A conditioning bottom 1 has a main body 2 and a strong tightening portion 3 which is in the form of a belt and has a tightening force stronger than a tightening force of the main body 2. This strong tightening portion 3 has first strong tightening portions 3a and a second strong tightening portion 3b. When the conditioning bottom 1 is worn, the first strong tightening portions 3a extend so as to surround gastrocnemius muscles of a wearer along outer edges of the gastrocnemius muscles, and the second strong tightening portion 3b is coupled to the first strong tightening portions 3a and extends through the inside of the wearer's lower leg and thigh to a position of the wearer's crotch. Also, a first mesh portion 4 having a tightening force weaker than the tightening force of the strong tightening portion 3 is formed in a section surrounded by the first strong tightening portions 3a.