I was talking with a very knowledgeable friend about training. She said the most natural way to train is with body weight exercises throughout the day. Similar to gtg training. She said this is what people did hundreds of years ago. Setting aside 30 minutes or more is not really the best way to train- unless your talking about going for a walk or run as those forms of training are necessary, critical and quite natural. Any other thoughts on this topic would be appreciated. Thanks.