Apple Watch Series 4 cellular counting wrong steps and adding kms ,after calibiration, while travelling is car and working out at gym with weights

Hi,

I recently bought the apple watch series 4 cellular. I have already calibrated my watch. i am getting false readings of steps and distance traveled while traveling in the car or working out with weights at the gym. please note that i switch on the workout mode of my iWatch as others/strength training, while working out with weights and putting it on HIIT mode while doing cardio/HIIT. i have also tried putting my iWatch and iPhone on airplane mode while traveling in the car, but still i get false reading.

Please provide a solution.

Thanks in advance.