it is not control. Rely on the sensors in the simulators, too - they do not measure accurately, the relative calculation system is built in.
The best option is to buy a heart rate monitor (like a wristwatch with a chest strap) I use Sigma myself (German, everything works, the issue price is up to 2500 optimal models) Models 25.10 or 15.11 are completely - we are looking for it on the Yandex.market.
On the heart rate monitor itself, there are both preset ranges and individual ones - customizable, going beyond the range either lower or higher, it will let you know. So a number of simulators take readings directly from the sensor - displaying it on the screen.

Nothing tricky - the load is light, cool - get high., after another release of endorphins will be noticeable - it is very captivating to train later.

3. REST.
In general, the same as with the meat-set.
Sleep at least 6 hours, 8-9 in a good way.
Don't push yourself too hard outside of your workouts.
Try to organize life so as not to burn out psychologically, drying is already difficult, especially the 1st time.

4. METABOLIC RATE.
We go to the laboratory and take tests for thyroid hormones (they are also thyroid hormones, T3, T4, triiodothyron, thyroxine), doctors are in courses. We get results, if everything is within the normal range - congratulations, do not worry - you are healthy. If not, we go to the endocrinologist, we are engaged in correction, treatment, he knows better.
Because if violations - it is worth starting with this, you will slip because of the hormonal background.

Acceleration if everything is in order:
1. Nutrition - because high-protein enough - it is enough to put it according to the calculated formulas. Up to a bunch of omega-3s.
2. Sports. supplements - fat-burning complexes, due to both the content of energy drinks and other components. Improved lipolysis, thermogenic effect, etc. Read what it is.
3. Caffeine separately, tea, coffee and other sources.
4. Bath, sauna - we are looking for special techniques.
... other lotions, but less effective.
thyroid hormones - do not eat, ruin your health, there are enough examples of smart people.

5. CONTROL OF RESULTS.
.napolnye scales, not a miracle with arrows, but modern electronic ones - measured 2-3 times a week, in the morning on an empty stomach, of course, not in full dress.
anthropometry - measuring the volume of the body, at least the stomach, ass and legs. - here once a week.
Photo - 2 times a month. Front back side.
We keep a record, preferably in electronic form.