Thanks to everyone for all of the great advice. I am going to work it into my training plan and see what I can do. Since getting hurt and deciding to give up on marathoning, I have been doing 35-40 mi/week with one mid-week quality/speed workout and a weekend long run of 10-13. I try to squeeze in some tempo miles, but hard to do that third tough workout a week without getting hurt (at least for me). That has me at 5:05 mile and sub 18 5k at age 45.
My mid-week speed workout is typically a long interval - e.g. 4X1200 @ 5K pace (5:40-45). For the mile, I think I will start to phase in more mile pace Repetition workouts. I can currently get through (barely) an 8 X 400R @ 75 pace, but only do on rare occasions. I need to do more of those types of workouts. I will hope to be able to get up to 10 X 400 and/or do them faster over time. Another thing I will do is to add more sprints. I currently never do striders. I will try to add those plus some 100m and 200m repeats/drills to get the turnover going. I will also look to benchmark myself every 3-4 weeks or so with a 1200 TT at <3:45. That was good advice. I could maybe do that on a Sat on weeks where I do a 10 mi LR on Sunday since those are pretty easy for me after doing all of those 20+ mi LR's when I was getting up to marathons.
I also will continue to work on strength training. After hurting my back and doing PT, I was re-introduced to the value of having a strong core.
So, my lessons learned from your advice as a masters miler going for a sub 5 minute masters-PB are:
- Do mile pace rep workouts: 8-10 X 400 as staple; 3-4 X 800 as alternative
- Add sprint drills - striders at end of run; 100/200m repeats
- Do 1200m TT to benchmark myself every 3-4 weeks. <3:45 goal without going all out.
- Do a tempo (3-4 mi at 6:15pace or so for me) run when I can without getting hurt
- Keep up strength training: core, legs, arms/shoulders
- 10-13 LR is adequate for mile to 5K training at my level (but I will suffer on the longer races)
- Recovery pace on other days. Swap in a spin session if joints are bad. 35-40 mi/wk probably ok at my level for mile/5K training, but continue to expect weak races at 10K and up. Some people get great mile results on 20-35 mi/week.
- If I am feeling close to injury, can scale back the number of reps on speed workouts (I saw some success with many fewer reps in some of the posts, so maybe 8-10 X 400R not entirely necessary? 4-6 X 400 ok? Maintenance or improvement?)
If I missed anything major, please comment. You guys who are just over 4 min in the mile as a master are really awesome. There are some fast guys in the NYC area that I get to see, but they are in the 4:20-30 range. That is still unbelievable to me. Keep it up! Thanks