Decreasing Alzheimer's Risk Through oNline Choreographed Exercise - Down Syndrome

The investigators are assessing acceptability, appropriateness, and feasibility of an remote choreographed exercise intervention using validated scales alongside qualitative data among young adults with Down Syndrome. Participants will take part in a 12-week exercise program with two 35-minute session per week delivered in a group setting. The aims of the project are to: * Assess the feasibility of a 12 week remotely delivered group dance intervention. * Assess changes in aerobic fitness and cognitive function in response to a 12 week remotely delivered group dance intervention. * Assess the intensity and total energy expenditure of remotely delivered group dance sessions.