For today’s edition of Dear Mark, we’re answering three questions. First up, how can you mitigate and overcome an acute holiday sugar binge? What are the best exercises for getting rid of all that sugar, fast? Next, is a long (like, really long) bike commute congruent with a healthy Primal lifestyle, assuming you also want enough energy and time to lift weights, run sprints, and play with your kids? And finally, are there any downsides to calorie restriction in teens? Probably, so read on to find out.