Overall physical activity was associated with reduced odds of having ALS ( Adj OR = 0.65 , 95 % CI = 0.48-0 .89 ) as were work-related physical activity ( Adj OR = 0.56 , 95 % CI = 0.36-0 .87 ) and organized sports ( Adj OR = 0.49 , 95 % CI = 0.32-0 .75 ) .