Differences between 1 : 1 and 1 : 2 ratio of interval training:
1 : 1 means load and the rest is equal. For example one minute exercise followed by one minute of rest similarly.
1 : 2 means that the period of rest is double of the load given. For example 2 minutes exercise followed by 4 minutes of rest.
When the training in intensive 1 : 1 ratio of load is followed and when the training is extensive interval training the method used is 1 : 2.
Most of the sames and sports are based on the principle load and rest again load and rest. The rest period during training work load should not exceed five minutes.
Another example can he of a sprinter:
100 m sprint 100 m walk 1 : 1
100 m sprint 200 m walk 1 : 2