A Pilot Study Examining the Effects of 8-Week Whey Protein versus Whey Protein Plus Creatine Supplementation on Body Composition and Performance Variables in Resistance-Trained Women
Wilborn CD, Outlaw JJ, Mumford PW, Urbina SL, Hayward S, Roberts MD, Taylor LW, Foster CA
Annals of nutrition & metabolism · 8 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Independent funding
- Government
- Centre of Excellence for Environmental Decisions, Australian Research Council
Based on 1 listed funder(s).
Publication
- Published
- 2016-01-01 · Ann Nutr Metab · vol. 69 · issue 3-4 · pp. 190–199
- Publisher
- Karger Publishers
- Cited
- 14 citations · more than 11% of similar papers · 0.0× the field average
- References
- 30 works
- Access
- Paywalled
- Research areas
- Muscle metabolism and nutrition · Cardiovascular and exercise physiology · Exercise and Physiological Responses
- Keywords
- Bench press, Whey protein, Animal science, Leg press, Lean body mass, Creatine, Resistance training, One-repetition maximum, Medicine, Internal medicine, Endocrinology, Chemistry, Body weight, Food science, Biology
- MeSH
- humans, creatine, absorptiometry, photon, treatment outcome, pilot projects, body composition, dietary supplements, female, muscle strength, resistance training, young adult, whey proteins
8 authors
From US
- Colin WilbornUniversity of Mary Hardin–Baylor
- Jordan J. OutlawUniversity of Mary Hardin–Baylor
- Petey W. MumfordApplied Sciences Laboratory (United States); Auburn University
- Stacie L. UrbinaUniversity of Mary Hardin–Baylor
- Sara E. HaywardUniversity of Mary Hardin–Baylor
- Michael D. RobertsApplied Sciences Laboratory (United States); Auburn University
Abstract
Aims
We performed a pilot study examining the effects of whey protein and creatine supplementation (PRO + CRE group) versus whey protein supplementation (PRO group) alone on body composition and performance variables in a limited number of resistance-trained women.
Methods
Seventeen resistance-trained women (21 ± 3 years, 64.7 ± 8.2 kg, 23.5 kg/m2, 26.6 ± 4.8% body fat, >6 months of training) performed a 4-day per week split-body resistance training program for 8 weeks. Subjects ingested either 24 g PRO (n = 9) or 24 g whey plus 5 g creatine monohydrate (PRO + CRE, n = 8) following each exercise bout. At baseline (T1), 4 weeks (T2) and 8 weeks (T3), body composition was measured by dual X-ray absorptiometry (DXA), strength measures (leg press and bench press one repetition maximum) and lower-body power measures were determined.
Results
DXA lean mass increased from T1 to T3 in both groups (PRO: +2.5 kg, p < 0.001; PRO + CRE: +2.5 kg, p < 0.001), although no differences between groups were observed. Compared to T1 values, performance measures similarly increased in both groups from T1 to T3 although, no between-group differences were observed.
Conclusions
PRO + CRE did not enhance training adaptations compared to PRO, albeit studies employing longer-term interventions with larger sample sizes are needed in order to confirm or disprove our findings.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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