Most people smash a muscle once a week and leave it — but muscle protein synthesis, the actual growth switch, only stays elevated for around 48 hours after you train it. Hit a muscle once weekly and it's in growth mode barely two days, then idle. Research shows training each muscle twice a week beats once when total volume is matched.
Action Tip: Split your weekly sets for each muscle across two sessions instead of one. This "Two-Touch Rule" keeps protein synthesis switched on more often through the week, driving more growth from the exact same total volume.
What's your current training split?
Vote below, then comment: how often does each muscle get hit?