To just complete the MDS training can be minimal, but, and it is a big BUT, to enjoy the race, do well and achieve your best possible position correct training is essential.
If you are an 8 stone Moroccan then yes, your minimal 2100 cal daily specified amount will be fine. If you’re a typical 10 stone plus European it will most definitely not.
Without the correct kit any training, nutrition or preparation of any is totally wasted.
The most important factor is the ability to adapt to your surroundings.
“It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change.In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment”