The number of Americans who were “totally sedentary” last year rose to its highest level since 2007, according to a new survey.

Roughly 83 million Americans age 6 and over, or about 28% of the population, reported that they did not once participate in any of 104 specific physical activities in the last calendar year, according to annual survey results by the Physical Activity Council released Wednesday.

The result is the highest level of inactivity documented by the survey since 2007, when the council rejiggered its parameters for physical activity to exclude things like darts and billiards.

“We feel confident, in a sad way, that this is the largest number we’ve ever seen,” said Tom Cove, chief executive of the Sports and Fitness Industry Association, which is one of the members of the council. Mr. Cove said the number of inactive Americans is the highest he has seen in his more than 24 years involved with the survey.

The number of totally sedentary Americans has risen 18% since 2007, while the percentage of the total inactive population age 6 and over has grown by three percentage points over the same period.