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In this one, subjects performed resistance exercise and thereafter ingested a randomly assigned protein source of either insect protein (cricket), pea protein, or whey protein.
Even though serum concentrations of total, essential, and branched-chain amino acids were in general superior for whey versus insect and pea protein, no difference between protein sources was observed in the changes in protein expression of mTOR1C signaling.
Note that even though the protein drinks were similar in protein content, they were neither equal in calories, nor in fat content (which affects gastric emptying), so these are limitations that need to be considered.
In any case, serum concentrations of TAA, EAA, and BCAA were in general superior for whey versus the other protein sources, but no difference between protein sources was observed in the changes in protein expression of mTOR1C signaling proteins after either protein ingestion alone or combined with exercise.
Similar to other studies, the increase in protein expression of the mTORC signaling proteins was greater after protein ingestion and exercise combined compared to protein ingestion alone, demonstrating that both amino acids and exercise stimulate MPS in an additive manner.
Finally, insulin levels were higher after whey and pea protein ingestion, an effect that may be due to their relatively higher content of leucine and phenylalanine.
