Strong ✅ Flexible ✅ Strong through full range of motion? Questionable. But why is this important? Well firstly you generate a greater power output even if you use less weight and do full range. This is applied to typical gym exercises too like squats and bicep curls. Secondly, these slow eccentrics help to not only strengthen the muscle but the connective tissue as well, something that's not often trained but needs to be!