Table 2. Swimming exercise for additional normoxic training in all participants. Sessions Exercise program Warm-up 400 m slow and easy, working on your water feel. Alternating Freestyle and Backstroke, 50 m each. Drills 4 × 50 Freestyle only leg kick without kickboard breathing frontally, 30 sec rest in between. 4 × 50 breaststroke only leg kick without kickboard breathing frontally, 30 sec rest in between. Main set 1250 m Pyramid: 50, 100, 150, 200, 250, 200, 150, 100, 50 All Freestyle, medium steady pace, 5 - 8 slow deep breath rest in between, You can take a longer (3 min) break and have a drink after reaching 250 top level 200 m Backstroke swim down Swim down 350 m kickboard, 200 deep Freestyle leg kick, 150 long deep breaststroke kick Total 2.6 km