NordicTrack was the first company to make ski machines, also called skiers or cross-country skiers. These machines can burn a few or a lot of calories depending on how fast you move your feet on the foot pedals and swing your arms.
Light Effort
Light effort is the level that it takes for you to do most daily activities such as shopping and laundry, according to the Centers for Disease Control and Prevention. You would be able to sing effortlessly while exercising at this intensity. A person exercising just above this level at a "fairly light" intensity would burn around 104 calories in 15 minutes on a NordicTrack skier, according to CalorieLab for a 150 lb. person. This would feel like an 11 on a scale of 1 to 20 with a being no effort at all.
Moderate Effort
Moderate effort causes your heart rate to increase and would prevent you from singing, but allow you to have a conversation. Exercising for 15 minutes on a NordicTrack skier at this intensity would consume 124 calories for a 150 lb. person. This would be a 13 on the 1 to 20 scale.
Vigorous Effort
During vigorous exercise, your breathing and heart rate go up. You could say a few words at a time but have to take a breath in between if you were exercising at this intensity. Expect to burn around 143 calories in 15 minutes on a skier at this intensity. This would be a 15 on a 1 to 20 scale.
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