Beware of three habits causing knees injuries Excessive climbing exerciseFor cycling climbing, orthopedists think, if knees of cycling friends are not good with related history, cycling climbing is not a suitable movement The cushion is too high or too lowThe height of the cushion is the most important part of the bicycle setting, especially associating with the knee injury and stepping output.The cushion is too high to hurt the knee easily while the center of gravity is too high to produce accidents.The cushion is too low to force foot pedal,