Just before you crest a hill or reach the end of a speed interval, your lungs go into overdrive.
Many runners would like to lose a pound or 2.
- Written by Victoria Philpott
22 February 2012 Last updated at 11:58 ET By Stephanie Hegarty BBC World Service
Herbs at a Glance is a series of brief fact sheets that provides basic information about specific herbs or botanicals—common names, what the science says, potential side effects and cautions, and resources for more information.