Need help determining calories burned

larowe27

Hi Everyone,

I am an advid volleyball player and play in tournaments most weekend. I have been playing for many many years. It is compettitive volleyball, and I am struggling trying to determine how many calories I would possibly burn during a tournament. It is not uncommon for me to play anywhere from 12-17 games in a single day.
The MFP app states 342 calories for 30 min played. There are days where I play up to 3-5 hours of volleyball which can equal out to between 2700 - 3700 calories burned.
Somehow, I dont think I woudl burn that many, especially where I've been playing for so many years.
Any ideas how I could more accurately measure this? I currently do not have any devices that would do this for me.
Thoughts?