Abstract: A treadmill including a frame, a suspension connector, a flexible deck, and a belt. The suspension connector is connected to the frame. The flexible deck is connected to the suspension connector. The flexible deck includes a metal panel extending substantially an entire width and length of the flexible deck. The belt is disposed on the flexible deck.

Abstract: A treadmill including a frame, a suspension connector, a flexible deck, and a belt. The suspension connector is connected to the frame. The flexible deck is connected to the suspension connector. The flexible deck includes a metal panel extending substantially an entire width and length of the flexible deck. The belt is disposed on the flexible deck.

Abstract: A treadmill including a frame, a suspension connector, a flexible deck, and a belt. The suspension connector is connected to the frame. The flexible deck is connected to the suspension connector. The flexible deck includes a metal panel extending substantially an entire width and length of the flexible deck. The belt is disposed on the flexible deck.

Abstract: A treadmill including a frame, a suspension connector connected to the frame, and a flexible deck connected to the suspension connector. The flexible deck is configured to flex in response to a load applied by a user striding on the treadmill. The suspension connector includes a suspension pivot that allows rotation of the flexible deck around the suspension pivot.

Abstract: An exercise machine. The exercise machine includes a frame, a foot engagement surface operably connected to the frame, and an arm rotatably connected to the frame at a pivot. The arm includes a handle connected to the arm at a first location distal to the pivot. The handle is configured to be gripped by a user. The arm includes a weight receiver connected to the arm at a second location distal to the pivot. The weight receiver is configured to hold one or more weights to modify a downward force provided at the handle.

Abstract: A treadmill including a frame, a suspension connector connected to the frame, and a flexible deck connected to the suspension connector. The flexible deck is configured to flex in response to a load applied by a user striding on the treadmill. The suspension connector includes a suspension pivot that allows rotation of the flexible deck around the suspension pivot.

Abstract: An exercise machine. The exercise machine includes a frame, a foot engagement surface operably connected to the frame, and an arm rotatably connected to the frame at a pivot. The arm includes a handle connected to the arm at a first location distal to the pivot. The handle is configured to be gripped by a user. The arm includes a weight receiver connected to the arm at a second location distal to the pivot. The weight receiver is configured to hold one or more weights to modify a downward force provided at the handle.

Abstract: A crank-driven exercise device (100). The crank-driven exercise device (100) includes a frame (102), a spindle (202) rotatably connected to the frame (102), a crank arm (104) connected to the spindle (202), and a user input (208) connected to the crank arm (104) configured to receive a force from a user. In some embodiments, the crank arm (104) includes a proximal section (204) and a distal section (206). The proximal section (204) may be connected to the spindle (202) at a spindle interface (302), the distal section (206) may be rotatably connected to the user input (208) at a user input interface (306), and the distal section (206) may be selectively fastenable and selectively rotatable relative to the proximal section (204) at a crank interface (304).

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, and a generator. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The generator is operably associated with the first treadle such that the generator is driven in response to the first treadle pivoting relative to the frame. Other embodiments of dual treadle treadmills are also described.

Abstract: A crank-driven exercise device (100). The crank-driven exercise device (100) includes a frame (102), a spindle (202) rotatably connected to the frame (102), a crank arm (104) connected to the spindle (202), and a user input (208) connected to the crank arm (104) configured to receive a force from a user. In some embodiments, the crank arm (104) includes a proximal section (204) and a distal section (206). The proximal section (204) may be connected to the spindle (202) at a spindle interface (302), the distal section (206) may be rotatably connected to the user input (208) at a user input interface (306), and the distal section (206) may be selectively fastenable and selectively rotatable relative to the proximal section (204) at a crank interface (304).

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, a clutch axle, and a tensioning mechanism. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The clutch axle includes an axle, a first driver, and a second driver. The axle is rotatably connected to the frame. The first driver is coupled to the axle by a first clutch. The first clutch transmits torque between the first driver and the axle in response to the first driver rotating in a first direction relative to the axle. The first treadle is connected to the first driver through a first link such that the first driver is rotated in a first direction in response to the first treadle being pivoted in the first direction. The tensioning mechanism maintains a tension on the first link.

Abstract: A dual treadle treadmill. The dual treadle treadmill includes a frame, a first treadle, a second treadle, and a generator. The first treadle and the second treadle are each pivotally coupled with the frame and each have a moving surface. The generator is operably associated with the first treadle such that the generator is driven in response to the first treadle pivoting relative to the frame. Other embodiments of dual treadle treadmills are also described.