lactate inflection point & recovery week 11. obla onset of blood lactate accumulation at rest,...
TRANSCRIPT
![Page 1: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/1.jpg)
LACTATE INFLECTION POINT & RECOVERY
Week 11
![Page 2: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/2.jpg)
OBLA
Onset of Blood Lactate AccumulationAt rest, everyone has lactic acid in their
musclesWhen exercise begins the muscular levels
of lactic acid begin to riseThe level of hydrogen ions (H+) also riseThis is known as OBLA
![Page 3: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/3.jpg)
Lactate Threshold
Now better known as Lactate Inflection Point (LIP)
Lactic acid production is greater than lactic acid removal
At exercise intensities beyond the LIP blood lactic acid concentration increases
Beyond the lactate threshold/LIP the athlete has to stop or reduce muscle effort
Trained athletes can and aim to increase their tolerance to lactic acid accumulation
![Page 4: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/4.jpg)
Determining the LT/LIP
Scientific testing in labs (eg: AIS) is the best method
Some rough estimates are in table 2.3, p.76 Untrained athlete ~60% max HR Trained athlete ~90% max HR
![Page 5: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/5.jpg)
Determining the LT/LIP
VO2 max
• Untrained athlete: LIP = ~50% VO2 max
• Trained athlete: LIP = ~75-80% VO2max
![Page 6: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/6.jpg)
![Page 7: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/7.jpg)
LIP & Fatigue
Exercise intensities beyond the LIP are associated with fatigue
The greater the exercise intensity above the inflection point, the more rapid the fatigue
This fatigue is generally considered to be a consequence of a greater reliance on the anaerobic systems to supply the adenosine triphosphate (ATP) and the resultant accumulation of the by-products of anaerobic metabolism Lactic acid and hydrogen ions
![Page 8: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/8.jpg)
Lactic Acid Removal/Recovery
When lactic acid builds up an active recovery is best
Keep moving and keep HR slightly elevated This keeps blood flow higher to help break down
lactic acid Lactic acid pyruvic acid ATP (Kreb’s cycle) Lactic acid is now thought to have some
positive effect on performance When oxygen is available it can help to produce
ATP See fig. 2.17, p.78
![Page 9: LACTATE INFLECTION POINT & RECOVERY Week 11. OBLA Onset of Blood Lactate Accumulation At rest, everyone has lactic acid in their muscles When exercise](https://reader036.vdocument.in/reader036/viewer/2022082816/56649ce55503460f949b318c/html5/thumbnails/9.jpg)
Learning Activities
Activity 8, p.77Newspaper article, p.79