Skeletal muscle signalling was analysed using methods as previously published53 (link). The following antibodies were used for the detection of total or phosphorylated protein levels: Hexokinase II (sc 6521), GLUT4 (Abcam 654; samples unboiled), OXPHOS (Abcam 110413), p-Akt Ser473 (CST 9271), p-AMPK (CST 2531), p-ERK 1/2 (CST 4370), p-SEK1/MKK4 (CST 4514), p-P38 (CST 4511), p-JNK (CST 4668), p-SMAD2-L (CST 3104) and p-P70S6K T421/S424 (CST 9204). All primary antibodies were used at 1:1,000 dilution in TBST, with the exception of p-SMAD2-L, which was diluted at 1:500.