The British Heart Foundation (BHF) said 72% of parents believe their children are "active enough".
The BHF is launching a new national initiative, funding and training 16 new heart failure nurses in the community.
The BHF said it wants the listing of trans fat levels on food labels to be made compulsory.
The BHF also advises 150 minutes of moderate intensity aerobic activity each week.
BBC: Quarter of adults walk just an hour a week, survey finds
The BHF released the findings in its Couch Kids report, which highlights that around one-third of young Scots are overweight or obese.
Even though heart attack deaths in Northern Ireland are decreasing, BHF Northern Ireland says there is little evidence the same is true of heart failure.
Yet the BHF's annual smoking statistics, also released on New Year's Day, indicate that more people worldwide die from smoking than from cancer.
"I can't imagine that both insurance companies would distribute policies through the new bank, " said Volker von Kreuschten of BHF Bank in Frankfurt.
The British Heart Foundation (BHF) advises that moderate intensity aerobic activity is the most effective type of activity for maintaining a healthy heart.
BBC: Quarter of adults walk just an hour a week, survey finds
BHF, its Frankfurt subsidiary, which was once Germany's premier investment bank?
But the BHF added the current shortage of heart surgeons meant taking doctors away from practice to retrain them would have a knock-on effect on the service.
The British Heart Foundation (BHF) called the driving licence pilot "a welcome step forward", but it too is warning that it will not solve the shortage of organs.
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