Introduce yourself and before you start walking, check if anyone has any ailments other than what was stated on the form they completed
If they have any, politely ask them to please proceed home and return 1 week after completing their meds course.
They won’t be missing out.
Engage them constantly with small talk to distract them
Most of them have not walked more than two kilometres in a while
The distance covered will be 5km, so don’t mention the distance to them
Monitor them constantly by moving back and forth in the group, and place your faster walkers in the back of your group in the second half of your walk.
As said above, monitor them constantly and check in on them to see if they are ok.
You have to check in on them yourself, some hajjis are shy and won’t speak up