When I initially started my weight loss efforts many years ago, I did cardio everything because the only thing on my mind was burning calories.
I would run on the treadmill, use elliptical machines, stationary bicycles, and any other piece of cardio equipment available in the gym.
My results were not the best. It felt like it took forever to lose any weight. When I switched to HIIT (high-intensity interval training) with bodyweight exercises and free weights, I began to have results.