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No Difference between Spray Dried Milk and Native Whey Supplementation with Strength Training.

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Supplementing with either milk or native whey protein during 12 weeks of strength training did not result in different gains in muscle mass or strength for young adults. Both protein sources equally supported muscle growth and strength development in untrained individuals.

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Area of Science:

  • Exercise Physiology
  • Nutritional Science
  • Sports Medicine

Background:

  • Rapid digestibility and high leucine content are key for muscle protein synthesis.
  • Native whey's properties suggest potential for greater anabolic effects than milk.
  • This study investigated whey vs. milk supplementation during strength training.

Purpose of the Study:

  • To compare the effects of milk versus native whey supplementation.
  • To assess impact on muscle mass and strength gains.
  • To evaluate anabolic signaling in young adults undergoing strength training.

Main Methods:

  • Double-blinded, randomized, controlled study with 40 participants.
  • 12-week strength training intervention with daily milk or native whey (20g protein).
  • Assessed muscle mass, strength, cross-sectional area, thickness, and kinase phosphorylation.

Main Results:

  • Significant increases in muscle mass and strength (5%-16%) in both groups.
  • No significant differences in muscle gains or strength between milk and native whey groups.
  • Acute anabolic signaling (p70S6K phosphorylation) increased post-exercise but showed no supplement-specific differences.

Conclusions:

  • Milk and native whey supplementation yield similar outcomes for muscle mass and strength.
  • Neither supplement provided a distinct advantage in enhancing muscle adaptations.
  • Acute signaling responses did not correlate with long-term muscle or strength gains.