so let's say you have a forty pound dumbbells fifty pound dumbbells sorry the first exercise was the walk then you would go to the deep end of the pool he would leave the 50s he would swim up you would catch your breath and then when you felt strong you would swim down and do as many as many curls as you could underwater holding your breath and then you would swim up to get a breath go down and do another set and then you do as many shoulder presses as you could