Gambling addicts should be encouraged to list what makes them happy, what they enjoy or find fun aside gambling.
They could be asked to replace the gambling with the list. The fun experiences can be developed for them assuming they are undergoing a therapy.
Well that's amother approach to it. Working out probably gets mentioned a lot because it's a physical activity. Huffing and puffing your lungs out can take away other thoughts so it is a good alternative but only for those who are interested. There are also a lot of physical activities not limited to working out like going outdoors. For me that's a more entertaining way of keeping yourself from sitting at a gambling table. One thing is for sure, it's easier if the addicted gambler has a solid support group like close friends and family.