Isotension is the contraction of muscles without using weights

[Dees 1984]

What is isotension? Isotension is the contraction of muscles without using weights. You just pose and flex your muscles hard. NO2 BURST For example, if you flex your abs hard and hold it in the flexed position, you are performing isotension exercise.The best time to perform isotension exercises is during your workout sessions. When combined with high-intensity weight training, the results you get from isotension training can be astounding.http://www.healthsupreviews.com/no2-burst/