The Claim
In resistance-trained men, a whole-body resistance training routine performed five days per week results in significantly greater increases in muscle thickness of the forearm flexors and vastus lateralis compared to a split routine training each muscle group once per week, following an eight-week training period.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
If you're a guy who already lifts weights, doing full-body workouts five days a week will make your forearm and thigh muscles grow bigger than if you only work each muscle group once a week, after eight weeks of training.
See the scientific wording
In resistance-trained men, a whole-body resistance training routine performed five days per week leads to significantly greater increases in muscle thickness of the forearm flexors and vastus lateralis compared to a split routine training each muscle group once per week, after eight weeks of training.
What the research says
1 studyStudy: High Resistance-Training Frequency Enhances Muscle Thickness in Resistance-Trained Men.
The study found that men who trained their whole body five days a week grew thicker forearm and thigh muscles more than those who trained each muscle group only once a week, which is exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.