Try going through the first weeks of the c25k podcasts using the running bits as fast and the walking bits as slower running. Week 1 has 8 intervals of 1 minute, week 2 ups them to 90 seconds (but only 6 of them). They are a bit longer than Speed anyway and have a nice structure.
I do the HIT running - I don't use a podcast, but it's easy to do without it.
Warm up walk
Light jog for 5 mins
Then 5 repeats of:
30 sec running
20 sec faster running (probably about Tempo pace)
10 sec flat out
After every 5 repeats you should do a 2 min walk.
3-5 repeats & you'll be well spent.
I don't even always bother using a watch, just count & guess. It died too gave to be exact! I Keep count using the Middle Eastern finger counting method. (Use thumb to touch 1st section of forefinger for 1st interval, touch the middle section for 2nd, 3rd section, & then unto middle finger for 4th & 5th intervals. (If you want to keep track of the sets, use the other hand!)
I just use my own fast music, or sometimes don't even bother with music.
I'm another fan of audiofuel. I tried the very short and cheap interval one that was about 20 minutes but it didn't stretch me enough. After that i bought no 2 of a woman runner's 3 interval training tracks. I've only used it once but it pushed me hard and i ended up walking a bit. That's great because it gives me a goal to aim for next time.
With audiofuel's help I've increased my speed on race days. My first 10k race on 4th March i did 1 hour 18 seconds (previous training time was 1 hour 6 mins +). Last Sunday's 5k race in Surrey I managed in 28 mins 30. I did both those races counting furiously! (I don't use music on race days!)
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