Following a study of three categories of runner : Englishmen, Frenchmen and Leaders
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Following a study of three categories of runner:
Englishmen: classified outside the top 100
Frenchmen: classified outside the top 100
Leaders: runners of all nationalities classified among the top 30
The average rucksack weight found is:
for Englishmen: 11.300 kg for 19,200 calories, i.e. 5.200 kg of food
for Frenchmen: 8.700 kg for 16,800 calories, i.e. 4.600 kg of food
for Leaders: 7.200 kg for 16,000 calories, i.e. 4.700 kg of food
If we compare the weight of food for Frenchmen and Leaders, we find that there is not much difference, and indeed often less food weight carried by Frenchmen, for more calories. This contradiction springs from the participants’ eating habits.
The difference in food weight between Frenchmen and Englishmen is just 600 g for 2,400 additional calories. This gives a weight of 4,200 kg for 16,800 K/cal.
Englishmen thus appear to find energy products with more calories. They might gain some weight in this area as they rarely repackage their food, keeping the original packaging: a gain of around 200 g.
Frenchmen could ideally decrease the weight of their food by 400 g.
Englishmen nevertheless appear to carry too much food – some have 25,000 calories whereas 20,000 would be largely sufficient.
Frenchmen carry more equipment weight than Leaders, but less than Englishmen.
We can note a difference of between 1.600 kg and 3.600 kg with regard to the equipment itself.
'Comfort' equipment is thus an area to work upon to decrease weight carried: change of clothes, mattress, stove, camera, MP3, book, etc.
- too many clothes: FAVOUR LIGHT FABRICS WHICH PROVIDE INSULATION.
- rucksack too big and thus heavier: A VOLUME OF 20 L IS SUFFICIENT
- duvet too heavy: IDEALLY SHOULD BE BETWEEN 500 G AND 1 KG
- cooking materiel, mattress, etc.: NO CUP, POLYCARBONATE SPOON/FORK, READYMEAL, HALF MATRESS, ETC.
- large wash bags and towels: IDEAL –PIECE OF SOAP, MINI TOWEL, MINI TOOTH BRUSH, TOOTHPASTE SAMPLE, EVEN A DISPOSABLE RAZOR
The leaders will only have one change of underwear in insulating, high-performing and lightweight material which they keep for the bivouac (pants or 2nd pair of shorts, 1 shirt and 1 pair of socks). They wash or rinse their running clothes to get rid of salt; to do this, they must, however, arrive early – also possible to dry during the night... For the evening, they have a sweatshirt or long sleeved shirt and a Tyvek suit.
Note: your cardiac rhythm increases by 20% when you run with a rucksack weighing the equivalent of 10% of your bodyweight. Support changes and the body has a tendency to lean forward. Your feet "slide" towards the end of your shoes. Rubbing increases, heightening the risk of injury to the lower back and shoulders.
It is thus self evident that the heavier your bag, the greater the risk of being hampered by various injuries, in particular blisters. It is thus important to pay particular attention to the weight of each object amongst your equipment.
Your rucksack should not, therefore, exceed a weight of 9 kg for 17,500 Kcal, i.e. 4.800 kg of food and 4.200 kg in equipment weight.I
Ideally you should aim to get close to 8 kg for 17,000 Kcal, i.e. 4.400 kg of food and 3.600 kg in equipment weight.
This looks feasible based on the findings for Frenchmen, but drawing on Englishmen for the weight/Kcal ratio and Leaders for the equipment weight...
Easy!!! Start eliminating those excess grams!
Calculators at the ready!
Note: Some brands of rucksack declare that their bag is suitable or even recommended for the MDS. This is not true, as these bags can hamper the correct positioning of the runner number. It is important to check that the straps and/or the ventral pack are compatible with this specific rule