surely this isnt a capricorn trait?

now this is one seriously annoying but partially good habit of my capricorn man. He is 41, but looks about 35, about as vain as you can get and is now completely obsessed with the gym. When we first went out apparently he was never into the gym like he is now, he was in fact 2 stone heavier than he is now. We are talking not really eating well, feels guilty after chocolate, always comments on what he needs to burn after eating food and we are verging on serious addiction here. So per night he burns approx 1300 calories, almost everynight, where now he is 2 stone lighter in 6 months.
He looks good but I feel he needs to put on more weight. For instance now as I am working he is at the gym, when he doesnt see me at night he is at the gym.......we are going on holiday next week and he said "Jo, seriously we need to run, go to the gym out there, play tennis and go for walks, I am not going out there doing nothing!"

Well I felt under pressure here, I feel holidays are for relaxing and not 24/7 working out......I know for a fact while he is out there doing I will be lazing around reading, but then when I am not with him I feel guilty for not going myself, so feel I should whe I am with him instead of going at my own leisure...is this right?

I have never known it to be so addictive....but we are talking burning like its giving him a high, like my mum says, he is so hyper and cant seem to just chill out and relax......he has moon in gemini and is a horse chinese horoscope.....not sure if that has anything to do with it.....or, the fact he doesnt drink anymore as he use to all the time...and perhaps this is a substitute thats what we are all thinking here—?

any ideas?
i just want to enjoy my holiday
xx