(Walking / To walk) on a regular basis everyday is more effective than making intense efforts once in a while.
Sometimes it is very difficult for us (non native) to understand the difference between infinitive form and gerund form, especially when they are used as 'subject'. The infinitive or infinitive phrase can indeed be the subject of the verb.
So, what is the answer? What is difference between 'walking' and 'to walk'? Why one is the answer and the other is not?