Showing posts with label sleep. Show all posts
Showing posts with label sleep. Show all posts

Monday, 22 February 2021

Adenosine, Sleep Pressure, and Caffeine - Matthew Walker

 

Adenosine, Sleep Pressure, and Caffeine - Matthew Walker

Some things I took away from Matthew Walkers great book Why We Sleep, on adenosine, sleep pressure, caffeine.


Adenosine is the chemical that builds up in your brain.


The longer you are awake, the more it builds up. This increases your desire to sleep. This is what is known as sleep pressure. After 12 to 16 hours this has built up enough for us to go to sleep.


Caffeine takes up the receptor sites of the adenosine which blocks and inactivates the receptors. This then blocks the sleeping signal normally communicated to the brain by adenosine.


Caffeine has a half life of 5 to 7 hours. So a coffee at 6pm could still have 50% of the caffeine in your system at 11pm to 1am. And that's only halfway of getting the caffeine out of the system, don't forget.


Whilst caffeine is in the system, adenosine is still accumulating. So once the liver clears out the caffeine, you now have the sleepiness you had 2 hours before the coffee plus the additional build up of adenosine whilst on the caffeine. Once the caffeine leaves the receptors, the adenosine rushes in and you feel more sleepy than before.

Saturday, 12 September 2020

Weekly Education Review

 Each week our coaches learn about certain topics which we then discuss as a group. This week:


Milenko soft tissue:

Milenko spoke about why using a trigger point combined with movement of the muscle works better to release the tissue you are targeting. This is what Kelly Starrett would call "Smash and Floss".


You apply pressure to an area of painful tissue and move the limb around in all different directions, through as much range as possible. It is like you are trying to perform your own version of Active Release Technique (ART) or trigger point therapy.


The movement is trying to "unglue" the deep mechanical restrictions of the tissue and restore the sliding surfaces.

Sarah sleep:

Sarah gave us a good review of what she learned about sleep.

  • You should try to keep your circadian rhythm – this is achieved by waking with the sun and going to bed a couple of hours after it goes down.

  • Manage light exposure – get blue light in the morning to wake you up / become alert. Early sun exposure is really good. Block blue light of a night to help prepare for sleep. Light sensors in the eye will be tricked by blue light into thinking it is still daytime. Blue light will suppress melatonin, which is a hormone that helps us fall asleep.

  • Sleep improves your memory. If you learn something and then sleep or nap afterwards you will retain more information.

  • Sleeping pills can be addictive. You also don’t go through all the sleep stages, so it isn’t quality sleep.

Some other circadian resets are the timing of your meals and exercise.

A good book on circadian rhythm is the circadian code by Sachin Panda https://www.amazon.com.au/Circadian-Code-weight-supercharge-energy/dp/1785042017/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1599944691&sr=8-1

The best book on sleep is Matthew Walker’s Why We Sleep in my opinion. It explains the why’s and links poor sleep to so many health concerns. https://www.amazon.com.au/Why-We-Sleep-Unlocking-Dreams/dp/1501144324/ref=sr_1_1?dchild=1&keywords=matthew+walker&qid=1599944812&sr=8-1

Some articles on sleep we have put on the site:

https://www.totalhealthperformance.com.au/post/2017/01/17/sleep-and-memory

https://www.totalhealthperformance.com.au/post/2017/08/01/sleep-more-to-increase-speed-and-performance

https://www.totalhealthperformance.com.au/post/2017/09/23/keeping-a-regular-sleep-routine-improves-health

https://www.totalhealthperformance.com.au/post/lack-of-sleep-and-it-s-impact-on-hormone-levels

https://www.totalhealthperformance.com.au/post/2018/07/31/sleep-to-lower-your-risk-of-injury

https://www.totalhealthperformance.com.au/post/benefits-of-napping

Toby mechanical advantage technique:

Toby talked about the 1RM front squat straight into the back squat for as many reps as possible.

  • This is a way to prolong the time under tension on the muscles.

  • It is an accumulation technique for a relative strength phase when done like this. You could use it for relative strength and also functional hypertrophy.

  • If you wanted to use it for hypertrophy you could do mechanical advantage drop sets. Basically you take the hardest variation of a lift and then work towards the easiest. An example workout could be:

A1 – Pull Ups – 5 x 6-8, 40X0, 10 seconds rest

A2 – Chin Ups – 5 x max (maybe 1 or 2), 40X0, 10 seconds rest

A3 – Chin Ups Neutral Grip – 5 x Max (maybe 1 or 2), 40X0, 120 rest

Monday, 4 May 2020

Lack of Sleep and It's Impact on Hormone Levels

Lack of Sleep and It's Impact on Hormone Levels

If you aren't getting enough quality sleep each night, the chances of you having optimal hormonal levels are quite low. Lack of sleep can decrease thyroid, testosterone, and growth hormone.
Poor sleep for just one week can lower testosterone by 10-15%. This was sleeping 5 hours per night in young healthy men. I know a lot of people who are running off 5-6 hours of sleep and wonder why they aren't able to build mass or gain as much strength as they like. Something as simple as sleep is more than likely the issue.

