Many people have asked me why do you have your athletes perform Olympic Lifts and Squatting Movements in Weightlifting Shoes and not regular shoes. Whether you call them Sneakers, Running Shoes, Tennis Shoes, or Cross Trainers they are made for cushion and to absorb the impact of movement and not necessarily for stability and support while handling medium to heavy weights on your body.
As you can see in this video as the athlete squats down their is a shifting of his weight to the inside and a slight elevation of his heal. There is a tremendous amount of movement taking place at the foot and ankle. This can lead to the ankle, knee, and hip to taking on more stress then necessary by slightly changing the motor pattern of the lift. Over time this can lead to muscular imbalance issues and soft connective tissue inflammation.
Weightlifting shoes will provide a Stable base of support for the Athlete. Not allowing the shoe to rock from side to side and allowing the athlete to push through the foot and have consistent contact point with the floor. This will allow for better Ground Reaction Force Development by the athlete.