what r ya do'n ta your self?
Where do the calories come from at a specified intensity level and how does this effect metabolism?
Answer these questions and you will plainly see that some variation in exercise protocol can co-exist!
Sprints place a high demand on glycogen stores just like resistance training. This is great for glucose metabolism but bad for knees and possible higher cortisol release leading to negative nitrogen balance. Not too much or else skinny, skinny, skinny and lean. Oh yea, and sick more often...yuck!
Low intensity cardio promotes a greater percentage of fat expenditure but requires a greater time commitment. Doesn't help glucose metabolism much though...
SIDE TRACK- What's wrong with the dieticians that tell the type-2 diabetics to do cardio when they should be pushing a heavy bar in the gym? “Lets slooooowly burn some fat but we won't fix the real problem”. Stupid!
Anyway to summarize, low intensity will burn fat and maintain muscle and is easy on the ware-out body parts. Interval training will promote better glucose metabolism and burn a little fat. Run on grass and keep your real knee joints away from the cutting surgeons for most of your life.
To the point, both are good but the truth is that in moderation, the combination can't be beaten!
Brent D.
P.S. Yes, cutting and surgeon in the same sentence is a redundancy