Perisher 2014 – Nordic Skiing – Learnings

by | Aug 23, 2014 | cross-country skiing, Perisher

We have been here for just on 9 weeks, skiing about 4 times a week on distances of about 7 to 12 km on each outing. Our time here has been well worthwhile and we have learned quite a lot. I thought I should record the main learnings (so we can retain them for next year). Much of this came from the hints given to us by Eduard Michel who skied with us on 6 Aug.
Two main learning:
1. Core. You mainly ski with your core. The arms do very little. Trunk posture is extremely important – shoulders down, string pulling up through the top of the head, tail tucked under. (Allowing the tail to point out is a fault that I have not been able to shake off and should have been eliminated on the beginners slopes.) The shoulder girdle is important and needs good stability. Strengthening the core with planks and crunches is an essential preparation. Hamstrings are as important as quads. Not much of the quads are used in classic skiing.
2. Feet. You need strong feet for most things (including classic skiing) and foot strength is usually overlooked. (Doing squats with heels on the ground and toes lifted does nothing for the feet and is an exercise not seen in normal life.) Good balance is essential and can be practiced by balancing on the balls of your feet. (We all loose the ability to balance as we age. We all have a preferred foot – usually the left foot if we are right handed. Balancing on the ball of preferred foot should be significantly easier than on the other foot. I’m doing 60 secs per foot twice a day.) I found that the toes on my right foot are extremely lazy. My right big toe did not engage. As a result, I could not get my left ski to slide. (The right foot pushes the left leg forward.) I think that gyms teaching heel-down squats and balance should be also teaching heel-up balance.

Shield Shrimp

When it rains across Australia’s vast inland region, temporary pools crop up all over the arid ground, giving life to a strange desert crustacean known as the shield shrimp (Triops australiensis).

Named after the formidable carapace that shields its head and upper body, T. australiensis can grow up to 7.6 cm long, and it uses its long, segmented tail and mass of 60 or so legs to propel itself through shallow water.

It also breathes through these legs – its sub-class Branchiopoda means ‘gill-legged’ – and in the females these legs bear ovisacs for carrying their tiny eggs.

Several pix in the Photo Gallery and a movie.

Acacia peuce

A rare and endangered plant. The tree grows up to 15 to 18 metres (49 to 59 ft) high, with short horizontal branches and pendulous branchlets covered in needle-like phyllodes adapted for the arid dry climate. It has a distinctive habit more similar to a sheoak or a conifer.

Although speculated to have been widespread across central Australia during wetter climates 400,000 years ago, the population is now mostly restricted to three sites, separated by the encroaching Simpson Desert. In the Northern Territory, the species is restricted to the Mac Clark (Acacia peuce) Conservation Reserve which is surrounded by a pastoral lease, Andado Station. The other two sites are near Boulia and Birdsville in Queensland. The tree is found in open arid plains that usually receive less than 150 millimetres (5.9 in) of rain per annum. They grow on shallow sand aprons overlaying gibber or clay slopes and plains and between longitudinal dunes or on alluvial flats between ephemeral watercourses.

 

Owen Springs Reserve on Hugh River

Owen Springs was a station on the Hugh River. The Hugh River flows into the Finke (when it actually flows). Both cut through the Western MacDonnell Ranges. The image above shows Owen Springs Reserve as a dot at lower right. The river it is next to is the Hugh. Hermannsburg, our next town, is near middle left edge. Hermannsburg is almost on the Finke River. You can see both Hugh and Finke Rivers cutting through sections of MacDonnell Ranges.

Palm Valley

Palm Valley is within the Finke Gorge National Park southwest of Alice Springs. Palm Valley has a smallish population of Red Cabbage Palms (Livistona mariae). The nearest related species is 850 kilometres away in Katherine NT. The average rainfall for Palm Valley is just 200 mm per year. Small pockets of semi-permanent spring-fed pools allow the unique flora and fauna (desert fish, shield shrimps tadpoles and frogs) to survive.

It had been assumed that the cabbage palms were remnants of a prehistoric time when the climate supported tropical rainforest in what is now the arid inland of Australia. Genetic analysis published in 2012 determined that Livistona mariae at Palm Valley is actually the same species as Livistona rigida from samples collected near Katherine and Mount Isa, both around 1,000 kilometres (620 mi) away. It is now thought that aboriginal people brought the palms to here from Mataranka.

Mound Springs

Mound Springs occur around the Western edge of the Great Artesian Basin and represent a natural discharge of Artesian water that was captured many hundreds of kilometers away from rain falling along the Great Dividing Range and New Guinea. This article provides details. Dalhousie is an excellent example of a mound spring.

Great Artesian Basin map Great Artesian Basin diagram