Unlike many smaller fast-running dinosaurs, its femur was longer than its tibia and metatarsals, suggesting that Acrocanthosaurus was not a fast runner.
Ndryshe nga shumë dinozaurë vrapues, femuri i tij ishte më i gjatë se tibia dhe metatarsalet, duke sugjeruar se Acrocanthosaurusi nuk ishte njw vrapues i shpejtw.