Training · Moderate evidence
Recent Workload as a Signal, Not a Blocker
The acute-to-chronic workload ratio has statistical flaws and does not predict injury reliably enough to halt training; it serves as one signal among others.
Critical reviews and reanalysis · 2 sources · 2 min
What the studies show
- The ratio reacts to any denominator, even a random one, which inflates associations with injury.
- The authors recommend abandoning the ratio as a standalone decision rule.
How Letz applies it
Low readiness makes the day's cardio lighter (no sprints, fewer rounds), but nothing is blocked and the user decides.
Who it applies to
Workload monitoring in sports and recreational training.
Limits
This does not mean workload does not matter: it means the ratio alone is poor for making standalone decisions.
Sources
More in Training
- Resistance Training, Strength, and HypertrophyVarious training prescriptions improve strength and hypertrophy; heavier loads favor strength, and multiple sets favor hypertrophy.
- Weekly Volume: Sets per Muscle GroupMore weekly sets per muscle produce greater hypertrophy, with diminishing returns; for strength, moderate volumes already capture most of the gains.
- Frequency: training each muscle at least twice per weekTraining a muscle group twice a week is superior to once for hypertrophy; for strength, higher frequency helps primarily because it distributes volume more effectively.
- Load and rep rangeLight and heavy loads produce similar hypertrophy when sets are taken close to failure; heavy loads are superior for maximizing strength gains.