any activity that requires explosive contraction of the muscles.