Add Yahoo as a preferred source to see more of our stories on Google. Person doing jumping jacks workout Look, I’m gonna be straight with you – those online calculators that tell you exactly how many ...

The number of calories jumping jacks burn can vary depending on factors like weight, speed, duration, and metabolism. You can increase calorie burn by raising intensity, either doing more reps at a ...

Look, I used to think those “100 jumping jacks = 10 calories” calculators were gospel. Then I started paying attention to real people doing real workouts, and wow – was I wrong. Those generic formulas ...