na-adjective
Refers to mental or psychological aspects, often in contrast to physical (身体的). The gloss 'physical' is likely an error or a rare usage; the primary meaning is mental/psychological.
心的なストレスが体調に影響することもある。
Mental stress can sometimes affect your physical condition.
彼は心的な問題を抱えているようだ。
He seems to have psychological issues.