In High-Intensity Training, the working set is one all-out effort to failure. The warm-up's job is to prepare the movement and tissues without approaching that failure point — so the working set is honest and safe.
Progressive submaximal reps
Start light — a set of 5-8 with minimal effort to groove the movement. Add weight, reduce reps, and stay well short of failure. A common pattern: 50% × 6, 70% × 4, 85% × 2, then the working set to failure.
Don't waste the working set
The warm-up should leave you ready, not tired. If your warm-ups creep toward failure, the working set suffers. Warm up the movement, then give everything to the one set that counts.
Safety
Warm-ups also prime tissues and joints for the load — part of training to failure safely. Don't skip them; just keep them honest. See the squat reference for warm-up in context.
Frequently asked
How many warm-up sets before the working set?
Usually one to three submaximal sets, depending on the exercise and the weight. Lighter, fewer reps, well short of failure. The final warm-up should leave you fresh for the working set.
Should warm-ups be to failure?
No. Warm-ups prepare; they don't stimulate. Taking a warm-up to failure wastes the effort that the working set needs.
Failure Point is a training logbook, not medical advice. Training to failure carries injury risk.
Consult a physician before starting any intense training program.