This is great to hear! When I first did Atkins I had ZERO issues adapting to the new lifestyle and working out, but in those days I rarely did more than maybe a 60 minute weight-training workout. I suspect I will have a different experience trying to adapt to already pretty heavy and consistent running and cycling workouts. Part of the reason I'm starting this time of the year is that my race season is mostly over and now it's a matter of building back up the miles at an easier effort.