Alkalisers And Buffers Flashcards
During high intensity exercise what happens to ph and why
Increased concentration of h ions cause decreased ph
How does H ions cause fatigue
Impair calcium release
Binds to troponin impairs cross bridging cycle
ATPase and other enzyme inhibition
What happens to potassium levels in venous plasma
Increases
What happens to potassium in the interstitial fluid
Increase
What happens to potassium in intercellular
Decreases
In relation to potassium response why happens to sodium levels
Opposite effect
Dose size of sodium bicarbonate
0.3
What does sodium bicarbonate do
Decreases h ion concentration
Decreases potassium levels
Improved mean peak power
Improved power output for 1min all put sprint by 1.7%
What does sodium bicarbonate have the biggest effect size on overall give 1,2 and 3 highest
1-single bout
2-short length
3-long lenghr
What does sodium bicarbonate have the biggest effect size on for trained
1-long
What does sodium bicarbonate have the biggest effect size on for untrained
1-short length
2-medium length
3- single bout
What is the dose size for sodium bicarbonate and timing
0.3-0.5g
60-90 mins pre event
In summary what is sodium bicarbonate best for
1 min high intensity
What causes variation in results
Training status
Gi symptoms
Which fibre type has the most carnosine
Type 2
What reduces carnosine levels
Ageing
Is there a sex difference in carnosine levels
Yes males have more
What is a rate limiting factor for carnosine
B-alainie
What two substances fight for absorption
Taurine and b-alainine
What does too much b-alanine cause
Parastessia
Recommended dose for b-alainine
6.4 grams per day
A raise of how much in carnosine can yield benefits
50%
How many grams of b-alainine does it take to reach 50% carnosine and how long
230g
- 4 x 34 days
- 6 x 160 days
How much of b-alainine is washed out each week
2%
How much carnosine is in the muscle
5-10 mM
How much buffering in the muscle is due to carnosine
10%
6g b-alanine a day for 4 and 10 weeks causes a rise in carnosine by how much
60% and 80%
B-alainine causes a increase in force production in type 2 fibres when
At lower frequencies
Benefits of b-alainine supplementation are
Improved time to exhaustion
Improved total work done
Improved training adaptations
Calcium handling
When are the main benefits seen
Over 60s duration events
What are the improvements for sodium bicarbonate, b-alainine and the combined
- 5%
- 1%
- 2%
