Abstract: A resistance training system includes a tackle providing mechanical advantage, and a user performs strength training exercises by pulling or pushing on the running block while resisting motion of the running block by pulling or pushing on the free end of the runner. The running block, fixed block and free end of the system may be secured at various locations of the body.

Abstract: An adjustable dumbbell system may include a base, two or more weights, a handle assembly, an additional weight, and selection assembly. The two or more weights may be supported by the base and grouped into a first set of weights associated with one end of the dumbbell system and a second set of weights associated with an opposing end of the dumbbell system. The handle assembly may be selectively fixedly joined to the first and second set of weights. The additional weight may be disposed distally of the handle assembly. The selection assembly may be secured to the additional weight. The selection assembly may include a selection member that may be linearly moveable between a selected position where the additional weight is operatively secured to the handle assembly and an unselected position where the additional weight is disengaged from the handle assembly.

Abstract: A resistance band exercise machine for performing various exercises. An embodiment includes a housing for a cable-pulley variable resistance system. Some embodiments are configured to receive one or more safety bars to set a starting position of an exercise. Some embodiments include a training partner assistantship feature for a training partner to assist the user by imparting a secondary force on the machine. The configuration of the cable-pulley variable resistance system may be in any manner based on the exercise. In some embodiments, a user performs an exercise on the resistance band exercise machine to overcome a primary (e.g., resistance bands) and secondary (e.g., springs) sources of variably increasing resistance from the cable-pulley variable resistance system.

Abstract: An exercise apparatus comprises a frame with a chamber having a piston slidable between first and second cavity ends of the chamber, and a cable assembly for pulling the piston by an applied force towards the second cavity end to cause a vacuum in the chamber to exert a resistance force on the cable assembly. A cable subassembly extends between first and second parts of the cable assembly, comprising a pulley wheel attached to the first part and a cable extending around the pulley wheel having first and second cable ends. Stoppers on the cable ends engage a bearing member to restrain movement of at least the first cable end when the second cable end is pulled relative to the pulley wheel. Releasable connector means connect the cable ends to the second part to allow a user to choose a magnitude of the resistance force opposing the applied force.

Abstract: A system for a treadmill with a tread that rotates on front wheels supported on a front axle and rear wheels supported on a rear axle includes a locking mechanism. The locking mechanism comprises a first device associated with one of the front axle or the rear axle and configured to prevent rotation of respective front wheels or rear wheels in a first direction and a second device associated with another of the front axle or the rear axle and configured to prevent rotation of the respective front wheels or rear wheels in a second direction opposite the first direction. The system also includes a controller and a sensor configured to detect a user on the tread. The controller is configured to, in response to the sensor detecting no user on the manual treadmill, engage the locking mechanism to prevent movement of the front wheels and the rear wheels.

Abstract: A convenient weight-adjustable dumbbell, comprising a handle, and two rotating disks, two connecting disks, and two fixed blocks, a flexible shaft is connected to the side of each rotating disk, the flexible shaft surrounds the center of the rotating disk, and the other end of the flexible shaft runs through the connecting disk and the fixed block, an outer side of each fixed block is detachably connected with at least one weight block, one side of each weight block is connected with a lock for connecting the fixed block, the other side of each weight block is provided with a second slot, and each weight block is provided with a insertion hole for—the flexible shaft to pass through.

Abstract: An exercise device rotating display mechanism is described herein. An exercise device may include a handlebar and a rotating mechanism. At least a portion of the rotating mechanism may be rotatable relative to the handlebar to pan the rotating mechanism left and right relative to the handlebar. The rotating mechanism may include a pivot including a stop, a display mount rotatably connected to the pivot, and a tab associated with the display mount and configured to engage the stop of the pivot with rotation of the display mount relative to the pivot to define at least one stop position of the rotating mechanism. The rotating mechanism may be connected to a support arm extending from the handlebar. A display may be connected to the rotating mechanism, such that panning of the rotating mechanism positions the display in one of a plurality of positions relative to the handlebar.

Abstract: An exercise machine includes a frame which contains a flywheel which rotates around an axle coupled to spools. Original cords are wrapped around the spools and extend to upper pulleys on the frame. The original cords are coupled to adapter cords which extend to lower pulleys on the exercise machine. By pulling the adapter cords, the spools are rotated which causes the flywheel to spin. The adapter cords are released and springs retract the original cords so they can be pulled again. The lower pulleys lower the exit position of the adapter cords so that the exercise machine can be used with hand paddles to simulate swimming, paddle shafts to simulate paddling movements, exercise handles to simulate upper body functional exercises, or ankle straps to simulate lower body functional exercises.

Abstract: A workout device that allows for at home Nordic hamstring curls using a. doorframe or other immovable object is disclosed.

Abstract: A holding device for using gym equipment for the purpose of muscle building training. The holding device has a handle part and a bracket, and the hand of a person using the holding device can be inserted between the handle part and the bracket. The hand side of the handle part is convexly curved with the exception of local depressions and/or perforations, and parts for releasably securing a dumbbell plate can be releasably secured to the lower face of the handle part. The hand side of the handle part has four groove-shaped depressions which are dimensioned and spaced from one another such when using the holding device as intended with a hand placed on the hand side, each finger is positioned in a respective depression of the groove-shaped depressions with the exception of the thumb.

