 Bradley 's basketball ability benefited from his height — 5 ' 9 " in the 7th grade , 6 ' 1 " in the 8th grade , and his adult size of 6 ' 5 " by the age of 15 — and unusually wide peripheral vision , which he worked to improve by focusing on faraway objects while walking . During his high school years , Bradley maintained a rigorous practice schedule , a habit he carried through college . He would work on the court for " three and a half hours every day after school , nine to five on Saturday , one @-@ thirty to five on Sunday , and , in the summer , about three hours a day . He put ten pounds of lead slivers in his sneakers , set up chairs as opponents and dribbled in a slalom fashion around them , and wore <unk> frames that had a piece of cardboard taped to them so that he could not see the floor , for " a good dribbler never looks at the ball . " 
