My legs and arms don't really tire when I work on the Heavy bag rather my whole midsection. It feels like I just ran a few miles not really a muscular fatigue. On the Heavy Bag, I focus on working my jab and throwing 90+ power punches per round. I only do 3 rounds on the heavy bag. Any tips to solve this problem with my core?
Running long distance will help develop those core muscles you speak of, there are other exercises but running is the first thing that comes to mind. Then you can do planks, think jump rope may work your core some.
This was back in July of last year. As of now I do core work as well as an entire strength and conditioning routine. But for the sake of the thread and non members reading this lets say I don't.
Planks, decline crunches, leg lifts, bicycle crunches, medicine ball twists and burpees should do the trick breh.
Do 1 set of 10 or 20 and repeat as many as you'd like. That method had always worked for me for ab exercises.
Isometric core exercise like the plank and variations of the plank improve "core endurance". I'd be sceptical that the problem isn't with cardiovascular endurance rather than core endurance, but these types of exercises are good to put in your strength programme anyhow.