I have been on VLC for 5 weeks and have been increasing my workout intensities little by little. I consume very little carbs - only in fruit and 90% cacao chocolate every once in a while... maybe a little whole greek yogurt...
My energy levels have never been higher during high intensity workouts like Sprints x8, 1.5 hours of MMA (same day), 45 minutes of blacktop basketball, Essential Movements Strength. On top of that I'm seeing noticeable gains in coordination, speed, power, and explosiveness. My energy levels throughout the day while at rest are also high and level.
If I'm doing a two-a-day I'll chug a mouthful of olive oil a 1/2 hour before hand and maybe anapple right before I hit the focus mits. The only thing I have noticed is i sweat like crazy.
SW (207lbs) 8/1/2012
Primal Since 8/1/2102
Bike commute to work 20 miles/day ~ rain, shine, or snow.