This session on Monday followed a day of rest on Sunday. Rowed 5 HIITs : 2 X 20 strokes, felt nausea coming on, reduced to : 3 X 15 strokes . Had bout of nausea on #5. Finished with 1.7 K at normal pace. Believe HITT session must be 3 X per week maximum with resting or normal pace in alternative days.