Warming Up In Lunge (one) is a beginner bodyweight exercise for the primary: hip flexors secondary: quadriceps. Most lifters train it for 1 to 2 sets of 8 to 12 reps.
A slow, controlled step into a lunge position with a brief pause at the bottom preps the hips and front thigh for heavier work ahead. It's meant as a movement-prep drill, not a strength builder.
Use 1 to 2 sets of 8 to 12 reps per leg at the start of a leg session, after a few minutes of general movement and before the first warm up set of squats or deadlifts. It is a dynamic movement prep drill, so it belongs in the warm up only and should never be pushed to fatigue. Pair it with hip circles and bodyweight squats for a complete lower body warm up.
Stand tall, step long and pause at the bottom of every rep so the hips and quads get a controlled stretch before loading. This is a bodyweight drill; progress by adding a 2 second pause, a reach overhead at the bottom or a slow 3 second descent rather than adding weight. The single most common fault is rushing the reps; fix it by counting the descent and the pause out loud until the tempo becomes automatic.
It prepares the hips, quads, glutes and hip flexors for heavy leg work by taking them through a controlled range of motion. It raises tissue temperature and rehearses the single leg stability needed in squats and lunges.
Do 8 to 12 per leg for 1 to 2 sets. More than that starts to fatigue the legs before the main lifts, which defeats the purpose.
Yes, dynamic lunges prepare the muscles for loaded movement while long static holds can temporarily reduce force output. Save static stretches for after the session or for rest days.
Keep them bodyweight in the warm up so they stay a preparation drill. If you want loaded lunges, add them as a strength exercise later in the session with a separate set and rep scheme.
Log your warming up in lunge (one) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.