ScienceHow much exercise is healthy?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScience07/21/2016July 21, 2016Dr. Klaus-Michael Braumann discusses how often and how long people should exercise to achieve the best results. He also takes up the question of whether cardio training or strength training is healthier.https://p.dw.com/p/1JSqWAdvertisement