Am I being overly sensitive?

My husband works as a mail carrier. He is a very active man walking 15 miles a day for work. He also really enjoys any kind of physical activity.

Recently he has stated that he needs his partner to be more physically fit. He would like me to do more activities with him such as hiking, skating, and Frisby golf.

I have no interest or desire to do these things. I can't keep up with him and by the end of any of them my self esteem is laying on the ground. He thinks that if I really love him I would put in more of an effort.

Now I feel like he no longer finds me attractive.