Implants that stimulate adrenal gland on demand

I would quite like to have implants that stimulate adrenal glands on demand. The ability to stimulate the adrenal glands (releasing adrenaline) would make training harder easier, making it easier to be fitter and healthier.

Such implants should be possible with today's technology - it's not dissimilar to a pace maker, but with some kind of remote control (e.g. via Bluetooth).

Obviously it's essential that safety mechanisms are built in, to prevent hacking and over-stimulation.

Another possible use of the implants would be as an alternative to an alarm clock - allowing the user to have an energetic start to the day.