What do you think of his reasoning?!
Question: What do you think of his reasoning?
Answers:
If the cough has just come on in the past few days and he feels well enough to exercise then its nothing serious. Let him go to the gym if it makes him happy.
I doubt it will be helping at all but most coughs are viral and just have to run their course. So if he refuses to rest don't nag him, you're not his mother, just let him get on with it. Men hate being nagged and usually do the opposite of what you want them to do just for the sake of it.
If he's sick, going to the gym can be one of the worst things for him. Gym's contain huge amounts of bacteria and germs, and are easier to catch when your immune system is down. I can understand that working out may take his mind off the cough or sickness, but he should really take some cough medicine and let his immune system recover.
He's a guy and he doesn't want to listen to you because of his ego, we all have one. Let him go and lay in he bed he made. He loves that you are concerned about him though. He will take the rest you told him to take and that which he knows he needs when he thinks thats you won't know about it.
Let him go. When the other guys see him coughing all over the place, they'll send him back.