From the ISW:
"The Russian military appears to be increasingly recruiting older Russian volunteers in order to sustain ongoing crypto-mobilization efforts. Russian opposition outlet Verstka reported on October 9 that a source in an unspecified Russian Airborne (VDV) unit operating in the Kherson direction stated that 40 percent of the unit's contract recruits and mobilized personnel are over 50 years old and that over 75 percent of new personnel are over 50 years old."
Sounds desperate on the surface of it, but there's practicality involved.
The VDV sees itself as an elite unit, and whatever one may think about that claim, VDV units do consistently perform better than regular army units. Consequently the VDV has been worked hard and primarily deployed into situations where Ukraine was launching offensives, as well as having taken significant losses during operations like the attempted capture of Hostomel Airport.
As a result the VDV must have lost a significant number of its pre-invasion personnel, and due to various mistakes (using up training battalion personnel to delay mobilization was really, really, really dumb) made by Russia as well as how many regular army units are treated there's not really that much feedstock available for replenishment from current serving personnel.
VDV brass may have decided that beggars can't be choosers, and that when given the choice of older, experienced former VDV personnel and whatever they could induct from the regular army experience and known personalities (in an army like the Russian one you can't trust most personnel files; talking up problem soldiers in order to promote them into someone else's problem is a time-honored tradition) would be worth the loss of physical fitness.