Mr Biden last summer began using a continuous positive airway pressure, or CPAP, machine at night to tackle sleep apnea, the report noted. The physician also found that the president suffers from a stiffened gait but it did not worsen from his last examination, besides “possibly tighter hamstrings and calves”. An “extremely detailed neurologic exam” found no evidence of a stroke or Parkinson’s. Mr Biden also underwent a routine skin cancer surveillance. The president “had several localised, non-melanoma skin cancers removed” before the start of his term in office, the memo added.