Hi, Quinny-
Like you, my husband has ALS. And, like your husband he was also an active man- playing sports in school, physically active as an adult. (although, not to the extreme your husband seems to be)
But, he had been working out 6 days/week (swimming 3/week & weights 3/week) when he was diagnosed 2 1/2 yrs. ago. He would also bike ride on weekends on park trails (25miles), but had to stop this because he just couldn't do it any longer.
At our ALS clinic, the PT & OT did encourage him to cut WAY back, if not stop. Interestingly though, our neuro didn't push that. He just said, don't over fatigue your muscles, but do what you can.
It was very difficult for him to give up his routine (thinking the same thing i.e. "use it or lose it") and while he quickly had to give up wt. training on his legs, it was a gradual process for his upper body wts. - gradually decreasing the amount of wt. until he got to the point where he said it didn't seem worth it, so I said "quit". It was also becoming difficult to go to the gym 6 days- he was getting tired. But, he loved to swim, so he chose to continue that, 3/week. He would do 2miles (nonstop) in 30 min (for non-swimmers, that is pretty good!), then slowed to 40-45min., then decreased his distance.
All of this was very hard for him to let go of- and when women & guys he use to beat in the pool started to beat him, his competitive side really felt defeated. It was a slow process of him coming to terms with the disease- what it was taking from him. It takes time, and I think every person has to do that in their own way. And you must trust he will realize when he has to cut down his activities, and even give them up all together.
You both are still early in this process- a wise CALS once told me "that first year is tough"; so true! So, give him time. He will eventually cut back if only due to the fact he won't be able to do those things due to weakness.
As for finding other things to do (transition to a different way of life), that will be for him to decide. You can offer suggestions, and they can even be things you do together, but ultimately, it is his choice.
It is similar to when a person retires (particularly if it is a forced retirement)- some struggle at first to find things to fill their time. But I will say this- it is a different way of life for BOTH of you! You will both need to adapt.
My husband is a great reader; some love to be on the computer doing whatever they do on a computer (!). You could get books of crossword puzzles or Suduku puzzles- just have them around for him to pick up occasionally.
Recently, I got Jim an iPad. He didn't think he wanted one just yet, but he loves it! Gets his email, does his computer stuff (which he does more of with this), downloads games for our granddaughter (which he enjoys as much as her).
He downloads lots of books & reads this way now. (didn't think he would like that- likes holding a book, the tactile property) But, loves the iPad & says it is so much easier to hold than a book. It is backlit, so no lamp on when he is reading at night & I'm trying to sleep. OK, I digress!
The point is: as much as we love our husbands, want to help them in any way, want only the best for them, and hate to see them struggle with this- it is their choice & their decision. A very wise forum member wrote something that really gave me insight; he said: (PALS need) "...support not guidance; love not lectures; a helping hand & not a steering wheel."
Write those words down and refer to them often. You will be surprised how often you can apply the meaning of those words to the struggles you will face. I know I do (thanks, trfogey!)
By the way, Jim is still swimming 3/week. He is down to a mile, 50min. in the pool.
He can no longer kick, so it is all arm work, which is good for stretching & ROM.
15min. is spent stretching at the wall; the water helps him to stand. I don't know if it is good or bad for him physically, but I do know it is great for him psychologically. It lifts his spirits & his mood, and that is good for his well-being. So I will continue to take him as long as he can & wants to go!
We just renewed our membership in August for another year- how's that for positive thinking!