本研究は，温浴時の海水濃度条件の違いが体温変動，心拍数および主観的温度感覚に及ばす影響を検討するために，38．5℃に設定された水温条件下で15分間入浴および60分間安静の温浴実験をおこなった。海水濃度条件は0％，1％，3．5％，7％の4種類とした。被験者は年齢18～21歳の健康な男子大学生8名であった。被験者の平均の年齢，身長，体重および体脂肪率はそれぞれ19．8±1．0歳，169．2±5．Ocm，57．1±3．1kgおよび14．0±2．6％であった。直腸温は，全条件とも入浴直後から一過性に上昇傾向を示し，出浴後は潜熱現象を示した。海水濃度を比較すると，7＞3．5＞1＞0％の順に有意な上昇傾向を示した。平均皮膚温は，全条件とも入浴直後から10分間は一過性に上昇傾向を示した。その後，入浴10～20分の間はわずかに上昇し，出浴後は10分前後に急速に下降傾向を示し，それ以降はゆるやかな低下を示した。海水濃度を比較すると，7％膿度が他濃度より入浴時の上昇度が高く，またその影響で出浴後の温度低下度も他濃度より低い傾向を示した。平均体温は，全条件とも入浴直後から一過性に上昇傾向を，また出浴直後から急速に下降傾向を示し，その後の回復期にはゆるやかな低下を示した。以上の結果から7％までの海水濃度温浴では，直腸温および皮膚温ともに成分濃度依存性の体温上昇反応が示唆された。The purpose of the present study was to compare thermal responses of the body between bathing in warm sea water and further to examine effects of concentration of chemical components in sea water affect thermal responses of the body when bathing in warm sea water. The thermal responses were based on the examination of taking rectal, skin, and mean body temperatures in bathing and recovery on land. Eight healthy men were the subjects in this experiment, and they were in average 19.8±1.0 in age, 169.2±5.0cms in height, 57.1±3.1kgs in weight, and 14.0±2.6% in fat. The subjects bathed in sea water and fresh water for 15 minutes and took recovery on land for 60 minutes respectively. The experiment was tested under water temperature at 38.5℃ during bathing. The conditions of concentration of chemical components in sea water were 7, 3.5, 1, 0%. For all the subjects, the rectal temperature increased during bathing and decreased gradually during recovery on land. Bathing in sea water statistically showed significant increases of rectal temperature at 15 minutes during bathing. It was constantly higher at 7> 3.5 > 1 > 0%. The mean skin temperature showed a continuous increase during bathing and showed a rapid decrease during 5 minutes in recovery on land, and a gradual decrease after then. No statistically significant differences were detected in the mean skin temperature between 7, 3.5, 1 and 0%. The mean body temperature also showed a continuous increase during bathing and showed a rapid decrease during the 10 minutes in recovery on land, and a gradual decrease after then. In bathing in sea water the mean body temperature statistically showed significant increases during bathing
