An information related to the position of an actuator coupled to a cable which is coupled to a motor is received. A filter is used to provide an input to a motor controller coupled to the motor, to adjust torque on the motor such that a strength curve is implemented relative to the position of the actuator.

An information related to the position of an actuator coupled to a cable which is coupled to a motor is received. A filter is used to provide an input to a motor controller coupled to the motor, to adjust torque on the motor such that a strength curve is implemented relative to the position of the actuator.

An endless rope trainer that includes an upright frame, a drive roller supported a distance above ground on the frame, an endless rope entrained around the drive roller, and a means of applying resistance to rotation of the drive roller. A pair of guide rollers are provided proximate the drive roller. The guide rollers pivot together as a unit about the axis of the drive roller independently of the drive roller for maintaining a constant wrap angle of contact of the endless rope on the drive roller regardless of pull angle on the endless rope.

An endless rope trainer that includes an upright frame, a drive roller supported a distance above ground on the frame, an endless rope entrained around the drive roller, and a means of applying resistance to rotation of the drive roller. A pair of guide rollers are provided proximate the drive roller. The guide rollers pivot together as a unit about the axis of the drive roller independently of the drive roller for maintaining a constant wrap angle of contact of the endless rope on the drive roller regardless of pull angle on the endless rope.

Technologies are described for aquatic resistance training. An aquatic resistance line may be deployed across the surface of a swimming pool. An aquatic resistance device may be deployed to ride along the resistance line when pulled by a swimmer. The aquatic resistance device comprises offset compression tensioners, each with a wedge-like geometry and a channel for the resistance line. The housing of the aquatic resistance device positions adjacent pairs of the offset compression tensioners into alternating orientation to one another. A mechanical compressor within the aquatic resistance device can force the offset compression tensioners against one another along the axis of the resistance line causing the alternating wedge-like geometries of the offset compression tensioners to force the offset compression tensioners off-axis from one another orthogonal to the aquatic resistance line into a configuration operable to adjustably grip the aquatic resistance line thus providing a resistive training load to the swimmer.

Technologies are described for aquatic resistance training. An aquatic resistance line may be deployed across the surface of a swimming pool. An aquatic resistance device may be deployed to ride along the resistance line when pulled by a swimmer. The aquatic resistance device comprises offset compression tensioners, each with a wedge-like geometry and a channel for the resistance line. The housing of the aquatic resistance device positions adjacent pairs of the offset compression tensioners into alternating orientation to one another. A mechanical compressor within the aquatic resistance device can force the offset compression tensioners against one another along the axis of the resistance line causing the alternating wedge-like geometries of the offset compression tensioners to force the offset compression tensioners off-axis from one another orthogonal to the aquatic resistance line into a configuration operable to adjustably grip the aquatic resistance line thus providing a resistive training load to the swimmer.

A frictional exercise device includes a shell body to be attached to a stationary object, for instance a door, a doorjamb or a floor, either directly or via a resistance band. A core cylinder in the shell body has an arcuate friction surface. A non-elastic strap winds partially around the core cylinder and hugs the friction surface. When said strap is pulled at one end, a frictional force between the friction surface and the strap opposes a movement of the strap across said friction surface. The magnitude of the frictional force is proportional to a resistive force applied at the opposite end. The arcuate friction surface is formed with a depression and adjoining elevations. A counterbrake projects towards the depression in the friction surface and deflects the strap towards the depression to define an undulating course of the strap along the friction surface and the counterbrake.

A frictional exercise device includes a shell body to be attached to a stationary object, for instance a door, a doorjamb or a floor, either directly or via a resistance band. A core cylinder in the shell body has an arcuate friction surface. A non-elastic strap winds partially around the core cylinder and hugs the friction surface. When said strap is pulled at one end, a frictional force between the friction surface and the strap opposes a movement of the strap across said friction surface. The magnitude of the frictional force is proportional to a resistive force applied at the opposite end. The arcuate friction surface is formed with a depression and adjoining elevations. A counterbrake projects towards the depression in the friction surface and deflects the strap towards the depression to define an undulating course of the strap along the friction surface and the counterbrake.

In a multi-functional storage container and fitness training system, a storage container of the system includes additional functionality and utility as one or more of a combination of a fitness exercise station, a portable cooler or personal storage container, and a platform to secure smart electronic devices thereon such as smartphones, tablet-like devices, and the like, providing a charging station function to charge these smart devices. The example system may alternatively be understood as a fitness exercise station having multi-functional utility beyond exercise, or a storage container having multi-functional utility beyond the storage of articles.

An information related to the position of an actuator coupled to a cable which is coupled to a motor is received. A filter is used to provide an input to a motor controller coupled to the motor, to adjust torque on the motor such that a strength curve is implemented relative to the position of the actuator.