This application discloses a portable exercise device for flexibility and strengthening. In some embodiments, the device is comprised of one elastic band of surgical tubing or like material and one non-elastic band, with two pairs of looped handles tied to each end of the elastic band. These looped handles can attach to a user's limb without any need for grasping. The non-elastic end of the device can be affixed to an anchor point. The exercise device offers light but adjustable resistance via a resistance modulator, allowing the user to engage in a full range of standing and seated exercises with forces comparable to swimming. In addition, two instances of the device can be combined to engage both the user's hands and feet simultaneously.

An adjustable weight shot system may include a core, inner and outer weight portions, and a body and cap. The inner weight portion may have two coupling hemispheres configured to receive the core in an inner weight portion cavity. Or the inner weight portion may be a hollow cylindrical portion configured to receive the core. The outer weight portion may have two coupling hemispheres configured to receive the inner weight portion in an outer weight portion cavity. Or the outer weight portion may be a hollow cylindrical portion configured to receive the inner weight portion. The body and cap may be configured to retainer the outer weight portion in a weight cavity defined by the body and cap.

An adjustable weight shot system may include a core, inner and outer weight portions, and a body and cap. The inner weight portion may have two coupling hemispheres configured to receive the core in an inner weight portion cavity. Or the inner weight portion may be a hollow cylindrical portion configured to receive the core. The outer weight portion may have two coupling hemispheres configured to receive the inner weight portion in an outer weight portion cavity. Or the outer weight portion may be a hollow cylindrical portion configured to receive the inner weight portion. The body and cap may be configured to retainer the outer weight portion in a weight cavity defined by the body and cap.

Training apparatuses are provided that include a substantially spherical, hollow shell formed from a pair of hemispherical portions. The hemispherical portions may each include an annular peripheral edge having a fastening mechanism, which may be adapted to provide rigidity and structure to the training apparatus. At least one hemispherical portion may further include a number of protrusions extending along an inner surface from the peripheral edge, the protrusions configured to provide structural support and durability to the training apparatus.

Training apparatuses are provided that include a substantially spherical, hollow shell formed from a pair of hemispherical portions. The hemispherical portions may each include an annular peripheral edge having a fastening mechanism, which may be adapted to provide rigidity and structure to the training apparatus. At least one hemispherical portion may further include a number of protrusions extending along an inner surface from the peripheral edge, the protrusions configured to provide structural support and durability to the training apparatus.

A gravity training ball includes a ball core unit having a predetermined weight specification, a buffer unit covering the ball core unit and made of a material having a shock absorbing effect, and an outer cover unit covering said buffer unit. The outer cover unit includes an outer cover layer covering the buffer unit.

A gravity training ball includes a ball core unit having a predetermined weight specification, a buffer unit covering the ball core unit and made of a material having a shock absorbing effect, and an outer cover unit covering said buffer unit. The outer cover unit includes an outer cover layer covering the buffer unit.

A pitch training device used to improve the throwing technique of balls used in sports. The device includes a core and a substantially disk-shaped body that provides immediate visual feedback as to whether the device was properly thrown. The core exhibits a density greater than the density of the body, thereby mimicking the moment of inertia of many sports balls. This, in turn, allows the user of the device to improve the training techniques used to increase spin efficiency of a ball while also helping train and improve other throwing techniques.

Exercise systems that include self-coupling weight pods that couple with one another to form weight clusters that a user can use in performing various body movements, such as exercise and conditioning movements. Each weight pod typically has a calibrated weight so that the user may know the amount of weight they are using. Each weight pod includes one or more coupling features that allow that weight pod to couple to one or more other weight pods and/or to an accessory, such as a strap. In some embodiments, each weight pod is soft so as to inhibit injury to a user of another close by the user. The weight pods can be used with one or more accessories, such as a strap, a bell bag that emulates a kettle bell, and a rucksack that can be configured to be a multifunctional component of an overall exercise system, among others.

Exercise systems that include self-coupling weight pods that couple with one another to form weight clusters that a user can use in performing various body movements, such as exercise and conditioning movements. Each weight pod typically has a calibrated weight so that the user may know the amount of weight they are using. Each weight pod includes one or more coupling features that allow that weight pod to couple to one or more other weight pods and/or to an accessory, such as a strap. In some embodiments, each weight pod is soft so as to inhibit injury to a user of another close by the user. The weight pods can be used with one or more accessories, such as a strap, a bell bag that emulates a kettle bell, and a rucksack that can be configured to be a multifunctional component of an overall exercise system, among others.