A hamstring injury can be caused by many reasons including tight, weak hamstring muscles or hamstring pulls or strains. (verywellfit.com)
An athlete with weak hamstrings will have difficulty pulling the bar off the ground, the first phase of the lift. (completehumanperformance.com)
As another example... If you are a cyclist, the same primary lift applies, but incorporating stiff legged deadlifts as your secondary rather than front squats, as cyclists tend to have tight, overly developed quads and comparatively weak hamstrings. (completehumanperformance.com)