1. On today’s show: the science of exercise with tips for both experienced marathoners and couch to 5k’ers.

Spray and Pray (by Fadzly @ Shutterhack)

    On today’s show: the science of exercise with tips for both experienced marathoners and couch to 5k’ers.

    Spray and Pray (by Fadzly @ Shutterhack)

  2. exercise

    science

    gretchen reynolds

    the new york times

    the first 20 minutes