The countdown to Rio is now very much on. I'm currently five weeks in to the Olympic season and I'm already thinking constantly about bettering my London Bronze medal in the men's pair.

At the start of September, I won my third rowing world championships on the trot in Aiguebelette in France. After what felt like a very swift three weeks off, spent cramming in as many friends' weddings, cheeky pints, holidays with the missus as possible, I was back training full time in a boat before September was out.

When you have three weeks off after peaking for a World Championship, you feel amazing for a week and then your fitness drops dramatically. When you return to training you have to build yourself back up slowly and steadily paying close attention to your body. Injuries and illnesses are dangerously common so time that isn't spent collapsed in a pile on the sofa is spent stretching and kneeding sore muscles.

The Bishop's Nissan dealership in Guildford have been fantastically generous in giving me a quality motor to travel the 60 miles to training and back each day. My back is in no danger of seizing up after a few minutes blasting it with the heated seats.

It’s a bit of a shortened season this year with the Olympics scheduled at the beginning of August. For the rowers the first half of the year will all be about selection – getting your name on that plane ticket.

For me it’s about being ready from the off, there’s no room to put in a single slack performance in training. I'm being judged constantly against the twenty other guys on the national team on my physical performance in the gym and technical skill on the water. To make the Olympic team you have to be amongst the top fourteen guys in the best rowing nation in the world. Everyone on the team is a world medallist so there really isn't much room for error.

We had the first of four major trials at the end of October and then there will then be three more trials throughout the winter culmination in the big final trial at the end of March. That last result is going to play the most major part in securing a seat for Rio. There's a saying in rowing that 'you're only as good as your last race' so that last trial in March will be giving us all something to aim at through the winter.

You trial in a boat called a 'pair' with one other person. Your fate is therefore intrinsically linked with your 'pairs partner' so you have to make sure you are in the best shape you can be; not just for yourself but for your partner as well.

The Olympic Games are massive in rowing. Any rower will tell you that they will trade in any number of World Championship titles for just a single Olympic Gold medal. They come around every four years and by that time all the athletes are tuned up to an extremely high level. To win you have to perform near perfectly on finals day and even then you're not likely to win by more that a second over a six minute race.

The enormous weight of this great sporting occasion means there is no lack of motivation for me when I have to scrape the ice off my oar handle in the mornings and the rain and the sleet has gone through every outer layer of kit before the first lap of the lake is done. There is absolutely no doubt in my mind that I'm going out there no matter what and grinding it out. This thing comes around every four years and if you want to take your chance you have to go out there and train through whatever hell the British winter decides to unleash on you.

I came away with a bronze medal in London but if you're on the British team, you race to win an Olympic gold. So that’s what I focus on. Every. Damn. Day.

Bishops Nissan are proud to support George Nash on his road to the Rio 2016 Olympic Games. To find out more about Nissan’s partnership with Team GB, visit nissan.co.uk/uniteandexcite