I am doing my first ever half marathon in September and will be started serious training this weekend hopefully getting in 4-5 runs a week including intervals, fartlek and long runs. I am a 25 year old man and had a pretty unhealthy lifestyle in the last 7-8 years and looking for a change, in general I am quite active. I am using the sub 1:30 training plan on the website however I am a litte confused about something if people can help. The speedwork sessions are confusing me for example:
Tue Speedwork 6 x 800m, 100m jog (7M total) 5K 60 mins 8/10
6 x 800m = 3 miles... the says 100m, is that a 100m sprint or jog and do I do it straight after my 800m? Also all in all that only equals 4 miles, where do I get the other 3 miles from?
Another example: 8 x 500m, 200m jog (7M total) is not 7 miles in total.
Another thing is what is THR, one sessions says:
Thu Threshold 7M (inc 4M THR) 1/2M 50 mins (27 mins THR) 8/10
7 miles incluidng 4 miles THR - what is this please?