Any decent fitness tracker will track heart rate accurately and give a reasonable approximation of calorie burn. Avoid the no-name ones off Amazon or eBay, but something like a Huawei Band 7 will do the job perfectly well for about £40.

https://www.techradar.com/reviews/huawei-band-7

https://www.amazon.co.uk/dp/B0B2K7JP78/

>>6144
Polar are the original market leaders and innovators. Garmin and their ANT+ ecosystem have completely taken over. Both companies produce very high quality and accurate HRMs and associated software to track results. Ignore all other brands.

I am a huge believer in HRM technology for fitness - I've used it in the past to lose over 16kg in 6 months and also run the London Marathon and survive, with relatively little training.

Depending on what exercise you're mostly doing, one of the Garmin chest straps is about 50 quid, and their watches start from about 100 quid upwards - all are good, its the Garmin software and website (and associated integrations to other fitness software) that you're buying.

>a good heart rate monitor to use during cardio
It's for drugs and extreme sex, isn't it? A few of those publicly placed defribulators were stolen around my city not long ago.

>>6147
>publicly placed [defibrillators]
I walked past one recently, and it's in a cabinet with a combination lock. The instructions it gives are "if locked, call 999 to ask for the code". Because what you really need when you're having a heart attack is someone running back and forth fannying about because they can't open the box with the defib in it. It's fine, folks. It's not like a delay of one minute is going to knock 10 points off the chances of survival or anything.

>>6148
Yeah, because being delayed by one minute is much worse than there being no defibrillator at all due to it being stolen.

>>6149
Those locks/units aren't particularly effective against thieves.

They probably want you to dial 999 to walk you through the process more than anything.

And yep, here's one seemingly with no lock but the same instructions.

Delaying the phone call delays the arrival of qualified first aiders. They certainly don't want amateurs getting caught up in the moment and forgetting to call the cavalry.

>>6148
I hadn't seen this either and pointed it out to the friend I was visiting, but apparently it's common practice. You're not going to defibrillate yourself anyway, but they do indeed lock them. My friend had to use one once, and found that someone had changed the code and not told anyone. Luckily, a passing doctor saved the dying pedestrian in some other way, but it's still not ideal.

>>6150

It'll stop opportunists or the bored and unless there's a thriving market for stolen defibrillators that's enough. I imagine it won't be done in places with lower crime rates.

>>6153

When I was 14, I definitely would have nicked a defibrillator from an unlocked cabinet and tried to shock my mate with it. Not proud of it, but I was a knobhead.

>>6153
>This consensus statement was agreed and adopted by the Community Resuscitation Steering Group for England in November 2015. This replaces the previous statement made jointly by the Resuscitation Council (UK) and BHF and is considered applicable in all four nations.

>There is concern that a defibrillator in an unlocked cabinet may be stolen or tampered with, making it unavailable or of no use to a person in cardiac arrest. However, despite widespread use of unlocked cabinets, experience to date has shown that instances of theft and vandalism of such defibrillators are relatively uncommon.

>Locking a cabinet is no guarantee that a defibrillator will not be stolen or vandalised. Locking a defibrillator in a cabinet implies that it is sufficiently valuable to be worth stealing. Reports from ambulance services and other sources provide no evidence that public-access defibrillators in locked cabinets are less likely to be stolen or vandalised.

>>6155

Then they're wrong to do it but I bet that's the logic anyway.