If you throw in alcohol along with lack of sleep, which a lot of people do on Friday and Saturday nights and you will see enormous impacts on your hormonal levels. You will not perform well in the gym or at training for your sport come Monday and chances of injury are much higher.

You will never maximize your results with less than optimal testosterone levels. You have to get your lifestyle in order.

I have harped on about the importance of sleep a lot but it is because without it, you are missing out on huge performance gains. Instead of arguing over whether you should take 5g of creatine pre-workout, during, or post, you would be much better off prioritizing your sleep. But people love to look for excuses instead of just doing what is required. It is simple but takes discipline. Get all the basic things in place and do them consistently for 10 years.

Related
Benefits of napping
Sleep more to increase speed and performance
Sleep to lower your risk of injury

Saturday, 11 April 2020

Benefits of Napping

Taking a nap seems to be a very natural thing to want to do. With our current lifestyles, with work, school, and other commitments, we tend to just keep pushing through and never actually stop. The corona virus lock down has given me much more time than I normally have and every day around 12pm-1pm I feel the need to lie down and rest. With time on my hands, I have been. I don’t even really nap for long. It could be 5 minutes up to 30 minutes, but I have noticed just lying down and closing my eyes for a small amount of time refreshes me enough to be more productive in the afternoon than if I just push through.

This is not new information. The Romans napped, countries in the Mediterranean napped, Leonardo Da Vinci, Albert Einstein, and Isaac Newton napped, bodybuilders have talked about naps and them helping muscle growth for many years, but it is something I have consistently been able to do for a couple of weeks now and I think it is definitely something we should all try to incorporate in some way once our lives return back to being crazy busy again.

The most important thing to remember though is that a nap can’t replace night time sleep. You have to sleep well of a night. There is no compromise.

Athletes need between 8-10 hours of sleep a night but not many of them are getting that amount. Simply by getting more sleep you can enhance your performance by 2-5% from some estimates.

Dr Marc Bubbs highlights some good stats on the negative impacts lack of sleep can have in his book Peak. Lack of sleep reduces your ability to tolerate pain, lowering it by 10%. If you don’t get 8 hours of sleep a night you are 1.7 times more likely to get injured than some who does get 8 hours of sleep per night. Lack of sleep also increases the chance of you getting sick. Less than 7 hours of sleep and you are 3 times more likely to get sick than someone sleeping 7 hours, if you sleep less than 6 hours then it was 4.5 times as likely you would get sick.

Plus, lack of sleep can increase body fat levels, lower your testosterone, DHEA, and growth hormone levels, can increase insulin and cortisol levels, lead to poor memory, and increase inflammation, so that is why quality sleep is a non-negotiable.

Naps are used as a bit of an energy boost, a reset, or to help ADD to your daily sleep time. Not replace it.

Some of the benefits of napping, as Sara Mednick points out in here book Take A Nap, include:

  • Increasing your mental alertness
  • Speed up motor performance
  • Improve your accuracy
  • Make better decisions
  • Improve your stamina
  • Improve your mood
  • Reduce stress
  • Boost creativity
  • Help your memory

The time you wake up of a morning will determine when the best time to take a nap is for you. There is a lot of science that goes into this which take into account all the stages of sleep, but there are some good general recommendations that are simple to follow. The simplest is when you feel like taking a nap naturally. That is generally between 1 and 3pm for most of us. If you wake up at 5am then it will be closer to 1pm whereas if you wake up later at say 8am, it would be around 2.30pm for example.

You can also time your nap so that you wake up with a more creative mindset or prioritise your memory.

A full sleep cycle last 90 minutes. Many experts suggest that a 90-minute nap is the perfect amount time as you go through a full sleep cycle. If you are an athlete, using a longer nap like this on rest days can really help your recovery.

If you feel groggy when you wake up then you could be waking up in the middle of slow wave sleep, so you may just have to adjust the duration of your nap. Taking a shorter 20-30 minute nap should work well for this.

If you can’t sleep during the day, don’t worry about it. Just lay down, close your eyes, and relax for 20-30 minutes. It will still be of benefit.

Personally, by recovering properly, my strength is improving at a much faster rate then when living my normal routine. Try napping for a few weeks and see how you progress.

Related: