Other systemic illnesses, such as diabetes and hyperthyroidism, or organ diseases affecting the liver and kidneys, can also contribute to deficiency by either preventing normal absorption or disrupting vitamin storage
This effect lets you train harder and longer without fatigue, increasing your workout productivity and helping you break past performance plateaus.
Remember to never double your dose, and if you have missed more than two weeks, always consult your healthcare provider before restarting
Teter et al., 1999)
So first of all, the commonalities between gymnasts and pole vaulters, its definitely not height because gymnasts tend to be short and pole vaulters are tall
The conclusion was direct: resistance training, not aerobic exercise, is what preserves lean body mass during weight loss