a good rule of thumb for cardio is heart rate around 130. if your heart rate is around there walking flat, you’re chilling. as your cardiac health improves, you’ll be able to go faster or add in incline

10

Ngl gave up on doing cardio in the gym cant be bothered i just get my 10k

8

Not optimal but better than nothing. Incline just means more work but if you can’t do that then it’s probably better doing it flat for longer

5

Only you dictate what you can do. Incline makes the walk harder but if walking is hard enough then do that until it isn't anymore and progress to incline

1