I'm not a medic - so please any medics feel free to correct me on this - but I've never heard of blood tests indicating a muscle strain. I have a feeling that that rumour comes from a similar supply chain as the much-missed Ben's Grandad's rumours.
Ok. Sort of makes more sense as we did turn things around post Luton to beat Palace 4-1 a few days later. SInce Fulham, we've won 1 PL match out of 7 and scored only 3 goals, of which 2 have been OGs!!