Seat mechanisms

A seat mechanism on a stationary exercise bicycle having a frame comprising:

• a support tube secured to the frame;
• a rack configured with a plurality of teeth secured within said support tube;
• and
• a seat post positioned within said support tube for substantially vertical movement;
• a latch mechanism including a release handle pivotally secured to an upper portion of said seat post with a handle portion extending outwardly in a first horizontal direction from said seat post and a connecting rod located within said seat post pivotally connected at an upper end to said release handle within said seat post and pivotally connected at a lower end to a latch member wherein said teeth and said latch member are configured to form a ratchet mechanism such that, when said latch member is engaged with said teeth, downward motion of said seat is prevented and lifting upwardly of said handle portion of said release handle by a user causes said connecting rod to move upwardly thereby being effective to disengage said latch member from said teeth to allow said seat to be moved downwardly and wherein said seat can be moved upwardly without said disengagement of said latch member from said teeth.