I could guess the group of people you are talking about.. but then another group of people will start talking about what they think i guessed.. then people will start guessing themselves whether in a group or not... and we will end up with such a plethora of guesses we'll need more people to group them all together for us... that and there is always the chance I may know the answer but i can't group my thoughts together people...
there seems to be an issue with a lot of reposted apostrophe's, I've been trying to unpost them but don't quote me on that, we'll never get rid of "them"
Snipes or Harrelson might be able to answer that topical question.
BTW, several websites offer cal.-burn.-calculators, such as this one:
https://captaincalculator.com/health/calorie/calories-burned-basketball-calculator/ .