An exercise apparatus comprising: a foot support (24a, 24b) suspended from above by a suspension assembly on a frame (16a, 16b, 16c, 16d), the foot support being movable by the user on the frame back and forth between a rearwardmost downward position (24b', 24b''') and a forwardmost upward position (24b", 24b"") through any one of a plurality of complete, reproducible and different arc segments (AP, AP') of a master arcuate path that is the same path from the rearwardmost downward position to the forwardmost upward position and back to the rearwardmost downward position, each different arc segment being individually selectable by the user, each said different arc segment being defined by movement of the foot support between a corresponding different forwardmost upward position (24b", 24b'''') and different rearwardmost downward position (24b', 24b'''), each of said different arc segments (AP, AP') having a different degree of incline (H1, H2) corresponding to each different forwardmost upward and rearwardmost downward position of the foot support, wherein movement of the foot support between the rearwardmost downward position and the forwardmost upward position and back to the rearwardmost downward position defines a complete exercise cycle, characterized in that the apparatus includes: a resistance assembly interconnected to the foot support, the resistance assembly being adapted to exert a resistance to movement of the foot support by the user that varies non-linearly with the degree of speed, velocity, force, work or energy exerted by the user on the foot support or the resistance assembly, the foot support being adapted to support the user in an upright position with the user's foot disposed on the foot support, the foot support being interconnected to a selection device (225, 227, 300, 400) that enables the user to select any one of the plurality of arc segments, the selection device being manually actuatable by the user to exert a selectable amount of manual force (FB') on the selection device (225, 227, 300, 400) that operates to selectively position the resistance assembly according to the selectable amount or degree of manual force (FB') exerted by the user on the selection device (225, 227, 300, 400). a foot support (24a, 24b) suspended from above by a suspension assembly on a frame (16a, 16b, 16c, 16d), the foot support being movable by the user on the frame back and forth between a rearwardmost downward position (24b', 24b''') and a forwardmost upward position (24b", 24b"") through any one of a plurality of complete, reproducible and different arc segments (AP, AP') of a master arcuate path that is the same path from the rearwardmost downward position to the forwardmost upward position and back to the rearwardmost downward position, each different arc segment being individually selectable by the user, each said different arc segment being defined by movement of the foot support between a corresponding different forwardmost upward position (24b", 24b'''') and different rearwardmost downward position (24b', 24b'''), each of said different arc segments (AP, AP') having a different degree of incline (H1, H2) corresponding to each different forwardmost upward and rearwardmost downward position of the foot support, wherein movement of the foot support between the rearwardmost downward position and the forwardmost upward position and back to the rearwardmost downward position defines a complete exercise cycle, characterized in that the apparatus includes: a resistance assembly interconnected to the foot support, the resistance assembly being adapted to exert a resistance to movement of the foot support by the user that varies non-linearly with the degree of speed, velocity, force, work or energy exerted by the user on the foot support or the resistance assembly, the foot support being adapted to support the user in an upright position with the user's foot disposed on the foot support, the foot support being interconnected to a selection device (225, 227, 300, 400) that enables the user to select any one of the plurality of arc segments, the selection device being manually actuatable by the user to exert a selectable amount of manual force (FB') on the selection device (225, 227, 300, 400) that operates to selectively position the resistance assembly according to the selectable amount or degree of manual force (FB') exerted by the user on the selection device (225, 227, 300, 400). a resistance assembly interconnected to the foot support, the resistance assembly being adapted to exert a resistance to movement of the foot support by the user that varies non-linearly with the degree of speed, velocity, force, work or energy exerted by the user on the foot support or the resistance assembly, the foot support being adapted to support the user in an upright position with the user's foot disposed on the foot support, the foot support being interconnected to a selection device (225, 227, 300, 400) that enables the user to select any one of the plurality of arc segments, the selection device being manually actuatable by the user to exert a selectable amount of manual force (FB') on the selection device (225, 227, 300, 400) that operates to selectively position the resistance assembly according to the selectable amount or degree of manual force (FB') exerted by the user on the selection device (225, 227, 300, 400).