Forget about heart rate.
Calories used = Work Done = Force*Distance.
This means that you can circuit train all you want and lift 50kg bench press for 15 reps or whatever.
Lets assume the bar travels 1 metre in a typical bench press.
Force*Distance says that 50*(1*15)=750
Or you're benching 100 for just 8 reps.
100*(1*8)=800.
So as you can see, you'll actually burn more lifting the heavier weight, with the added effect of actual strength development.
Cardio is only useful for people who want to be runners.
High reps low weight is only useful for people who want to be rock climbers or something else requiring high muscle endurance.
But in terms of fat burn, all you're doing is wasting your time doing something thats not as good as something else just because it feels different.
Calories used = Work Done = Force*Distance.
This means that you can circuit train all you want and lift 50kg bench press for 15 reps or whatever.
Lets assume the bar travels 1 metre in a typical bench press.
Force*Distance says that 50*(1*15)=750
Or you're benching 100 for just 8 reps.
100*(1*8)=800.
So as you can see, you'll actually burn more lifting the heavier weight, with the added effect of actual strength development.
Cardio is only useful for people who want to be runners.
High reps low weight is only useful for people who want to be rock climbers or something else requiring high muscle endurance.
But in terms of fat burn, all you're doing is wasting your time doing something thats not as good as something else just because it feels different.
