King Grub
2017-04-25, 08:15
This study investigated the plasma concentration of glucose, insulin and amino acids, key metabolic regulators of recovery from exercise. In randomised order, seven active men (aged 26.2 (SD 6.1) years) undertook 90 (SD 3) min of cycle exercise in the heat followed by a metered replacement volume of milk (0.1% Skimmed Milk, Glanbia Consumer foods Ireland Plc; trial M) or carbohydrate-electrolyte (Powerade, Coca Cola Ltd, London, UK; trial CE) solution, equivalent to 150% of the BM loss, consumed within 2–3 h(1). Blood glucose, insulin and total (AA) and essential (EAA) amino acids were measured post exercise and serially for 5 h during recovery (REC).
A greater change in plasma glucose was observed in CE compared to M during REC (P= 0.494). Compared to post-exercise values, mean glucose did not change during REC in M, but increased from 4.8 (SD 0.4) to 6.4 (SD 1.2) mmol/l (P<0.017) 1 h into REC in CE. In response, recovery peak insulin increased approximately 4-fold (191 (SD 83) to 761 (SD 296) pg/ml; P<0.001) 1 h into REC in CE and approximately 3-fold (236 (SD 187) to 610 (SD 270); P<0.001) at 2 h into REC in M. No difference was observed in the overall insulin response between M and CE during REC (P= 0.774) (Figure 1).
A higher overall total and essential amino acid concentration was observed during recovery in M than CE (P<0.001). Compared to post-exercise values, mean AA and EAA decreased on average by 20 (SD 5) % over the time course of REC in CE but increased by 39 (SD 6%) in M, remaining elevated throughout the 5 h period of recovery. Plasma leucine mirrored the EAA response, decreasing on average by 30 (SD 11) % in CE (P>0.05) and increasing by 59 (SD 10%) in M (P<0.001) (Figure 1).
Prolonged exercise challenges fluid balance, glycogen reserves and amino acid oxidation(2). After exercise, fluid, glucose and amino acids, particularly the essential amino acids (EAAs), are required in support of fluid balance, glycogen repletion, tissue repair and remodelling. A recovery beverage should, therefore, fulfil both fluid and nutrient requirements. These data suggest a metered approach to recovery with 0.1% fat milk, rather than carbohydrate-electrolyte solution, acts as a more effective recovery strategy following prolonged exercise.
Plasma Amino Acid, Glucose and Insulin Response to a Metered Intake of Milk or Carbohydrate-Electrolyte Solution during 5 h Recovery from Exercise in Healthy Active Young Men. April 2017, The FASEB Journal vol. 31 no. 1 Supplement 795.1.
http://www.fasebj.org/content/31/1_Supplement/795.1.abstract?sid=33de1d9c-8802-47cb-98d5-9241e54d6ca5
A greater change in plasma glucose was observed in CE compared to M during REC (P= 0.494). Compared to post-exercise values, mean glucose did not change during REC in M, but increased from 4.8 (SD 0.4) to 6.4 (SD 1.2) mmol/l (P<0.017) 1 h into REC in CE. In response, recovery peak insulin increased approximately 4-fold (191 (SD 83) to 761 (SD 296) pg/ml; P<0.001) 1 h into REC in CE and approximately 3-fold (236 (SD 187) to 610 (SD 270); P<0.001) at 2 h into REC in M. No difference was observed in the overall insulin response between M and CE during REC (P= 0.774) (Figure 1).
A higher overall total and essential amino acid concentration was observed during recovery in M than CE (P<0.001). Compared to post-exercise values, mean AA and EAA decreased on average by 20 (SD 5) % over the time course of REC in CE but increased by 39 (SD 6%) in M, remaining elevated throughout the 5 h period of recovery. Plasma leucine mirrored the EAA response, decreasing on average by 30 (SD 11) % in CE (P>0.05) and increasing by 59 (SD 10%) in M (P<0.001) (Figure 1).
Prolonged exercise challenges fluid balance, glycogen reserves and amino acid oxidation(2). After exercise, fluid, glucose and amino acids, particularly the essential amino acids (EAAs), are required in support of fluid balance, glycogen repletion, tissue repair and remodelling. A recovery beverage should, therefore, fulfil both fluid and nutrient requirements. These data suggest a metered approach to recovery with 0.1% fat milk, rather than carbohydrate-electrolyte solution, acts as a more effective recovery strategy following prolonged exercise.
Plasma Amino Acid, Glucose and Insulin Response to a Metered Intake of Milk or Carbohydrate-Electrolyte Solution during 5 h Recovery from Exercise in Healthy Active Young Men. April 2017, The FASEB Journal vol. 31 no. 1 Supplement 795.1.
http://www.fasebj.org/content/31/1_Supplement/795.1.abstract?sid=33de1d9c-8802-47cb-98d5-9241e54d6ca5