a) I find it quite boring to do endless cardio indoors - most of my cardio has been outdoors, bike rides, long walks and jogging but unfortunately the weather has turned recently
b) my legs and glutes are in the process of recovery after doing a 2 hour leg workout yesterday and I need to give them them time to fully recover - so I didn't fancy doing any endurance activities using these muscles
The solution?..................High Intensity Interval Training using battle ropes and a 20kg slam ball that uses mainly upper body and core muscles to raise the heart rate quickly, followed by a rest interval, then repeat. I did 20 seconds all out effort on both rope variants, then 15 maximum effort ball slams, followed by 80 seconds rest - repeated 8 times.
I estimated that I burned 300 calories in approximately 20 minutes, about the same as a 40 minute walk on the treadmill. Try it for a bit of time saving, added spice and variety to your cardio workouts!