It is simply using an exercise bike and walk quite good, while the weight loss?

Do you want the loose skin or be more strict diet while also

Loose skin is usually seen more in people who have grown fat, not just overweight. If you fall into the category obese, then you may very well see a bit of loose skin once you get off to a healthy weight again. To answer your question, any exercise that raises your heart rate and uses at least some of the major muscle groups to do so will be beneficial for weight loss. Beginners often cycle to exercise and walk as you do.

Vacation Workout for Beginners