I had S1-L4 front and back laminectomy and foraminectomy. What exercises are safe for me?

I had spines surgeries in 2008 n fusion in 2009.

I had for arthritis so plate n screwed in left foot. I had both knees replaced. City dr did great, country dr not so great.

i walk but my foot can hurt at any time. High arch orthotics have helped but walking the furthest has been 20 mins. sometimes the left knee snaps and I have pain so that affects my walking as well. i can't kneel, too much pain d so no floor exercises.

i tried to swing in the pool and I can't swivel my hips as needed so I just walk or float or bike pedal. Again, foot or knee and back can shorten my time.

i have a trike which I like. Again a left knee pain can shorten my ride.

i just bought a used electric bike, got it overhauled and they put a new seat on it but it was set just a bit too high and that swiveling to get on the seat hurt my back. I was sore for 3 weeks icing, rubs and electric stim on it. i will try again this week.

any suggestions for exercises? i can't dance, I can't do yoga or Pilates.

I do wall stretches for my legs and thighs. what else can I do without hurting myself?

i am sad (not really since it's been years now, I've accepted I can't do as much as before as I used to walk 2 miles briskly with my dog.

It sounds like you have had several surgeries and are dealing with a number of ongoing orthopedic issues that can make exercise and movement challenging. It's understandable to feel sad about the limitations you are facing, but it's important to remember that you can still find ways to stay active and maintain your overall health and well-being.

Here are a few suggestions for exercises that may be suitable for you:

Swimming or water aerobics: Water exercise is a great low-impact option that can be easier on your joints while still providing a good workout. If swiveling your hips is a challenge, you could try using a kickboard or just focus on swimming laps.
Cycling: It's great that you have a trike and an electric bike, as these can be more comfortable and stable options for people with mobility issues. Start slowly and gradually build up your endurance over time.
Strength training: Building strength in your legs and core can help support your joints and reduce pain. You could try using resistance bands, doing bodyweight exercises like squats and lunges, or using weight machines at a gym.
Tai Chi: This gentle form of exercise emphasizes slow, controlled movements that can help improve balance and flexibility without putting too much strain on your joints.
Walking: While you mentioned that you can only walk for short distances, you could still try incorporating walking into your routine in smaller increments throughout the day. For example, you could try walking for 5-10 minutes several times a day, gradually building up to longer walks as you are able.

It's important to listen to your body and avoid pushing yourself too hard, as this can lead to further injury or pain.