I just had alumbar fusion on L5-S1 two weeks ago. My surgeon has not given me any sitting restrictions. I can sit as long as I am comfortable. I found the best way was to use one of our dining room armchairs. It's a good height, a firm cushion, and arms to help me get in and out of the chair.
I've found that trying to be up and around a lot during the day helped me feel better faster. The more I laid around, the more it hurt. At two weeks now I'm feeling really good....I can do laundry (with my grabber), cook dinner, drive and run errands, pretty much anything that doesn't involve bending twisting or lifting. I have two kids age 22 months and 4, so I've got plenty to do lol. My mom is here to help with their care.
Walking is great. He should walk as much as possible throughout the day. My doc wanted me to be able to walk 1/2 mile a day by 1 week post op. He wants me walking 3-5 miles a day by one month. He's tough but lots of walking gives the best results. I'm 37, female.
Hope your husband has an easy recovery...keep us posted