Fitness training apparatus, and computer-implemented method and system of fitness training

Abstract

Exemplary embodiments provide a coupling device for connecting a handle or other accessory to a fitness training apparatus. The coupling device may include a head, a body, at least one latch a first attachment, and/or other components. The head may have a pin with a catch. The body may have a mating portion to receive the pin of the head therein and form a mating connection between the head and the body. The at least one latch may be in the mating portion of the body. The at least one latch may lock into the catch on the pin to removably secure the mating connection between the head and the body. The first attachment on either of the head or the body may connect a retractable line of the fitness training apparatus.

1 . A coupling device for connecting a handle or other accessory to a fitness training apparatus, comprising:
 a head having a pin with a catch;   a body having a mating portion to receive the pin of the head therein and form a mating connection between the head and the body;   
       at least one latch in the mating portion of the body, the at least one latch locking into the catch on the pin to removably secure the mating connection between the head and the body; and 
       a first attachment on either of the head or the body, to connect a retractable line of the fitness training apparatus. 
     
     
         2 . The coupling device of  claim 1 , further comprising a second attachment on either of the head or the body, the second attachment to connect the handle or other accessory of the fitness training apparatus. 
     
     
         3 . The coupling device of  claim 2 , wherein the second attachment is an opening formed through the head. 
     
     
         4 . The coupling device of  claim 2 , wherein the second attachment is formed as part of the handle or other accessory of the fitness training apparatus. 
     
     
         5 . The coupling device of  claim 1 , wherein the head is provided on a base of the fitness training apparatus. 
     
     
         6 . The coupling device of  claim 1 , further comprising a webbing material to attach the head to a handle or other accessory of the fitness training apparatus. 
     
     
         7 . The coupling device of  claim 1 , wherein the retractable line is provided already connected to the first attachment. 
     
     
         8 . The coupling device of  claim 1 , further comprising a hook formed on the catch of the pin to tighten the catch against the latch when a pulling force is applied to the pin. 
     
     
         9 . The coupling device of  claim 1 , further comprising at least one biasing element in the mating portion of the body, the at least one biasing element providing a biasing force against the at least one latch to retain the at least one latch in a closed position. 
     
     
         10 . The coupling device of  claim 1 , further comprising:
 a separator in the mating portion of the body;   a sleeve around at least a portion of an outside of the body, the sleeve connected through the body to the separator in the mating portion of the body.   
     
     
         11 . The coupling device of  claim 10 , wherein the separator is movable by the sleeve against the at least one latch to open the at least one latch against the biasing force of the biasing element. 
     
     
         12 . The coupling device of  claim 10 , wherein the separator is a wedge. 
     
     
         13 . The coupling device of  claim 10 , wherein the at least one biasing mechanism is at least one spring. 
     
     
         14 . The coupling device of  claim 1 , wherein the first attachment comprises a cavity formed in a core of the body to retain an end of the retractable line of the fitness training apparatus. 
     
     
         15 . The coupling device of  claim 14 , further comprising an opening formed through the core of the body and into the cavity, wherein a diameter of the opening is smaller than a diameter of the cavity. 
     
     
         16 . The coupling device of  claim 15 , further comprising a tapered passage between the opening and the cavity. 
     
     
         17 . The coupling device of  claim 16 , wherein the retractable line of the fitness training apparatus extends through the opening formed through the core of the body, the retractable line further extends through the tapered passage and into the cavity formed in the core of the body to be retained within the cavity of the body. 
     
     
         18 . The coupling device of  claim 1 , wherein the catch is an indent formed in the pin. 
     
     
         19 . The coupling device of  claim 1 , wherein the sleeve extends around a full outer circumference of the body. 
     
     
         20 . The coupling device of  claim 1 , further comprising a top plate for an upper portion of the body, wherein the at least one latch is installed into the mating portion of the body before assembling the top plate onto the upper portion of the body. 
     
     
         21 . The coupling device of  claim 20 , wherein a knotted end of the retractable line of the fitness training apparatus is installed into the body before installing the at least one latch into the mating portion of the body and before assembling the top plate onto the upper portion of the body. 
     
     
         22 . The coupling device of  claim 20 , wherein the top plate is removable for servicing the at least one latch and/or the retractable line of the fitness training apparatus. 
     
     
         23 . The coupling device of  claim 20 , wherein the top plate is threaded onto the upper portion of the body.