No,the life line does not foretell length of life,so don't worry if you think you have a short lifeline! In modern hand reading(chronology) it tells us a lot about your health, energy and lifestyle.A short line may mean that you need to use your energy in short bursts with rests in between.More common than a short line is one which stops and 're-starts,usually with the two line overlapping for a while,this shows some kind of change in your lifestyle.