The Benefits of Whey Protein for Body Composition

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The Benefits of Whey Protein for Body
Composition

• Associate Professor David Cameron-Smith
• School of Exercise and Nutrition Sciences
• Deakin University
• Victoria
• AUSTRALIA

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IMPORTANCE OF SKELETAL MUSCLE

• Largest tissue of the human body
• Responsible for the vast majority of energy use
• Primary site of glucose disposal, fat use and
  protein stores
• Major site of hormone action (insulin)

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WEIGHT GAIN AND REDUCED INSULIN ACTION

• OBESITY
• Fat accumulation, predominately central fat,
  reduced insulin action
• Type 2 Diabetes
• Lipotoxicity

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MUSCLE STRUCTURE
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LARGE CAPACITY FOR REGENERATION
Garry DJ et al PNAS 97 5416-21, 2000
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DYNAMIC REGULATION NEW MUSCLE
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STRENGTH ATHLETES

• Major food and supplement market
• Must achieve
• Muscular growth
• Muscular repair
• Fast digested protein sources, rich in Branch
  Chain Amino Acids maximize growth repair.

Chen Yanqing celebrates her gold medal 58 KG
weightlifting group
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BODYBUILDERS
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MUSCULAR HYPERTROPHY
Exercise Protein
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ADULT STEM CELLS SATELLITE CELLS

• Muscle growth due to
• Protein synthesis in mature muscle fiber
• Amino Acids
• Activation, proliferation and maturation of stem
  cells (satellite cells)
• Exercise

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PROTEIN SYNTHESIS
http//cellbio.utmb.edu/cellbio/rer4.jpg
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Exercise Protein
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Exercise Protein
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Exercise Protein
1-4
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EXERCISE ACTIVATION OF PROTEIN SYNTHESIS
Rasmussen BB et al. J. Appl. Physiol. 88386-92,
2000
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EXERCISE ACTIVATES PROTEIN SYNTHESIS
WHEY PROTEIN INGESTION INCREASES THE RESPONSE
Placebo Whey Protein
Farnfield et al (In Submission, 2009)
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TIMING AND PROTEIN TYPE IS IMPORTANT
Cribb Hayes MSSE 2006 38(11)1918-25.
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BRANCHED CHAIN AMINO ACIDS IN FOODS
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WHEY FAST PROTEIN
Tang et al. Journal of Applied Physiology (In
Press)
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WHEY SUPERIOR PERFORMANCE
Tang et al. Journal of Applied Physiology (In
Press)
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WHEY NOT JUST FOR THE YOUNG
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MUSCLE LOSS WITH AGE
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SKELETAL MUSCLE
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EXERCISE AND WHEY PROTEIN IN OLDER PEOPLE
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WHEY SUPERIOR PROTEIN SYNTHESIS AFTER MEALS
ß-lactoglobulin (14.5 leucine), Prolacta
(13.4), a-lactalbumin (10.9), casein (10).
Rieu et al Nutrition 23 (2007) 323331
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OLDER MALES (65-75YEARS) 26GRAMS WHEY
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PROTEIN SYNTHETSIS SLOWED NOT LOST
Cuthbertson et al. FASEB J. 2005 19(3)422
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WHEY PROTEIN

• Superior Composition (Leucine, BCAA)
• Fast Digestion
• Proven Benefits to Activate Protein Synthesis
  After Exercise
• Effective Activation of Protein Synthesis in Old
  Individuals