User 4484
Guest
Really enjoyed Tom´s latest article. You Become What You Do. (Sort of)
Especially Kenneth Jays part below. IIRC he has ties to SF?
"With an increased HR to VO2 relationship it will never be as good as typical cardio exercises. It is simple physiology really. Increased heart rate decreases the time available to fill the left ventricle of the heart, which means that the left ventricle will contain and eject less blood per contraction. This means that the “stretching” of the heart wall, which is necessary to increase your stroke volume and your VO2, does not happen. It’s the Frank-Starling mechanism in full effect and it’s basic cardiorespiratory physiology. Moral of the story: STOP thinking you can ‘get your cardio in’ by lifting weights — no matter how fast you lift them!”
Especially Kenneth Jays part below. IIRC he has ties to SF?
"With an increased HR to VO2 relationship it will never be as good as typical cardio exercises. It is simple physiology really. Increased heart rate decreases the time available to fill the left ventricle of the heart, which means that the left ventricle will contain and eject less blood per contraction. This means that the “stretching” of the heart wall, which is necessary to increase your stroke volume and your VO2, does not happen. It’s the Frank-Starling mechanism in full effect and it’s basic cardiorespiratory physiology. Moral of the story: STOP thinking you can ‘get your cardio in’ by lifting weights — no matter how fast you lift them!”