letter to the editor: changes in blood lactate levels after a 40-km endurance march depend on fluid replacements: a case study on korean military academy cadets

Dear editor-in-chief for soldiers, surviving the war, increasing their mission capability rates, and physical fitness levels such as endurance, strength, mobility, and flexibility are important (1). in particular, endurance is an important physical fitness factor essential while soldiers perform their missions (1). blood lactate threshold (lt) is an excellent predictor of an individual’s endurance capacity (2); that is, individuals with high fitness levels have high lts.