Athletic Performance and Vitamin D – showing an increase Type II muscle fiber at optimal (50ng/mL) levels
Vitamin D Associated w/ Greater Muscle Mass – effects hypothesized from both an androgenic point of view and direct muscle receptors (VDR)
Vitamin D and Mitochondria – As athletes, we absolutely want to maximize density and efficiency of mitochondria
Faster Muscular Recovery w/ higher 25(OH)D Levels
I have seen recommendations of 4000ius per day, but also with the warning that everyone responds differently – a dose too small is pointless, a dose too high is harmful and can lead to toxicity of the blood.
Kettlebell WOD 
Saw your Twitter Post…travellig with no KB, but here’s today’s Hotel WOD.
7/10/13 Hotel Tabata
67 Push-up 18,11,9,7,7,5,5,5
90 Sit-Up 11,14,14,11,10,10,10,10
103 Squat 14,15,13,14,12,12,12,11
32 Burpee 4,4,4,4,4,4,4,4
I’ve read that to boost the immune system especially for cancer survivors, 21,000IUs is a minimum amount.