A treadmill is provided according to various embodiments herein. The treadmill includes a first rotatable element coupled to the frame; a second rotatable element coupled to the frame; an intermediate member coupled to the frame that is disposed intermediate the first rotatable element and the second rotatable element and coupled to at least one of the first rotatable element or the second rotatable element; a running belt disposed about the first and second rotatable elements, the running belt defining a non-planar surface; and a safety device coupled to the intermediate member. The safety device is operable to substantially prevent rotation of at least one of the first rotatable element or the second rotatable element in a first rotational direction and permit rotation of the at least one of the first rotatable element or the second rotatable element in a second rotational direction opposite the first rotational direction.

An indication is received from a user to rack or unrack a digital weight. A motor is signaled to apply or remove tension to a cable couple to the motor based at least in part on the indication. The actuator is connected to the cable and is physically arranged to deliver a force to the user. The motor selectively tensions a cable in accordance with an exercise program.

An exercise machine is disclosed. The exercise machine comprises a motor, an actuator, a vertically pivotable arm, and a cable. A position of the vertically pivotable arm is able to be locked at least in part by using a component including one or more teeth. The vertically pivotable arm includes a release component. The cable is coupled between the actuator and the motor through the vertically pivotable arm. The motor facilitates strength training at least in part by generating resistance such that a force on the actuator corresponds to a specified weight.

An indication is received from a user to rack or unrack a digital weight. A motor is signaled to apply or remove tension to a cable couple to the motor based at least in part on the indication. The actuator is connected to the cable and is physically arranged to deliver a force to the user. The motor selectively tensions a cable in accordance with an exercise program.

Golf balls including one or more layers having at least one radar detectable mark disposed on the surface thereof are provided.

Climber exercise machine comprises a frame connected to a base through a base connection, the frame pivotable about the base connection. A right handle and a left handle are connected to respective right and left sides of the frame, the right handle moving within a first range of motion, the left handle moving within a second range of motion. A right pedal and a left pedal are connected to the respective right and left sides of the frame, the right pedal moving within a third range of motion, the left pedal moving within a forth range of motion. The right handle, the left handle, the right pedal, and the left pedal movable generally in the same plane. An angle between the frame and a plane parallel to an underside of the base is adjustable while the climber exercise machine is mounted by a user.

An exercise machine is disclosed. The exercise machine comprises a frame, a first motor, a second motor, a first arm, and a second arm. The frame includes a front side and a back side. A longitudinal axis of the first motor passes through the front side and the back side of the frame. The first motor drives a first cable and the second motor drives a second cable. The first arm positions the first cable and the second arm positions the second cable. The frame is capable of being wall mounted.

Disclosed is a device for measuring speed of a tennis ball, which includes: a housing, a power supply, a main control device, a sensor device, a transmission device, a clamping device and a limiting device. The clamping device is clamped at the serve opening of a tennis ball machine, which can detect the serve speed of a tennis ball accurately with simple operation. The transmission device is engaged with the second sensor device, and the housing is slidably connected with the second sensor device. The emitting ends of the second sensor device and the first sensor device are positioned in the same vertical plane. The limiting device is connected with the second sensor device to limit excessive operation of the transmission device.

An exercising apparatus for exercising at least one limb, having a supporting frame and at least one crank which is arranged on a rotation shaft assigned to the supporting frame, and having at least one limb support which can be fastened to the at least one crank at different radial distances from the rotation shaft. A detector is provided for detecting the radial distance of the at least one limb support from the rotation shaft. The invention further relates to a limb support and to a method for determining the force acting on a limb support of an exercising apparatus.

Disclosed herein are robust disposable alternating tangential flow (ATF) housing and diaphragm pump units and associated methods of manufacturing, testing, wetting, and using the same.