Final answer:
Performing a squat using a knee strategy can lead to knee valgus and potential injury.
Step-by-step explanation:
Performing a squat using a knee strategy can have negative effects on the knees, specifically in the form of knee valgus and potential injury. Knee valgus refers to the inward collapse of the knees towards each other, which can put excessive stress on the ligaments and structures surrounding the knee joint, increasing the risk of injury. It is important to use proper technique and alignment during squats to prevent knee valgus and protect the knees from potential harm.