I am new to running. So I have started from a humble 5 minutes of proper jogging everyday in the evening. I have decided to increase my endurance by increasing 30 seconds every weekend so that I could run for 31 minutes after 1 year from the date I started runnning. My question is, should I decrease the increments or increase them or are they normal. Also, at how many minutes mark should I stop incrementing any further. Thanks in advance!