I have been trying out various treadmills at the clubs I'm going to and I am wondering why I feel like I am gliding on air on some of them while others feel like I'm truding through sand.
I don't just mean cushining but on some treadmills I amd able to easily run my normal 20 minutes at 7.5 or so.
While others I am barley able to get past 10 minutes at 6.5 without feeling like I am going to die.
Just trying to figure out what gives or am I just nuts
