Jamirok,
I agree eyes don’t cut it, although I don’t train a massive amount of athletes. Just a visual on body language. Love to PM you if ok with a few questions. Unfortunately, I don’t get to control my players conditioning when season starts. I get them fit and prepped, then they get smashed in camp by coaches who have no clue what recovery looks like. They treat it as though the body can endlessly endure whatever they throw at them, and if they don’t peform, they are out of shape or lazy. The life of a private athletic prep coach.