Vitamin D

VITAMIN D

Vitamin D is a fat-soluble vitamin that is essential for bone health. It helps the body absorb calcium. The body can produce Vitamin D when the skin is exposed to sunlight (specifically UVB radiation). It is also found in small amounts in some foods (fatty fish, egg yolks) and is available as a supplement.

Vitamin D and Cycling

Outdoors cyclists generally get good sun exposure and therefore tend to have adequate Vitamin D levels during the summer months. However, during winter or periods of heavy indoor training, Vitamin D deficiency can become a concern.

Vitamin D deficiency can lead to fatigue, muscle weakness, bone pain, and increased risk of stress fractures—all detrimental to a cyclist's performance and health. Athletes training heavily are particularly vulnerable to deficiency.

Symptoms of Deficiency

• Fatigue and tiredness
• Bone pain and muscle weakness
• Frequent illness (weakened immune system)
• Mood changes and depression

Recommendation

During winter months or periods of predominantly indoor training, Vitamin D supplementation is often recommended. Consult a doctor to check your Vitamin D levels (via blood test) and advise on appropriate supplementation.