A dumbbell has a core rod and a cloth cover. The core rod has a supporting rod and a bag. The bag is mounted around the supporting rod. A first filling space is formed between the supporting rod and the bag. The first filling space is filled with a weight material. The cloth cover is mounted around the core rod and seals the core rod. The cloth cover has a holding portion and two weight portions. The two weight portions are respectively formed at two ends of the holding portion. A second filling space is formed between the core rod and the holding portion. The second filling space is filled with the weight material. A respective third filling space is formed between the core rod and each one of the two weight portions.

A weighted sock has a weight assembly at a portion of the sock. The weight assembly has a weight carrier. The weight carrier has a carrier space with a weight therein. The weight is configurable to take on a first shape by a force which also changes the shape or dimension of the weight carrier. The weight carrier, when having the changed shape or dimension, has a force of sufficient magnitude to reconfigure the weight into a second shape different from the first shape when the force which also changes the shape or dimension of the carrier is removed.

A weight object configured to be lifted from a ground surface includes a first portion made of high-durometer material, a second portion made of elastomeric material having lower durometer than the first portion, and a handle for holding the weight object and lifting the object from the ground surface, where the second portion includes spaced holes within the elastomeric material for absorbing noise generated when the weight object is dropped on the ground surface. Alternatively, a weight object is disclosed which is configured to be lifted from a ground surface, comprising at least one layer of elastomeric material having spaced holes therein for absorbing noise generated when the weight object is dropped on the ground surface, and an opening configured to receive a handle.

An exercise device and methods for using the exercise device. The exercise device is a spherical structure having a rigid surface and an opening therein for the user's hand to grasp a handle affixed in the center of the spherical structure. A series of exercises may be performed with the exercise device, including push-ups, rows and swings.

A running device and method of using the device are disclosed. The device may include a moveable material within an inner chamber of the running device's housing. In operation, a running device may be held in each hand and the runner may thrust both hands downward prior to landing and quickly bring the devices to a vertical stop after landing. Bringing the devices to a vertical stop may cause the moveable material to collide with the housing and increase the force exerted by the runner on the ground. A delay component may delay the peak force exerted by the material against the housing so that the translation of that force to the ground coincides with the peak force that the runner would have exerted against the ground in the absence of the devices.

Training equipment includes a hollow shaft having a sidewall defining an internal cavity and at least one polymer material filling at least a portion of the internal cavity. The polymer material may fill the entire internal cavity of the hollow shaft. The polymer material may be a visco-elastic polymer material or polyurethane. A spacer or a filler may fill at least a portion of the internal cavity. A method of making weighted training equipment with a hollow shaft having a sidewall defining an internal cavity may include injecting a curable composition into at least a portion of the internal cavity. The method may further include curing the curable composition into a polymer material.

A resilient exercise article includes an outer surface defining an interior chamber. The article comprises outward being one of a spherical shape, an ovoid shape or a double ovoid shape, at least one circumferential groove defined in the outer surface, and a bore extending axially through the article.

Apparatus, systems, and methods for executing a tire flip weight lifting exercise. The disclosed apparatus includes a chassis and a tire assembly that is lifted and flipped during the exercise. The tire assembly includes a support bar that extends through a tire. The tire assembly also includes bearing assemblies that engage arms of a torsion bar that is pivotable with respect to the chassis to provide for safe and controlled movement of the tire assembly during the lifting exercise. When the lift is completed, rollers engage the tire assembly so that the tire assembly can roll back to the starting position at least in part due to the force of gravity.

A fitness training bag provided in accordance with aspects of the present disclosure includes a body having an outer bag, and inner bag, and a filler. The outer bag encloses a first interior area therein and is water-permeable. The inner bag is disposed within the first interior area, encloses a second interior area therein, and is also water-permeable. The filler is disposed within second interior area and includes a plurality of pieces of material that are non-absorbent, drainable, and non-packable. At least some of the plurality of pieces of material are resiliently compressible so as to be shock-absorbing. At least one handle is stitched to the body. The at least one handle is configured to facilitate manipulation of the body to perform an exercise.

A exercise device, for example, and exercise ball device. The exercise device includes a frame and at least one panel or multiple panels.