I started using a stationary bike a few years ago during the winter months. I initially tried riding it for 30-40 minutes but soon found that was to much. Now I ride the bike either 8 or 12 minutes each day with a short 30 second burst at 4 minutes followed by a 30 second rest.

This shorter exercise routine provided amazing results. I fully agree with a short burst exercise routine, though doubt the full 1 minute is really needed by everyone. Besides, exercising for long periods, especially running puts extreme stress on joints and bones which for many will cause problems later in life.