I personally don't carry a knife while I'm working out. I've been associated with the fitness industry in one way or another, even coaching at the college level, since the early 90s. I have a knife in a small duffle(SRM 710) nearby with lifting gear (towel, water, chalk, etc). If I happen to be running at night (which is rare as I hate running) I'll have a keltec p32 and a boker escape in a kydex neck rig.
As for the gentleman who confuses preparedness and vigilance with fear...try being mugged a time or two. Try having to draw a pistol and prepare to defend yourself with it. You'll change your tune in a hurry. I've had to draw on someone before. It still bothers me that even though I didn't fire, I had to point a weapon at a human being. There are bad people in thise world, you must be lucky to have lived 42 years and not encountered any.
I was an LEO for 26 years and got to 'point my gun' at many.
I also had 2 shootings in 2 different gyms in this small city.
So since I dont keep the gym bag next to me [ I did at one point while still on the job ].
I wear an ankle rig with a super light Ruger LCP with a laser sight.
Hope I dont even need that,but I am not going to cower and die if attack should come.
mall or gym ninja - not really.
Survivor ,period.
I am sure y'all will do as you please,allow me the same.
btw,back when I was working - the mutts I locked up the night prior were in the gym a few hours later,yes with me.
They are still there and they still remember me !.