King Grub
2016-09-08, 08:48
INTRODUCTION:
We investigated the impact of whey protein hydrolysate and maltodextrin (WPH) intake on intramuscular connective tissue (IMCT) protein fractional synthesis rate (FSR) after maximal shortening and lengthening contractions.
METHODS:
Young men were randomized to receive either WPH or maltodextrin (CHO) immediately after completion of unilateral shortening and lengthening knee extensions. Ring-13 C6 -phenylalanine was infused, and muscle biopsies were obtained. IMCT protein FSR was measured from 1-5, as well as 1-3 and 3-5h after contractions and nutrient intake.
RESULTS:
During the 1-3h recovery, lengthening contractions resulted in a higher FSR than shortening contractions (P<0.01) independent of supplementation type, and during the 3-5h recovery, WPH had a higher FSR than CHO (P<0.05), independent of prior contraction mode.
CONCLUSIONS:
The later appearance of a stimulating effect of WPH on the IMCT FSR after strenuous muscle contractions lends support to its ability to promote recovery of the muscle connective tissue matrix after exercise.
Muscle Nerve. 2016 Sep 7. Contraction mode and whey protein intake affect the synthesis rate of intramuscular connective tissue.
We investigated the impact of whey protein hydrolysate and maltodextrin (WPH) intake on intramuscular connective tissue (IMCT) protein fractional synthesis rate (FSR) after maximal shortening and lengthening contractions.
METHODS:
Young men were randomized to receive either WPH or maltodextrin (CHO) immediately after completion of unilateral shortening and lengthening knee extensions. Ring-13 C6 -phenylalanine was infused, and muscle biopsies were obtained. IMCT protein FSR was measured from 1-5, as well as 1-3 and 3-5h after contractions and nutrient intake.
RESULTS:
During the 1-3h recovery, lengthening contractions resulted in a higher FSR than shortening contractions (P<0.01) independent of supplementation type, and during the 3-5h recovery, WPH had a higher FSR than CHO (P<0.05), independent of prior contraction mode.
CONCLUSIONS:
The later appearance of a stimulating effect of WPH on the IMCT FSR after strenuous muscle contractions lends support to its ability to promote recovery of the muscle connective tissue matrix after exercise.
Muscle Nerve. 2016 Sep 7. Contraction mode and whey protein intake affect the synthesis rate of intramuscular connective tissue.