Abstract: An exercise device includes a platform having a surface for supporting a user of the exercise device and a base having a pivot point that defines an axis. In addition, the exercise device includes at least one arm extending from the platform to the pivot point of the base to allow the platform to rotate about the axis defined by the pivot point.

Abstract: A fitness tool is described. The tool includes a grip component and a handle component. The handle component includes sensors and the grip component includes an electronics unit. The electronics unit includes a fitness application. The fitness application receives a signal from a button located on the grip component to signal that the user is performing an exercise. The fitness application also receives a measurement of force applied to the handle component from the sensors. The fitness application processes the signal and the measurement of force and then transmits the signal, the measurement of force, and other exercise metrics to a computing device. The user interacts with another application on the computing device to view, track, and modify these exercise metrics.

Abstract: The present invention relates to a system (S; S?) for adjusting the weight of a dumbbell, that can be used by a user for carrying out a gymnastic exercise, comprising: a supporting frame (1); at least one dumbbell (2; 3), housed on said supporting frame (1), provided with a handgrip (21; 31), having an axial development along an axis (R), capable of rotating around said axis (R) and provided with a first end (211; 311) and a second end (212; 312), a first plurality of weights (P1; P3), arranged on said supporting frame (1), wherein each weight can be locked individually at said first end (211; 311) by means of first locking means (214; 314), when said handgrip (21; 31) rotates towards a locking position, and can be unlocked from said first end (211; 311), when said handgrip (21; 31) rotates towards an unlocking position, a second plurality of weights (P2; P4), arranged on said supporting frame (1), wherein each weight can be locked individually at said second end (212; 312) by means of second locking mean

Abstract: A weight adjustable dumbbell includes a handle and a first counterweight part and a second counterweight part respectively arranged at two ends of the handle. Each of the first counterweight part and the second counterweight part includes a plurality of dumbbell pieces. Each dumbbell piece includes a mounting hole. The weight adjustable dumbbell further includes an adjusting mechanism. The adjusting mechanism includes a rotating mechanism, a transmission shaft, a first transmission sleeve and a second transmission sleeve. The transmission shaft can drive the first transmission sleeve and the second transmission sleeve to move axially along the transmission shaft and cause distal ends of the first transmission sleeve and the second transmission sleeve to insert into or leave the mounting holes of portion or all of the dumbbell pieces, whereby the dumbbell pieces are fixed on or detached from the first counterweight part and the second counterweight part.

Abstract: A squat rack mountable dip exercising system includes a frame that is removably positionable on and extended between a first guard and a second guard wherein the first and second guards are engaged with and extend forwardly from a squat rack. A grip is attached to the frame and is configured to be graspable by a person performing a dip exercise.

Abstract: A treadmill has a front or rear set of pulleys and a looped running belt. The pulleys rotate with the movement of the belt, e.g., when a user walks, jogs, or runs on the treadmill. The pulleys are mounted on a rotating roller tube so that the roller tube rotates with the pulleys. The roller tube is mounted on a stationary shaft using bearings on each side and a one-way device that allows the pulleys to rotate in one direction. The rotation direction corresponds to the movement of the top of the belt from the front to the rear of the treadmill. The one-way device prevents the pulleys from rotating in the opposite direction, preventing the top of the belt from moving from the rear of the treadmill to the front. The one-way device may be a sprag clutch. The treadmill may be a motor-less, curved treadmill.

Abstract: A barbell support assembly is provided, including: a base; a support arm, including a connection section and a hook section connected with a first end of the connection section, the connection section being rotatably connected to the base and swingable between a first position and a second position, the hook section defining a hooking space; and a restoration unit, connected with a second end of the connection section, biasing the support arm toward the first position; when a rod of a barbell is received within the hooking space, the barbell drives the support arm to move from the first position to the second position, and when the rod of the barbell is removed from the support arm, the restoration unit forces the support arm to return to the first position.

Abstract: A sports specific and injury preventing exercise device for exercising a user. The sports specific and injury preventing exercise device includes a frame and a pair of handles on the frame. The pair of handles are parallel to one another, configured to be parallel to a trunk of the user, offset relative to the frame, and on opposite sides of the frame. The sports specific and injury preventing exercise device also includes a flat support area in a middle of the frame, wherein the flat support area is configured to support one or more weight plates, and a sleeve attached to the flat support area. The sleeve is perpendicular to each of the pair of handles, perpendicular to the flat support area and located at a center point of the frame. The sports specific and injury preventing exercise device additionally includes one or more assist handles.

Abstract: An arm strengthening device comprises a telescoping rod having a plurality of ergonomic grips at a first end and a removable circular weight perpendicularly disposed at a second end.

Abstract: An electric generator which can be coupled to an exercise machine is described. The electric generator is connected to a power grid. Using the mechanical movements of the exercise machine, the generator can produce and feed electricity into the grid, thereby creating a decentralized grid system which is immune to node failures. The generator can communicate with a smart device of a user. The generator can inform the user of the amount of electricity generated by the user while working out. The generator or an application of the smart device can communicate this data to a service provider. Using this data, the service provider can pay the user for the electricity generated. In particular, the service provider can utilize a cryptocurrency to reward the user for the human generated electricity.