| 摘要 |
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.
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