The present disclosure provides a rotary dumbbell. The rotary dumbbell includes a handle part, a base part, weight parts arranged at two ends of the handle part respectively, and a transmission self-locking mechanism and a driven mechanism which are arranged at the two ends of the handle part respectively and abut against the weight parts respectively. The transmission self-locking mechanism includes a transmission assembly and a self-locking ring; the transmission assembly includes a planetary gear transmission mechanism, a first output screw, a long nut and a first screw spline. The driven mechanism includes a decorative ring, a second handle flange, a second transition flange and a driven assembly. The driven assembly includes a second output screw and a second screw spline; the weight parts are provided with weight plates with a dovetail groove structure; and the base part is provided with an unlocking thimble.

A treadmill has a treadmill frame and a treadmill belt movably mounted on the treadmill frame. An air space exists between the treadmill belt and a support surface on which the treadmill is placed at a rear of the treadmill belt. A disconnect switch is positioned to engage an object entering the air space. The disconnect switch is operatively connected to the treadmill motor so that the treadmill motor automatically shuts off when the disconnect switch is activated.

A system for a manual treadmill having a tread that rotates around a front axle and a rear axle and side rails on opposing sides of the tread includes a brake configured to slow rotation of at least one of the front axle or the rear axle, a controller, and a first presence sensor in communication with the controller, the first presence sensor positioned on a side rail and configured to detect a user on the side rail. The brake is not normally engaged during operation of the treadmill when the tread is moving and the first presence sensor does not detect the user on the side rail. The controller is configured to, in response to the first presence sensor subsequently detecting the user on the side rail, engage the brake.

Trampoline systems containing multiple trampoline jumping surfaces are disclosed. Methods of making and using trampoline systems containing multiple trampoline jumping surfaces are also disclosed.

A safety signal is sent to a relay coupled to a plurality of power leads of a motor wherein a default state of the relay is to short the plurality of power leads together and wherein the safety signal maintains the relay in an open state. The safety signal to the relay is deasserted in response to a determination that an unsafe condition has occurred.

An exercise machine monitoring and instruction system for the movement of an element of an exercise machine by an exerciser and providing automated feedback to the exerciser to help improve the exercise in real-time. The exercise machine monitoring and instruction system generally includes an exercise machine having a movable element that moves between a first position and a second position in a reciprocating manner, a sensor that detects a real-time position of the movable element, a processor in communication with the sensor to receive the real-time position data from the sensor related to a position of the movable element and a feedback device in communication with the processor that provides real-time instructions to the exerciser on how to adjust their workout to achieve a desired result.

An exercising device including a lever or power arm which is able to be arranged by a first end on a retaining element at a first articulated joint in a way pivotable about a pivot axis or pin, whereby a resistance element is able to be coupled by a first end region at a first coupling point on the power arm, and by a second end region at a second coupling point at a second articulated joint on the retaining element. The exercising device is able to be detachably arranged on a structure by means of an engaging connection, which is formed by a hook-shaped recess and a rod-shaped element and whereby the exercising device is lockable in an engaged position by means of a fixation.

A weight apparatus includes a handle, first and second anchorages mounted to first and second ends of the handle, respectively, the handle and the first and second anchorages having an axially extending opening, first and second rods axially movable inside the axially extending opening and adapted to be moved axially relative to the axially extending opening in opposite directions upon rotation of first and second pinion gears in the first and second anchorages, respectively, that engage with first and second racks on the first and second rods, respectively, and a lock having a locked condition in which rotation of the first and second pinion gears is prevented and an unlocked condition in which rotation of the first and second pinion gears is permitted.

An exercise and therapeutic device includes a treadmill comprising a running belt coupled to a treadmill frame and an offloading system coupled to the treadmill. The offloading system includes an air chamber surrounding the running belt adapted to be selectively inflated between a deflated condition and an inflated, operating condition, a user seal coupled to the air chamber, adapted to receive a user so that, in an operating condition, at least a portion of a user is received in the user seal and positioned within the air chamber and to seal the air chamber around the user, a pump operable to inflate the air chamber, at least one strap coupled to the treadmill frame and adapted to restrict the expansion of the air chamber and adjust a spacing of the user seal relative to a running surface of the running belt when the air chamber is inflated.

Provided herein are embodiments of a barbell spotting apparatus having all the benefits of a free-floating, unconstrained barbell in both the horizontal and vertical axes with the safety of a dedicated spotting mechanism, while addressing safety, noise, and space concerns raised by typical barbell apparatus. The embodiments herein permit a loaded barbell to be positioned in line with the axis of motion of the lift to be performed at both the beginning and end of the lift.