I am a 49 year old male (63 kg) and started recreational weekend mountain bike riding about a year and a half ago, essentially only riding up to 40 km once a week. Now that the bug has bitten, I have started structured training using TrainerRoad. After completing Sweet Spot Base Low Volume I & II, my W/kg has increased from 2.1 to 2.5 - a nice improvement, but not an impressive FTP at all. I am now busy with week 3 of Short Power Build Low Volume, feeling even stronger and looking forward to my next FTP test.
I would eventually like build up to participating (hopefully racing) in some MTB Cross Country Marathons. Cross Country marathons in my area are typically 60+ km with around 1500 to 2000m of climbing.
My question relates to training volume. While my current training volume seems adequate for shorter MTB rides/races, I am worried it may too low for longer Cross Country marathons.
Is my current Low Volume plan sufficient for Cross Country Marathon distances, or should I gradually start moving into a Mid or High volume plan as I get fitter? I am also considering starting to supplement my current Low Volume plan by adding a longer easy Sunday MTB ride of 3 to 4 hours.
Any thoughts and comments will be much appreciated.