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Research: Training for power, and more on recovery
Written by Matt Vickers   
Thursday, 20 December 2007
Following on from the first research news post, we have some more findings on ways to maximise recovery and a study on training protocols for power.
 

Article 1

Here's a novel approach to clearing the lactate from your legs after training, engage your core stabilising muscles. Navalta and Hrncir looked into whether standard core body exercises would speed up recovery (through lactate removal) after an intense 30s sprint on an exercise bike.1 They found that when compared to quiet resting, lactate removal was significantly quickened by 5 minutes of simple core body exercises. We can't show you the images of the 3 exercises from the article, so here are some we're allowed* to use, demonstrating 2 of the exercises.

Image of supine bridge exercise

2 seconds up, 2 seconds hold, 4 seconds down

 Image of prone bridge exercise

Hold for 8 seconds

A proposed reason for this is that the exercises encourage blood flow to the core muscles, these muscles are mostly slow-twitch fibres and thus have a good ability to do aerobic respiration. Aerobic respiration is the process that is able to re-use the lactate in our blood to get energy. Therefore, the exercises send blood high in lactate to muscles that can do a good job of removing it quickly.

So there you go, I now expect to see riders doing bridging exercises after each race to improve their recovery between races ;-)

Article 2

Our second report today focuses on what sort of resistance training is best for generating the most lower-limb power improvements. Participants were tested in 20, 40 and 60 yard running sprints, vertical jump, standing broad jump and agility (T-Agility test). They then completed 4 weeks of either heavy-resistance training, plyometrics, or complex training. With the exception of vertical jump (where plyometrics alone was best), all measures were improved the most by complex training.2 The results of the study are likely to hold true over the long term, but what's great is that we know that if you only have a short time to improve your power, the combined approach of heavy-resistance and plyometrics is really valuable.

 

1. Navalta, J., & Hrncir, S Jnr. (2007). Core stabilization exercises enhance lactate clearance following high-intensity exercise. Journal of Strength and Conditioning Research, 21(4), 1305-1309.

2. Dodd, D., & Alvar, B. (2007). Analysis of acute explosive training modalities to improve lower-body power in baseball players. Journal of Strength and Conditioning Research, 21(4), 1177-1182.

*  Lehman, G., Hoda, W., & Oliver, S. (2005). Trunk muscle activity during bridging exercises on and off a swissball. Chiropractic and Osteopathy, 13(14), pages no. unknown. Licensed under Creative Commons 2 License .

Last Updated ( Saturday, 24 May 2008 )
 
Research: Recovery & Warm-Up
Written by Matt Vickers   
Tuesday, 18 December 2007

I have decided to start reporting on some of the scientific literature available in exercise science, hopefully in a way that doesn't require you to decipher it too much. To get you started, I have a couple of related articles to report on. If there are any specific topics you would like recent information on, feel free to use the Contact Us page to send an email.

Article 1

A team of researchers in Brazil have discovered that along with the liver, heart, brain and limb muscles, the muscles that help you breath can help clear lactate from your blood after intense exercise.1 Chiappa and associates found that participants' blood lactate was approximately 16% lower after 9 minutes of recovery when a load (resistance) was applied to their chest to make breathing harder. They concluded that the lung muscles are very good at metabolising lactate during below-maximal exercise.

For BMXers, this provides more evidence that we need to do a gradual warm-down after each race, as this keeps our breathing rate up and our slow-twitch fibres working to remove the lactate from our legs more quickly.

Article 2

Want the most power down the first straight? You need to warm up. Research of different preparations on sprint performance of elite, young rugby players in NSW has revealed warming up as the best method compared to stretching, no preparation and stretching + warm-up.2 The results showed that 40m sprint times (approx. 5-6 seconds) were best after a warm-up alone, although warm-up + stretching together showed positive results and stretching alone was better than no preparation.

Before you race, don't just sit around. Get those legs moving gently, increasing your work rate as the race approaches. I suggest making sure you take it easy in the last couple of minutes before a race though.

 

  1. Chiappa, G., Rodeguini, B., Alves, C., Ferlin, E., Neder, J., & Ribeiro, J. (2008). Blood lactate during recovery from intense exercise: Impact of inspiratory loading. Medicine & Science in Sport & Exercise, 40(1), 111-116.

  2. Stewart, M., Adams, R., Alonso, A., Van Koesveld, B., & Campbell, S. (2007). Warm-up or stretch as preparation for sprint performance? Journal of Science and Medicine in Sport, 10, 403-410.


Note: Chiappa et al., to be published in print January 2008. Article retrieved online ahead of print, Mon 17 Dec, 2007.


Last Updated ( Wednesday, 19 December 2007 )
 
Keeping Hydrated
Written by Matt Vickers   
Monday, 22 October 2007

With hot weather upon us all around the country, it's time to talk about hydration and controlling our body heat. Keeping your fluids up is important all year round, but it becomes even more important during Summer, when our bodies struggle to keep their core temperature within safe levels and we can find it hard to replace what we lose.

Let's start off with a few technicalities, then get into what they mean for you.

  • The stomach can only empty up to about 800ml of fluid per hour
  • Every Kilogram of bodyweight lost during exercise equals approximately 1 Litre of fluid loss
  • You can lose about 40ml of fluid per minute just through sweating
  • Human thirst comes on slowly, you may already be dehydrated by the time you're thirsty1
  • There are things you can do to maximise the benefits of every drink you have (read on to see how)

 

Last Updated ( Sunday, 16 December 2007 )
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