Invictus Performance Nutrition

Welcome to Invictus Performance Nutrition

Founded in 2015 by Dr Rianne Costello, born out of a genuine curiosity to better understand the links between food and nutrition with human health and athletic performance

Since then, I've been fortunate enough to work with a wide array of different people all with different goals - from the recreational to the hardened athlete

I'm here to help you navigate the endless nutrition and fitness rabbit holes, decipher whether you can trust the influencers and scientists with agendas and ultimately, help you live your healthiest, happiest and fittest life.

Please read more about me, services available and do get in touch

Rianne

Testimonials

"Rianne’s skill is to apply her in-depth knowledge of the science of nutrition to the specific context in which one is hoping to improve performance, in my case, ultra-distance cycling. In the time we have been working together I have made a sustained improvement in performance through following Rianne’s guidance. The process has been something of a revelation."

Dominic Irvine, Sponsored Ultra Distance Cyclist, Record Holder and Author of “Ultra-Distance Cycling: An Expert Guide to Endurance Cycling.”

"I approached Rianne with a very specific goal in mind, to shed some weight without losing muscle in order to have a better chance of running my first marathon in under four hours. I've always been health conscious and had a varied and balanced diet, but struggled to lose the final few pounds that would give me muscle definition, regardless of how much exercised. It has been empowering to take control of my body with Rianne's help, I lost the weight, toned up and smashes my target, running London in 3hrs 46 minutes. I'm going to continue working with Rianne towards my next goal of getting fit to race bikes."

Matt Wicks, Marathon Runner

"I used to really struggle with getting my nutrition right when training and racing. I'd train hard, eat loads and my weight would still plummet. I'd never feel energised and was always hungry. Rianne has shown me the correct foods to be eating (not dieting!) and taught me how to determine my calories and carbs for racing. She has also identified missing nutrients from my diet. My energy levels are up, my weight is stable and training is going really well. I'm also properly fuelled for my Ironman racing and understand the importance of taking the time to plan not only my race nutrition but my training nutrition and recovery foods also. My performance has benefitted massively - it's a much more valuable investment than spending out on some lighter wheels or an aero helmet!"

Gemma Dobson, GB Age Group Triathlete

"Rianne has been an absolute revelation. At a time when I had a lot of questions about my diet, nutrition and fitness in general, Rianne helped me through and through. I was happy with my gym routine but due to the information over load, lost when it came to proper nutrition. She made it all so simple! From understanding my situation, to future goals and eating habits, Rianne worked with me at every step. She is detailed in her approach and puts in effort to every case. My customised nutrition plan is proof of that! Thanks to her, I know more about my body and what I need in order to achieve my goals. Rianne is extremely helpful and is always available for answers and motivation. I have already recommended her to my friends and will do so to anyone who is seeking professional advise on body fitness and nutrition"

Ali Abbas, Recreational Weight Lifting