SN Carb 2 references

bethdrysdale94's version from 2017-06-02 14:33

Section 1

Question Answer
Coyle 1986: detailspostpone of fatigue in highly trained athletes fed CHO during prolonged strenuous exercise is associated with a slowing of MG depletion
Coyle 1986: methodcycle at 71% VO2max to fatigue, whilst ingesting PLA/GLUC solution (cross-over)
Coyle 1986: resultsCHO feeding = exercise for an additional hour before fatigue, little reliance on MG during this hour. capable of oxidising CHO at relatively high rates from sources other than MG during latter stages of exercise

Section 2

Question Answer
Bergstrom 1967: detailslook at diet, MG and exercise performance
Bergstrom 1967: methodhard exercise to deplete muscle glycogen. then different diets (low CHO, mixed, and high CHO). Bicycle ergometer@75% VO2max to exhaustion
Bergstrom 1967: resultsaverage work time high>mixed>low. there is a correlation between work time and initial MG content. Glycogen content of working muscle is a determinant for the capacity to perform long-term heavy exercise. MG content can be varied by different diets after glycogen depletion

Section 3

Question Answer
Sherman 1981: details effect of 3 exercise-diet regimes on MG supercompensation and subsequent performance during a 20.9km run
Sherman 1981: method5 day depletion taper (73% VO2max on treadmill). Trial A: 3days Low, 3 days High. Trial B: 3d medium 3d high. Trial C: 6d medium. rest day after each, then 20.9km run
Sherman 1981: dietslow CHO = 15%. medium CHO = 50%, high CHO = 70%
Sherman 1981: resultsTrials A&B used more MG than C, little to no diff between A&B. No Diff in run times or post-performance run glyc levels between trials
Sherman 1981: conclusionsMG can be elevated with moderate ex-diet regime. initial MG levels influence the amount subsequently utilised during exercise. CHO loading is of no benefit to performance trained runners during 20.9km

Section 4

Question Answer
Bussau 2002: detailspossible to achieve max MG in less than 3 days
Bussau 2002: method8 endurance trained athletes (male). 10g/kg/d high CHO foods with high glucose for 3 days whilst remaining physically inactive. muscle biopsies taken prior to CHO loading, 1& 3 days after eating high CHO
Bussau 2002: resultsMG content increased drastically after 24 h (and remained stable for 2 more days) - physical inactivity and high CHO = max MG in 24h

Section 5

Question Answer
Ivy 1988: detailstime of CHO ingestion on MG synthesis after exercise
Ivy 1988: methodcycle ergometer 70 mins (including 6x2min intervals), 2 occasions, CHO solution immediately post-ex or 2h post-ex. muscle biopsies from VL muscle @ 0,2&4h post-ex
Ivy 1988: resultsdelaying ingestion of CHO supp post-ex will decrease rate of MG storage

Section 6

Question Answer
Hansen 2005: details skeletal muscle adaptation, training 2x every 2nd day or training once daily
Hansen 2005: method7 healthy untrained men. knee extensor ex with 1 leg in low glyc and 1 leg in high glyc training.
Hansen 2005: training daysday1 = both legs trained for 1h, 2h rest, then low leg trained for 1h. day 2 = only one leg (high) trained for an hour. repeat days 1&2 for 10 weeks
Hansen 2005: resultsidentical increased max workload for both legs. TTE increased in low leg more than high leg. resting MG increased significantly in low (greater enzymes eg CS in low leg, training adaptation). training every second day may be superior to daily training.

Section 7

Question Answer
Hulston 2010: detailseffects of training with low MG on exercise performance, substrate metabolism and skeletal muscle adaption.
Hulston 2010: method2 groups, high and low GLYC training. 9 aerobic and 9 HIIT sessions during 3 weeks. (high trained everyday alternate exercises, low trained every second day both exercises). measured resting muscle biopsy, metabolic measures during cycling and a TT.
Hulston 2010: resultstraining with low MG decreased training intensity. no more effective than high for performance. Low increased fat oxidation with low MG. (? increased metabolic adaptations in SKM)

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