The AMA is urging people to get off the couch this summer and get some exercise instead.
AMA President, Dr Rosanna Capolingua, encouraged people to turn the TV off and instead get themselves or the whole family involved in some exercise these summer holidays.
"The temptation is to use the TV as an easy way to fill in time," Dr Capolingua warned.
"If you or your children spend a lot of time in front the TV it can become a lazy habit or encourage other bad health habits like snacking on junk food.
"When the TV is switched on, your body is switched off.
"Sitting in front of the TV for more than two hours a day can put you at risk of a number of health issues, but physical activity of at least two and half hours a week can help to reduce risks.
"Take advantage of the warm weather and having the family all together to get moving and enjoy some simple exercise together away from the TV."
Dr Capolingua suggested swimming, walking, riding a bike, a game of soccer or cricket, or catching up on gardening as simple ways to get moving.
"A game of backyard cricket or soccer with family and friends is great for everyone's physical health and also helps to release stress and tension," she said.
"Regular physical activity is a cheap and easy way to help prevent a range of diseases including cardiovascular disease (CVD), diabetes, high blood pressure, hypertension, and osteoporosis.
"Physical activity may also provide additional benefits to those already suffering from chronic conditions such as CVD and osteoarthritis."
Dr Capolingua reminded parents that reducing the number of hours their children spend watching TV also reduces their exposure to junk-food advertising.
"Set a good example for your kids. Turn the TV off and start a game they can be involved in.
"You can even turn on some music and get your kids up and dancing.
"Show them exercise doesn't need to be boring and that they can have fun at the same time as they are looking after their health.
"Exercise can also positively affect children's cognitive development, coordination, confidence, and self-esteem and, most importantly, establish positive life-long attitudes towards physical activity."
Dr Capolingua also encouraged parents to think about the effect too many hours in front of computer games could have on their children.
"Computer games, PlayStations and DVDs are common Christmas presents but none of them encourage children to engage in regular physical exercise.
"So these holidays get the whole family involved in some fun physical activity that will be great for everyone's physical health and well-being."