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Diet and Nutrition

Protein, vitamins and minerals

  • 3 things to know
  • Paper 2

Overview

Protein for repair and strength athletes, vitamins C, D, B-12 and the B-complex, and sodium, iron and calcium for performers.

What you need to know

Answer each one before you reveal it.

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Key term

Why does iron matter to an endurance performer, and why are female endurance athletes at particular risk of low iron?

Key term

What is the main exercise-related function of protein?

Key term

Why might a weightlifter need more protein than a sedentary person?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is the main exercise-related function of protein?

    Model answer

    Protein supplies the amino acids needed to grow and repair muscle tissue. Protein is used as a fuel only when carbohydrate and fat stores are very low.

  2. 2

    Why might a weightlifter need more protein than a sedentary person?

    Model answer

    Heavy resistance training causes micro-tears in muscle fibres. Extra protein supplies the amino acids needed for repair and hypertrophy.

  3. 3

    Name some good dietary sources of protein.

    Model answer

    Good animal sources include lean meat, fish, eggs and dairy foods. Pulses, nuts and soya are useful plant sources.

  4. 4

    What problems can an excessive protein intake cause?

    Model answer

    Excess protein is not stored as extra muscle and may be converted to fat or used for energy. A very high intake also places extra strain on the kidneys.

  5. 5

    Outline the role of vitamin C.

    Model answer

    Vitamin C is an antioxidant that helps protect cells from damage. Vitamin C is also needed to form collagen and helps the body absorb iron.

  6. 6

    How might a lack of vitamin C affect an injured performer?

    Model answer

    Vitamin C is needed to make collagen, the protein in tendons, ligaments and scar tissue. A deficiency would slow the healing of damaged tissue.

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