I lift weights. I get tired. My pulse rate never goes up, so it is not aerobic exercise.
On a good day you might spend 80 minutes to do 20 actual one-minute sets and rest between each set.
So do you consider this to be 20 minutes of calorie burn? Most of the measurements of calorie burning I see are for aerobic exertion where the heart rate goes up. A few results that are hard to web-search come up for things like "resistance training calories burned."
I am cutting out the difficult stuff, so if you care about that, click the link and read the whole thing.
I don't understand this totally but most readers probably have more background knowledge than I do:
Weightlifting training has the characteristic feature that in a training session lasting from 1.5 to 2.5 hours the actual hands-on-the-bar time will amount to only five to twelve minutes. But in this short time a lifter may move anywhere from four to twenty metric tons and even more. This is a lot of work.
Traditionally, that work was measured in total kilos lifted. Over the years this was found to be an easy way to measure, but not an accurate one in regards to energy expended. With greater research it has been found that the energy expenditure in a given workout will depend on not one, but three different things: the bodyweight of the lifter, the skill level of the lifter, and the particular exercise performed.
After warming up, with the lifter’s body is fully prepared for the coming training session, the amount of energy expenditure of mid-level lifters varies from 0.98 (56kg lifters) to 4.6 kcal/minute (super-heavyweights). It is therefore apparent that there exists a close correlation between your bodyweight category and your corresponding amount of energy expenditure.
On average the energy expenditure, after warming up, of mid-level lifters is 2.78 kcal/minute. A similar dependence of the amount of the energy expenditure on weight is noted in elite lifters as well, although their average level is lower, only 2.21 kcal/minute. This is to be expected due to the increased technical efficiency of the more experienced elite lifters.
It can be readily seen that lighter lifters are more efficient than heavy ones for every skill level, while at the same time all lifters do improve their efficiency as their skill level goes up. So it may be possible that an elite lifter will use less energy in a workout even though he or she is lifting much more than a less skilled one would.
The amount of energy expenditure while performing the same work (work meaning the resistance in kilograms times distance lifted in meters) differs as well when we consider the character of the exercises. Therefore, for comparison of their energy capacity the term specific energy expenditure (SEE) is utilized - the quantity of energy needed for performing work per kilogram-meter (cal/KgM). In this way we can measure the efficiency according to input and output. In short, the amount of given output, measured in resistance-meters, in some exercises requires more energy input than it does in others.
the energy expenditure of a heavy weightlifter may be 30% higher than in a 56 kg weight, but in mid-level lifters it is on average 43% higher than that with elite lifters.
The SEE of an exercise performed as a single is 35% higher than those made during multiple rep performances. This is because you can become very efficient with repetitions, taking advantage of the stretch reflex or eccentric movement at the start of the lift.
In one training session, the energy expenditure of an elite lifter can reach 1,500 or more kilocalories, while that of a mid-level lifter is 1,200 kcal or more. On the surface it would indicate that the elite performers are not working that much more than mediocre lifters - but you now know that this does not tell the whole story. Upon closer analysis this is explained by the fact that despite their improved technical efficiency, the training load of a qualified lifter, as measured in both number of lifts and average intensity, is so much larger.
So from this we can see that the amount of energy expended by weightlifters will depend on a number of factors ....