As with much of the rest of the health and fitness world,
many fallacies exist around cardio. I
will do my best in this brief article to dispel some of those fallacies, and discuss
some of the considerations for how much and what type of cardio you should be
doing.
So what are some of the fallacies that exist??? When I think of cardio fallacies I think of
things like:
- More cardio will make me skinnier
- We need to do cardio to “burn” calories
- We need to do cardio to be in great shape
- Cardio makes us healthy
- The more cardio the better
Do you have any of these ideas about cardio? If so, keep reading and see if I can convince
you otherwise.
Will cardio make you skinny??? (A better question may be do
you even want to be skinny, but we’ll save that for another day.) Well, my answer would be a resounding
no! Follow me here for a second… Do you
have friends who are runners? If so, how
many of them are skinny? How many of
them are skinny fat (fairly small but soft and flabby), or maybe chubby? Have you ever sat by a jogging path and
looked at the people running by? How
many of them are skinny? How many are
skinny fat, or chubby? Skinny people
tend to gravitate towards running, the same way tall people gravitate towards
basketball, but running will not make you skinny anymore than basketball will
make you tall. I know runners, and often
watch people run on the waterfront in PDX, and what I see is much more skinny
fat people and chubby people, then skinny people. I know this is anecdotal, but there’s more to
come on why cardio doesn’t make you skinny.
The idea that you need to “burn” calories to lose weight, is
overly simplistic and mostly just useful for marketing gym memberships, fitness
classes, and fitness DVD’s. Guru’s argue
back and forth about whether or not the key to weight loss is as simple as take
in less than you burn, but even if it is that simple, doing high intensity cardio
to burn calories doesn’t make sense.
Here’s why it doesn’t make sense…
When you jump on the elliptical and go hard for 30 minutes, racking up 350
calories burned (as the machine tells you), you did some work! You leave tired, but you’re satisfied that
you burned 350 calories. The problem is
that even if the machine calculated your “burn” correctly (they often over
estimate), you still likely did less for your calorie burn than if you would
have spent 30 minutes lifting weights.
You see, 30 minutes of weight lifting may only burn 150 or 200 calories,
but the increase in your metabolism following that weightlifting session (EPOC-
http://en.wikipedia.org/wiki/Excess_post-exercise_oxygen_consumption)
can last as long as 38 hours after the session!
Additionally, building more muscle means that your resting metabolic
rate is increased every day you have that muscle. So, any way you slice it, you will likely
“burn” more calories with weightlifting than you would with cardio.
Do you need to do cardio to be in great “shape”??? Well, I guess that depends on how you define
cardio… The approach I recommend for
most people includes lots of low-level cardio (read: walking), and lots of
strength training. I would argue that
most people can get in just as good of shape with this approach as someone
who’s running regularly (or doing other mainstream forms of intense
cardio). They will not perform as well
on extended efforts (30-minutes or more), and they won’t be as proficient at
running (or Zumba or Spin) as someone who’s doing those things regularly. They will however perform nearly as well on a
VO2Max test (the gold standard for cardiovascular performance: http://en.wikipedia.org/wiki/VO2_max),
and they will avoid the overuse injuries and metabolic damage that can come
from large amounts of intense cardio (more on that in a future blog). They will also likely be much stronger than
the runner, and strength trumps all!
The idea that you need tons of cardio to be healthy is just
ludicrous to me! So much so, that I
don’t even want to address it, but I will.
Here’s my first piece of evidence that large amounts of cardio does not
make you healthier than other exercise:
Which one of these two people look healthier to you??? To me, one looks like a POW, and the other
looks like the peak of health! The
adaptations that occur in your body when you are doing large amounts of cardio
are very similar to those that happen as you die. Does muscle wasting and storing fat inside
muscle sound like health to you? Clearly
cardio doesn’t MAKE us healthy!
I’ve already touched around the fallacy of “the more cardio
the better” above, but I’ll briefly touch on it again. I don’t like that society has this
“everything in moderation” mentality because I think that’s total BS, but that
said, I think it’s clear that moderation is better in a lot of things. More cardio is not better, unless you’re
training for an endurance event. More
cardio will not necessarily help you lose fat faster, it won’t necessarily make
you healthier, and it won’t necessarily improve your fitness. We’ve covered this enough right???
So, who should do cardio, what kind of cardio should they
do, and why? As I said before I think
everyone should be strength training and doing lots of walking. These things will help everyone be healthier,
and leaner, and more fit. Beyond that,
the question gets more complicated…
Are you metabolically broken (read: obese), or suffering
from adrenal fatigue, hormone issues, or thyroid dysfunction? If any of those apply to you, then you are
best to not do any more exercise than what’s listed above. If you fit into any of those categories, you
need to clean up your diet, sleep, lift some weights, and walk, AND THAT’S
ALL! Once your
metabolic/hormonal/adrenal/thyroid issues are improved, you can begin adding in
some higher intensity work.
If you’re metabolically healthy, then adding in some higher
intensity work can be a great thing for you.
If want to train for an endurance event, go for it, but still do the
strength training and walking. If you
just want to be healthy, or you want to lose some fat, adding in some high
intensity interval work once or twice a week might be great for you. Studies show that high intensity work can be
great for metabolism, VO2Max, and other indicators of health and fitness, so if
you’re not metabolically broken this could be a good thing to add into your
routine.
I hope I’ve proved my point to you that more cardio isn’t
better, and not everyone needs any more cardio than just daily walking. Did this article clear things up for you, or
just make you more confused? What
questions do you have about application of cardio?