ฝึกพูดภาษาอังกฤษด้วยเทคนิค Shadowing จากวิดีโอ: Dr. Stacy Sims: How To Do HIIT Without Spiking Your Cortisol
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1
I think you've just split HIIT up into two broad categories.
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EMOM or EMOM, every minute on the minute,
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where it was kind of this four minutes of maybe not max intensity,
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but you're working hard with these different exercises and then you're having a minute off.
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So four minutes on, one minute off.
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And you contrasted that with sprint interval training
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or SIT where it's kind of 30 seconds on as hard as you can and two to three minutes off.
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You've just been through the specific benefits of sprint interval training.
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How does that compare to EMOM every minute on the minute?
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Is it the same?
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Is it similar?
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Or are there, you know, some quite significant differences in the adaptations that we are going to get?
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Yes.
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So if we're looking at the HIIT interval, so high intensity.
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Can I just pause you there, Stacey?
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So I've got this clear in my head.
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HIIT is the umbrella term, right?
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Which there's many ways of doing HIIT.
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One way of doing HIIT is sprint interval training.
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Another way is EMOM.
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Is that accurate?
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B-mom is a type of workout in there.
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High-intensity interval training is the umbrella term.
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Sprint interval training is a subset of that umbrella term.
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The other half of that is what people typically think of as HIIT,
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where we are doing between one and four minutes of work at 80% to 90%
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or an eight to nine on the scale of one to 10, and we have one to two minutes recovery between those intervals.
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So another form of HIIT that is beneficial.
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Yeah, okay, got it.
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So when we look at that, it's more, you're spending more time in intensity, that's not quite as high as sprint interval.
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So you have more of a calorie bearing, which people are concerned about for some weight loss.
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You also are creating a greater time under stress that's going to improve mitochondrial health.
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And we're also improving blood flow because we have more time of muscle perfusion.
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So that means we're gonna get the impetus for building more red cell,
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more plasma volume, and having better blood pressure control and actual change of blood flow.
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So when we're looking at what's happening from a little bit lower intensity
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and having more time under tension or more time under intensity,
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it is truly a metabolic response for muscle perfusion.
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So that means more blood flow to the muscle, more oxygen carrying capacity, more calorie burn.
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And you're also building more lean mass in that time frame
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because you need more muscle to be able to do the activity.
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The other thing about that little bit lower intensity, longer duration is the post-exercise response.
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So we look at post-exercise response.
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This is the big thing that we hear a lot is perimenopausal, postmenopausal women shouldn't do HIIT training because it increases cortisol.
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So there's a caveat in there.
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If you're going to hit class, they try to fill the class up 45 to 60 minutes.
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You can't hold proper intensity that long.
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So you will get an increase in cortisol because cortisol is released during exercise.
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But you won't get the post-exercise response that you need to bring it down.
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Because in that 45 to 60 minute class, you really aren't doing high intensity work.
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you're in moderate intensity.
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You're in that gray zone.
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So if I bring it back and say, we're going to do it properly, where we're doing two rounds of four minutes with one minute off,
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and you're going to really work to maintain that intensity.
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Post-exercise, you get a boost of growth hormone and testosterone, that drop cortisol.
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So just like your resting heart rate starts to drop as you get fitter over three to four weeks,
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your baseline cortisol drops over time.
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So now you are not as sympathetically driven.
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You can get out of that tired but wired state and have better ability to hit parasympathetic responses.
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So this is where we have the nuance of what is
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really high intensity interval training versus what is the fitness world projecting high intensity interval training
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and that's why i'm like
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when we're talking about it we have to be very specific in what
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that intensity is and how long we're holding it
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because a true hit class shouldn't be any more than 30
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minutes you have a little bit of warm-up you do true intensity and recovery
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and they have a little bit of a cool down a
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true sprint interval session might be 10 minutes total where you
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have a warm-up you do a couple of true intervals with the recovery
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and a little cool down it doesn't take a lot of time
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but they're both very powerful yeah this is great
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because as we've already acknowledged many people many women feel time pressured and actually
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a lot of your recommendations are very very time efficient um you know really time efficient
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and i think there's a really interesting point
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that i just want to highlight we're basically saying
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that there are certain hormonal changes
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that happen as a woman approaches menopause there are things
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that you can do with specific forms of exercise to mitigate the effects off that.
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One of those things is this high intensity type work.
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But if you're not careful, you won't do it correctly and you'll end up in moderate intensity.
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So moderate intensity is not giving you the stimuli that you are wanting from the high intensity.
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And I guess relating to what what you just said, because I think a lot about the stress load of exercise in an already busy,
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stressed out population.
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I know for me, for example, and we'll probably get to zone two in just a minute,
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one of the things I enjoy doing is doing one hour on my indoor carol bike at very low intensity.
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I might listen to a podcast, I might prepare for a podcast, I might whatever, because I know it's a very low stress load on my system.
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It keeps me pretty parasympathetic and doesn't drive me into sympathetic and it doesn't take me long to recover from that.
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but what was really interesting what you said true hit true
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high intensity although it feels very intense actually is not driving you into
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that sympathetic overly stressed state after the workout it's helping you come down into parasympathetic into
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that relaxation state that's a kind of critical point i think for people to understand
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because it's this whole you know stressed out, we're tired and wired, we can't switch off.
