The proper article for “Andersson Link” depends on the context, as the name alone doesn’t specify a widely known entity. Here are the most likely possibilities:
Many cases of "non-specific low back pain" are actually SI joint dysfunctions. A weak or tight Andersson Link can destabilize the SI joint. If the hamstrings are too tight, they constantly pull the SI joint into a position of stress. If the hamstrings are weak, they fail to provide the necessary force closure during gait. andersson link
To give you the exact "piece" you need, could you clarify the context? The proper article for “Andersson Link” depends on
Reality: This depends on the type of Andersson Link dysfunction. If the patient has an anteriorly tilted pelvis (lordotic posture), the hamstrings are already long and weak. Stretching them further destroys the link. If the patient has a posteriorly tilted pelvis (flat back), the hamstrings are short and tight; stretching them restores the link. A weak or tight Andersson Link can destabilize the SI joint