Bradley, who will depart the club when his contract expires in the summer, praised his squad's commitment, even though their 26-22 defeat to Cardiff Blues last Friday keeps the Murrayfield outfit third bottom of the RaboDirect PRO12.
The team face Scarlets in Wales on Friday and Bradley said: "It's clear we're in desperate need of a win and the players have worked exceptionally hard, in some very vocal and physical training sessions, as we prepare mentally and physically to front up to one of the top teams in the division in their own back yard."
He went on: "The players are well aware that the performances haven't been up to scratch this season but I've been impressed by their resolve, their commitment and attention to detail in how they can improve and rally together."
The inclusion of Ben Cairns at outside-centre in place of the suspended Nick De Luca is the only change to the back division for the match at the Parc y Scarlets, while, in the pack, the release of David Denton from Scotland's RBS 6 Nations squad sees him back at number 8.
Prop Allan Jacobsen gets his first start at loose-head since January while hooker Steven Lawrie - a late withdrawal last weekend - has been passed fit to start the match.