Why is my Block Time shorter than the chosen Block Length (25/35/50 minutes)?

The training protocol is based on training volume and not time. Therefore, the time to complete a block will vary amongst individuals. The Block Length alternatives (25, 35 and 50 minutes) are estimates to provide an indication of how much time it will take to complete a block. These estimates are based on historical data for users that are a bit slower than the average. This approach was chosen to ensure that users have the necessary time available to complete the block.