will walking on the treadmill 6 days a week for 30 to 60 minutes improve conditioning, fat loss and/or heart and health along with 3 full body strength training workouts per week
Yes it can be used to burn extra calories (without impacting performance), and is considered a form of Active Recovery as well, depending how you utilize it.
Yup. Especially if compared to NOT doing that.
If this is more than you do now - then yes.
Any increase in your activity level will help improve conditioning. And will help fat lose so long as you don’t eat more.
Depends on your baseline. If you maintain your heart rate at 65-75% of your max heart rate (220-age), 30-60min can be a fairly effective stimulus. If your resting heart rate is above 80bpm, you will probably see conditioning gains
It’s unlikely you’ll work up a significant caloric expenditure from the walking, but it will definitely help (provided you don’t then overeat)
Absolutely! WHO recommends 150-300min of moderate intensity aerobic exercise each week, to significantly reduce mortality and risk of CVD
Including weight training is massively benefical for all three of your above goals, great stuff!