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High intensity is actually going to potentially help with that, isn't it?
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Absolutely.
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And that's the thing, that's a messaging that gets mixed up when we talk about it in the fitness world.
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Because there's this big push for high intensity interval training, because we see that gives the best body composition outcomes.
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But when it's not done correctly, we see so many women that get overstressed, they get injured, They maintain that tired but wired.
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They don't see results.
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But when you pull it back and you actually hit it hard when you need to hit it hard, recover properly from that, then hit it hard again and recover,
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then you do get that post-exercise response because your body's like, whoa, that was a really strong stress.
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I need to be able to overcome it.
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So I need to repair the tissues, drop the inflammation, drop the oxidation,
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and I need to be able to fully relax to garner that adaptation.
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So we see women who are doing true HIIT training, then subsequently sleep better.
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If you sleep better, then everything gets better.
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Thank you.
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Vocabulary and speaking notes for this lesson
This C1 speaking lesson is built on the video “Dr. Stacy Sims: How To Do HIIT Without Spiking Your Cortisol”. The speaker keeps coming back to these words: intensity, interval, training, Hiit, exercise. This video has 106 sentences and 1292 words to shadow. The speech runs for 9:07. The speaker talks at a steady 142 words per minute, a comfortable pace for shadowing. 83% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
The 15 most advanced words in the video, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| interval noun | /ˈɪntɚvəl/ | A distance in space. |
| sprint noun | /spɹɪnt/ | A short race at top speed. |
| cortisol noun | /ˈkoɹ.tɪˌsɔl/ | A glucocorticoid steroid hormone produced by the adrenal cortex that mediates various metabolic processes (such as gluconeogenesis), has anti-inflammatory and… |
| distress noun | /dɪˈstɹɛs/ | Physical or emotional discomfort, suffering, or alarm, particularly of a more acute nature. |
| parasympathetic adjective | /ˌpɛɹ.ə.sɪm.pəˈθɛt.ɪk/ | Of or relating to the part of the autonomic nervous system that inhibits or opposes the effects of the sympathetic nervous system. It consists of nerves… |
| umbrella noun | /ʌmˈbɹɛl.ə/ | A cloth-covered frame used for protection against rain or sun. |
| perfusion noun | /pəɹˈfjuʒən/ | The act of perfusing, the passage of fluid through the circulatory system. |
| calorie noun | /ˈkæləɹi/ | A non-SI unit of energy, equivalent to 4.184 kilojoules, that can raise the temperature of a kilogram of water by one degree Celsius. This is the unit normally… |
| sympathetic adjective | /ˌsɪm.pəˈθɛt.ɪk/ | Of, related to, feeling, showing, or characterized by sympathy. |
| adaptation noun | /ˌæd.æpˈteɪ.ʃən/ | The process of adapting something or becoming adapted to a situation; adjustment, modification. |
| workout noun | /ˈwɝk.aʊ̯t/ | An exercise session; a period of physical exercise. |
| caveat noun | /ˈkæviɑt/ | A warning. |
| hormonal adjective | /hɔɹˈmoʊnəl/ | Pertaining to hormones. |
| impetus noun | /ˈɪm.pə.təs/ | Anything that impels; a stimulating factor. |
| injure verb | /ˈɪn.d͡ʒɚ/ | To wound or cause physical harm to a living creature. |
Phrasal verbs you will hear
| Word | Pronunciation | Meaning |
|---|---|---|
| cool down verb | /kuːl ˈdaʊn/ | To become cooler; to be reduced in temperature. |
| stress out verb | To become stressed. | |
| warm up verb | /ˌwɔː(ɹ)m ˈʌp/ | To become warmer. |
| get out of verb | To leave, exit or escape from; to become free of. | |
| mix up verb | To mix or blend thoroughly and completely. | |
| switch off verb | To stop or disable a device by turning a switch or a lever. |
Pronunciation to watch
The speaker uses 40 contractions and reduced forms, such as we're, you're, doesn't. Say them the short way, as you hear them.
- The “th” sounds: parasympathetic /ˌpɛɹ.ə.sɪm.pəˈθɛt.ɪk/, sympathetic /ˌsɪm.pəˈθɛt.ɪk/, sympathetically /sɪmpəˈθɛtɪk(ə)li/
- The “sh” and “zh” sounds: perfusion /pəɹˈfjuʒən/, adaptation /ˌæd.æpˈteɪ.ʃən/, oxidation /ɒksɪˈdeɪʃ(ə)n/, relaxation /rᵻˌlækˈseɪ.ʃən/, inflammation /ɪnfləˈmeɪ̯ʃən/
- Long words — get the stress right: parasympathetic /ˌpɛɹ.ə.sɪm.pəˈθɛt.ɪk/, sympathetic /ˌsɪm.pəˈθɛt.ɪk/, adaptation /ˌæd.æpˈteɪ.ʃən/, mitochondrial /ˌmaɪ.təˈkɑːn.dɹi.əl/, oxidation /ɒksɪˈdeɪʃ(ə)n/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like interval, sprint, cortisol.
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