Adaptations to Concurrent Training in Combination with High Protein Availability: A Comparative Trial in Healthy, Recreationally Active Men.
Study Goal
The researchers aimed to determine whether a high-protein diet combined with concurrent exercise training (CET) or resistance training (RES) affects muscle strength, hypertrophy, and anaerobic power adaptations.
Results Summary
The study found that both CET and RES groups showed significant increases in leg press strength (~24-33%), total lean mass (~4%), and vastus lateralis volume (~11-15%), with no differences between groups. However, anaerobic power adaptations showed a trend toward greater improvement in the RES group, suggesting potential interference effects with CET.
Population
Thirty-two recreationally active males (age 25 ± 5 years, BMI 24 ± 3 kg·m²).
Effective Dosage
2 g·kg⁻¹·day⁻¹ of protein.
Duration
Not specified in the abstract.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
concurrent endurance and resistance training (CET) | increase | leg press 1RM | recreationally active males | ~24 ± 13% | increased | #1 |
resistance training only (RES) | increase | leg press 1RM | recreationally active males | ~33 ± 16% | increased | #2 |
concurrent endurance and resistance training (CET) | increase | total lean mass | recreationally active males | ~4% | increased | #3 |
resistance training only (RES) | increase | total lean mass | recreationally active males | ~4% | increased | #4 |
concurrent endurance and resistance training (CET) | increase | ultrasound estimated vastus lateralis volume | recreationally active males | ~15% | increased | #5 |
resistance training only (RES) | increase | ultrasound estimated vastus lateralis volume | recreationally active males | ~11% | increased | #6 |
resistance training only (RES) | increase | Wingate peak power relative to body mass | recreationally active males | 12.5 ± 1.6 W·kg BM | displayed a trend to be greater | #7 |
concurrent endurance and resistance training (CET) | increase | Wingate peak power relative to body mass | recreationally active males | 11.8 ± 1.5 W·kg BM | displayed a trend to be greater | #8 |
concurrent endurance and resistance training (CET) | decrease | select measures of anaerobic power-based adaptations | recreationally active males | - | appear susceptible to 'interference effects' | #9 |
concurrent endurance and resistance training (CET) | no change | muscle strength | recreationally active males | - | not susceptible to 'interference effects' | #10 |
concurrent endurance and resistance training (CET) | no change | muscle hypertrophy | recreationally active males | - | not susceptible to 'interference effects' | #11 |
BACKGROUND: We implemented a high-protein diet (2 g·kg METHODS: Thirty-two recreationally active males (age: 25 ± 5 years, body mass index: 24 ± 3 kg·m RESULTS: Leg press 1RM increased ~ 24 ± 13% and ~ 33 ± 16% in CET and RES from PRE-to-POST (P < 0.001), with no difference between groups. Total lean mass increased ~ 4% in both CET and RES from PRE-to-POST (P < 0.001). Ultrasound estimated vastus lateralis volume increased ~ 15% in CET and ~ 11% in RES from PRE-to-POST (P < 0.001), with no difference between groups. Wingate peak power relative to body mass displayed a trend (P = 0.053) to be greater in RES (12.5 ± 1.6 W·kg BM CONCLUSION: Despite high protein availability, select measures of anaerobic power-based adaptations, but not muscle strength or hypertrophy, appear susceptible to 'interference effects' with CET and should be closely monitored throughout training macro-cycles. Trials Registry: This trial was registered with the Australian-New Zealand Clinical Trials Registry (ACTRN12617001229369).