1. A training device for swimmers, comprising; a framework including a vertically disposed front frame section and a vertically disposed after frame section having a body support fixed against relative movement therebetween and to receive a swimmer in an elevated prone position thereon, said body support affording body trunk support only and relative freedom of leg and arm movement at opposite ends thereof for a swimmer disposed thereon, and independent variable pull-force resistant means provided on said frame sections and having pulley connected ropes engaged thereto and disposed for independent hand and foot activation by a swimmer for swimming muscle development and coordination control, said frame sections including vertical support members at each corner and said pull-force resistant means including variable weights supported by said pulley connected ropes for vertical movements relative to said vertical support members, including weight cages provided on said vertical supports and disposed to contain and guide said weights in the course of their vertical movement, said weight cages being pivotally mounted on said vertical members and having an open side for ready access to said weights by being swung open sidewardly.

2. A training device for swimmers, comprising; a framework including a vertically disposed front frame section and a vertically disposed after frame section having a body support fixed against relative movement therebetween and to receive a swimmer in an elevated prone position thereon, said body support affording body trunk support only and relative freedom of leg and arm movement at opposite ends thereof for a swimmer disposed thereon, and independent variable pull-force resistant means provided on said frame sections and having pulley connected ropes engaged thereto and disposed for independent hand and foot activation by a swimmer for swimming muscle development and coordination control, said frame sections including vertical support members at each corner and said pull-force resistant means including variable weights supported by said pulley connected ropes for vertical movement relative to said vertical support members, including sets of pulleys provided on said frame sections and including one pair on said front frame section disposed together in relatively close spaced relation and in relative horizontal alignment with and forwardly of said body support for said hand activated pulley connected ropes and to require simulated forward pulling arm strokes by a swimmer in the use thereof.

3. A training device for swimmers, comprising; a framework including vertically dispOsed relatively open rectangular end frame sections having longitudinally disposed rails connected therebetween to provide a relatively open box-like space therewithin; a cross rail provided on one of said end frame sections and having a horizontally disposed rail and supporting leg connected centrally thereto and a body supporting member fixedly mounted against relative movement on top of said horizontally disposed rail to receive a swimmer in an elevated prone position between said frame sections and to afford relative freedom of arm and leg movement within said framework, a first set of rope pulleys provided at each of the corners of said end frame sections, a weight cage and a free hanging weight provided in each of said weight cages at each of the corners of said end frame sections, a second set of rope pulleys provided on each of said end frame sections in relative horizontal alignment with said first set of rope pulleys and in close spaced proximity centrally of said end frame sections and relatively spaced above said body support near opposite ends thereof, foot receptive slings having pulley ropes engaged thereto and reeved through said pulleys sets on the end frame section behind said body support and engaged to said weights in said weight cages on said end frame section, a third set of rope pulleys provided on the cross rail of the other of said end frame sections relatively under the second set of rope pulleys provided thereon in relative horizontal alignment with and forwardly of said body supporting member, and a pair of hand hold grips having pulley ropes engaged thereto and reeved through said pulley sets on said forwardly disposed end frame section, said foot receptive slings and said hand hold grips being disposed for activation by a swimmer on said body support and for raising and lowering the weights connected thereto in the simulation of dry land swimming exercises.