Lying Leg Curl - Phase 2 - Day 2 - Strength. When using the Lying Leg curl as part of your training programme, ensure you keep a detailed training log & increase poundages over time. Don't sacrifice form however, in increasing the weight. Do 8/6/4 reps in your warm up sets of the Lying Leg Curl to warm up the hamstrings before completing a working set of 10-12 repetitions. Keep the weight under controll at all times and really squeeze the hamstrings at the top of the movement. Nick Jones - World Bodybuilding Champion & Zoran Lekic - Bodybuilder.