Fit in my 40s: ‘My DNA test results are in. How did I do?

I congratulate myself - but then spot the mistake in my analysis

Remember my DNA test a few weeks ago? I got my results back from FitnessGenes, and spent a couple of hours awed by my own capacities, before I realised how to interpret the information. Starting from the top: ACE is the endurance gene. You either have two copies of the long version, II; two copies of the short, DD; or one of each, ID. The long version is associated with endurance athletes, the short with being a power/strength athlete. I'm an II, so my endurance is epic.

I have these endurance genes in spades - in ACTN3, the gene for speed, I'm an RR, which is associated, in women, with higher-than-average baseline strength, and in older women, with better response to resistance training. (The letters are just the names of alleles - genetic-sequencing variations.) With the fat-burning gene, PPARA, I'm a GG, which is another endurance athlete's trait.