Do you believe the NIA's recommendations are out of line with most of what is recommended for senior citizens?
Whether most of what is recommended is stupid is a different question (the answer to that is clearly that it's stupid).
When I do a google search for "exercise senior citizens", the things that I find are consistent with the NIA's nonsense. For example, Jenna Wolfe shares tips, workouts for senior citizens - TODAY.com or Exercise Plan for Seniors