To use knee straps effectively, position them snugly around your knee joints just below the kneecap, ensuring proper blood circulation. Tighten the straps securely to provide stability and support during exercises like squats or leg presses, reducing strain on the knee joint and enabling safer, heavier lifts. Similarly, for powerlifting belts, position them snugly around your waist just above the hips, and tighten to achieve a firm but comfortable fit. Engage your core muscles by pushing against the belt before lifting, maintaining proper breathing techniques throughout the lift to support the spine and enhance stability.