Berlei podium bra.
If it weren't for the racer back with all the hardware attached, I'd totally buy one of those. Lying on strap adjusters for prolonged periods is nearly but not quite as type-2 fun as cycling in wet jeans.
Random number generation is often about the connection to your chest, rather than the transmitter. I recommend the use of gel as per DCRainmaker's recommendations rather than just wetting the contacts.
I molished an ECG with heartrate counter as a GSCE electronics project
[1]. What can I say - I was young and optimistic.
Even after a tame medic stole me some proper pads and gel from the hospital, the connection was still flaky enough that you had to stay still for an entire sampling period
[2] in order for the reading to be non-random. You also had to position yourself carefully to minimise pickup of random induced noise from whatever else was going on in the room. Jogging on the spot or other heartrate-raising activities were right out.
Lessons learned: Humans are an excellent source of noise. Advanced averaging and smoothing algorithms require an understanding of microprocessors. You can never have too much micropore. Pay attention to what you're re-wiring when your chest is part of the circuit.
[1] This came in handy many years later when a theatre nurse tried to patronise me by describing the ECG as a 'special telly'.
[2] It was a primitive count-for-n-seconds-and-multiply algorithm, done in 45-series logic on a series of breadboards.
