The Hamstring muscle is probably on of the most problematic muscles and one of the hardest to heal and also increase in strength. Where the big problem really lies is not the lack of actual strength of the Hamstring, but its relative strength by comparison to the Quadriceps. Modern forward sloping footwear and more efficient quad exercises make getting the quad hamstring balance very hard. Also the fact that many Hamstring exercises are variations of back exercises or in the leg curls case only focus on one part of the hamstring this results in the common knee problems that plague many people today.
As bodies that stand upright we require certain muscles to be in tension all of the time and some not it is important to realise the need to ensure that they must be stretched and exercised with a lot of care, because if injury does occur it means that this constant tension will inhibit a timely recovery in the way other muscles that are not in constant tension do. Hammerstep is a simple device that allows the foot be positioned at seventeen degrees during a reverse lunge focusing all of the effort the posterior chain. The Hammerstep reverse lunge squat could be compared to the natural range of movement of the heel strike when sprinting the primary point of hamstring activation. This is the definite functional hamstring strenght gain method. If your curious check it out at www.inno-v8.com

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