From Nordic Walking USA

Keep Fit the Nordic Way
Nordic Walking is regular walking made up to 40% more effective by the use of specifically designed hand-held Nordic Walker® poles. With the correct Nordic Walker® technique, you can...
Burns up to 40% more calories than regular walking!
Strengthen your upper body!
Reduce the stress on the joints!
Basic Technique
Keep the poles close to the body. The stride begins as the heel touches the ground and ends when the toe together with the ball of the foot pushes itself off the ground. The pelvis lifts up high and the general posture is taut and forward leaning. The upper and lower torso are involved in a clearly defined counter-swinging motion during which the mid-torso muscle groups are actively worked. Opposite arms and legs swing alternately forwards and back.
Walking with a good technique means that the stride begins as the heel touches the ground and ends when the toe together with the ball of the foot pushes itself off the ground

Swedes are always interested in physical fitness and this is a great way to get some exercise and stay balanced and not turn an ankle.
The following origin is from Wikipedia---
Nordic walking is defined as fitness walking with specially designed poles. It evolved from an off-season ski-training activity known as ski walking, hill bounding or ski striding to become a way of exercising year-round. Ski walking and hill bounding with poles has been practiced for decades as dry land training for competitive Nordic skiers. Ski coaches saw the success of world class cross country skiers who used ski poles in the summer for ski walking and hill bounding and it became a staple of off-season Nordic ski training. Hikers with knee pain discovered they could walk more powerfully with a pair of trekking poles, often eliminate or reduce hip, knee foot pain, and backpackers found relief from painful backs when using poles.
In 1997, a Finnish ski pole manufacturer Exel, introduced the trademarked Nordic Walker® poles, equipped with special Nordic walking straps, and "Nordic walking" became the accepted generic term for fitness walking with specially designed poles. The Nordic skiing savvy Northern Europeans quickly embraced this dry land hybrid of two of their favorite fitness activities -- Nordic skiing and walking, and in a little more than a decade after its introduction in Europe, an estimated 10 million people around the globe have taken up fitness walking with specially designed poles as a regular form of exercise.
The technique is a simple enhancement of normal arm swing when walking. The poles remain behind and pointing diagonally backwards at all times.
• Shoulders are relaxed and down.
• Poles are held close to the body.
• The hands are opened slightly to allow the poles to swing forward - the poles are not gripped but swing from the wrist straps.
• The leading foot strikes the ground.
• The opposite arm swings forward to waist height.
• The opposite pole strikes the ground level with the heel of the opposite foot.
• The poles remain pointing diagonally backwards, they are never in front of the body.
• Push the pole as far back as possible, the arm straightening to form a continuous line with the fully extended arm, the hand opening off the grip by the end of the arm swing.
• The foot rolls through the step to push off with the toe. This lengthens the stride behind the body, getting the most out of each stride.
• The arm motion is loose and relaxed.
Keeping the arms relaxed and keeping the poles behind the body are key elements in the proper technique. I found that my previous experience with poles used the wrong techniques, planting the poles in front of the body and bending the elbow too much.