ENDURANCE-NUTRITION-PROTEIN & CARBS-BIKING


NOTE: VIDEOS AT BOTTOM OF PAGE


BIKING 


1


PROTEIN LEUCINE FED DOSE – EFFECTS OF MUSCLE PROTEIN SYNTHESIS AFTER ENDURANCE BIKING EXERCISE


Rowlands DS1Nelson ARPhillips SMFaulkner JAClarke JBurd NAMoore DStellingwerff T
DESIGN
– Protein-leucine following strenuous endurance exercise accentuates muscle protein synthesis and improves recovery of muscle performance
12 trained men completed 100 min of high-intensity cycling, then ingested either:
(1) 70/15/180/30g protein/leucine/carbohydrate/fat (15LEU)
(2) 23/5/180/30g (5LEU)
(3) 0/0/274/30g (CON) beverages
– Randomised order in 4 servings during the first 90 min of a 240-min recovery period
RESULTS
(1) The 33% (90%CL ±12%) increase in MPS with 5LEU vs. CON represented near-maximal FSR stimulation
(2) Tripling protein-leucine dose (15LEU) negligibly increased FSR (13% ±12% vs. 5LEU)
CONCLUSION:
– 23 g protein with 5 g added leucine achieved near-maximal MPS after endurance exercise


LEUCINE ENRICHED SUPPLEMENT DURING MODERATE STEADY STATE EXERCISE ENHANCES POST-EXERCISE MUSCLE PROTEIN SYNTHESIS


Pasiakos SM1McClung HLMcClung JPMargolis LMAndersen NECloutier GJPikosky MARood JCFielding RAYoung AJ.
DESIGN:
– 8 adults completed 2 separate bouts of cycle ergometry for 60 min, 60% VO(2)peak
10 g EAA drinks with different leucine contents [leucine-enriched (l)-EAA,
(1) L-EAA, 3.5 g leucine
(2) EAA, 1.87 g leucine] were consumed during exercise
RESULTS:
(1) Muscle Protein Synthesis MPS was 33% greater after L-EAA (0.08 ± 0.01%/h) than after consumption of EAA (0.06 ± 0.01%/h)
(2) Whole-body protein breakdown and synthesis were lower and oxidation was greater after consumption of L-EAA than after consumption of EAA


BCAAs AND INDICATORS OF MUSCLE DAMAGE AFTER ENDURANCE BIKING EXERCISE


Greer BK1Woodard JLWhite JPArguello EMHaymes EM.
– Determine whether BCAAs reduces muscle damage during endurance exercise as compared with a carbohydrate (CHO) beverage or placebo (PLAC) beverage
– 9 untrained men performed 3X90 min cycling bouts at 55% VO 2peak.
– Drank a total of 200 kcal of energy via the CHO or BCAA beverage before and at 60 min of exercise, or they drank the PLAC beverage
– BCAAS attenuate muscle damage during prolonged endurance exercise in untrained college-age men


PROTEIN-LEUCINE ACTIVATES A REGENERATIVE INFLAMMO-MYOGENIC-TRANSCRIPTOME IN MUSCLE FOLLOWING INTENSE ENDURANCE BIKING EXERCISE


Rowlands DS1Nelson AR2Raymond F3Metairon S3Mansourian R3Clarke J4Stellingwerff T5Phillips SM6.
INTRODUCTION
– Protein-leucine following strenuous endurance exercise accentuates skeletal-muscle protein synthesis and adaptive molecular responses, but underlying transcriptome is uncharacterized
DESIGN
12 trained men completed 100 min of high-intensity cycling then ingested either:
(a) 70/15/180/30g protein/leucine/carbohydrate/fat (15LEU)
(b) 23/5/180/30g (5LEU)
(c) 0/0/274/30g (CON) beverages during the first 90 min of a 240-min recovery period.
CONCLUSION
– PRO-leucine ingestion modulates inflammatory-myogenic regenerative processes during skeletal muscle recovery from endurance exercise


NITROGEN BALANCE IN ENDURANCE TRAINED BIKING & TRIATHLETE WOMEN


Stuart Douglas Houltham, David S. Rowlands
PURPOSE:
(1) Indirect estimates of the mean daily protein requirement for female endurance athletes are 1.2–1.4 g·kg·day
DESIGN:
– A 72-h nitrogen balance was determined for 10 female cyclists and triathletes training for 10.8 h·wk following 2 habituated protein intakes:
(1)  Normal habitual (NH) (protein 85 g·day)
(2)  Isocaloric high-protein (HP) (2-fold increase in protein)
RESULTS
– Estimated mean protein requirement was 1.63 g·kg·day




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