A training device includes a pair of limb encircling cuffs with an elastic band
therebetween. On each cuff is a buckle for releasably attaching one end of the
tension band thereto. Each buckle includes a frame with a slidable latch therein,
the latch having a locking post movable between a first seated and a second unseated
position. A ring fastener at the end of the band encircles the seat such that movement
of the post to its seated position extends the post through the ring. Movement
of the post to the seated position is provided by expansion of a spring as previously
compressed by the unseated latch.
