Update on my 800m training – Feb-Mar 2022

To recap: since my last 800m time trial I’ve spent the winter following the traditional offseason regime of an 800m runner. Building the endurance base while slotting in some fast parkruns to try and build leg strength / speed replicating cross-country racing.

After a couple of months my parkrun time began to drop but it was also clear my top-end speed was limited. This was never a problem for me when I was younger because I used to throw myself into every run, play sports with lots of sprints / jumps and do circuit training. But my thighs have lost 3-4 inches over the past few years by focusing on endurance over speed and I lost over a stone during 2021 (188lbs down to 174lbs).


By end of January, I’d improved my speed for a kilometre interval to 3:42 and moved back towards endurance work in preparation for the Bournemouth Bay Half marathon which takes place this Sunday. The plan was as follows:

  • Monday – 30-min recovery run fasted straight out of bed followed by ten minutes of form drills.
  • Tuesday – session to work on half marathon pace (aiming for 6:45-50/mile).
  • Wednesday – 40-min recovery run plus ten minutes of form drills.
  • Thursday – 1hr easy run around Poole Park – mostly flat.
  • Friday – an hour Steady run around the area – 7+ to 9 miles.
  • Saturday – easy parkrun. As I no longer wanted to work on speed, I only planned to do one all-out parkrun about midway through these last eight weeks just to keep it ticking over.
  • Sunday – while in an ideal world I would have lengthened my standard 11.7 mile long run out past the half marathon distance, I made a choice not to. I’m interested to see whether the last mile or so of the half is a debacle or whether the rest of the training sees me through.

Tuesday

I began February with a couple of 10K-paced interval sessions of 6x1K with 200m jog recovery. These were a follow on from the 5x1K with standing recovery I’d done throughout December and January. By using a shorter jogging recovery, I’d begin to improve the aerobic functioning of the muscle fibres.

 Effort 12 (uphill)34 (uphill)54 (uphill)
1-Feb4:014:124:094:164:174:23
8-Feb3:584:043:584:104:044:10
6x1K with 200m jog recovery intervals

My notes show the first session was “trying to fit in one session too many over the past five days” and when you compare the second week’s numbers there’s a clear improvement.

I’d like to have repeated this session for a few more weeks but I needed to move onto working at half-marathon pace where the aim was to do much longer intervals at a slower pace (4:12 – 4:15 per km or 6:45 – 50 per mile). The jog recoveries were a quarter of the distance covered.

 Effort 123456TotalPace
15-Feb6x1mile6:496:526:526:546:457:0241:146:53
22-Feb4×1½ mile10:0210:0910:0110:1140:236:44
1-Mar3×2 mile13:1613:1913:2840:036:41
8-Mar2×3 mile19:4220:2440:066:40
15-Mar3×2 mile12:5413:0413:1239:126:32
22-Mar4×1½ mile9:559:599:569:5839:486:38

While the first week was tough and I barely got on pace for the efforts, the following weeks saw a phenomenal improvement as the distance lengthened out and the body adapted. A couple of the sessions were run on windier days 7-15mph and, while the course I use was relatively flat and on a figure of 8 loop – running into the wind was sapping.

The standout sessions were the 4th and 5th weeks where the 3-mile efforts were worth 20-21 minute parkruns (back-to-back); and then the following week on the shorter three 2-mile efforts the pace came in at 6:27, 32, 37 avg. The final week was slightly disappointing as I didn’t get close to matching it but I think my legs were struggling after an amazing Steady run on the previous Friday.

Friday

With the 7½ mile Steady run I’d been doing through January now taking 53-55 minutes, I decided to go back to an old 9-mile route from home along Gravel Hill and through Canford Heath that would be more challenging due to a long uphill on miles seven and eight.

Run TimePace per mileFastest mile
11-Feb1:05:547:176:57
18-Feb53:23*7:106:43
25-Feb1:03:387:086:39
4-MarNo steady run  
11-Mar1:04:437:136:40
18-Mar1:02:367:016:35

Notes: 18-Feb run round the shorter 7½ mile route due to Storm Eunice with its 30mph winds that day. The run itself was never too bad. No steady run on 4-Mar as fast parkrun the next day.

The last time I ran this route in April 2020, I set a course record of 1hr08+ so the first run at 1hr06 was a significant improvement. To be running 7min/mile pace by the end of the training block is testament to how this run combined with the Tuesday Threshold session has made a significant improvement to my endurance and stamina.

Saturday

The only fast parkrun came in at 20:48 at Upton House. It was an extremely windy day and my legs were still fatigued from the Tuesday session. So it was only a small five second PB but I’m sure at Poole with fresh legs I’d happily be sub-20.

Sunday

The long run has continued to be early on a Sunday morning usually at 6am and always fasted, straight out of bed.

Having set a course PB on 28-January I was stunned by how badly the following week went. My legs were absolutely gone and barely had any pace. I think it was down to the change in training phase but gradually as the weeks went by the speed quickened up on these despite doing a challenging Friday session each week.

 Run timePace per mileAvg HR
30-Jan1:28:287:35147
6-Feb1:42:098:43139
13-Feb1:39:308:29135
20-Feb1:37:238:20138
27-Feb1:33:077:57144
6-Mar (parkrun on Sat)1:34:158:04137
13-Mar1:32:177:52144
20-Mar1:31:557:51136
27-Mar (10-mile on flat)1:15:327:28

I finished off the training block with a 10-mile run last Sunday up on the flat past Bournemouth Uni, through Winton and back through Kinson. At 7:28/mile it was the fastest Sunday long run I’ve ever done and a real confidence booster ahead of the half marathon.

Mileage

The weekly mileages during this period have been 47, 51, 52, 50, 52, 51, 50, 47 miles for a total of 400 miles in two months. This has been by running every day of the week and accumulating 6 – 6½ hours training time each week. More often the weekly structure has seen Tuesday totalling 10-miles, Friday 9-miles and Sunday almost 12-miles for 60% of the weekly mileage.

Half marathon on April 3rd

I was really pleased with this block of training as preparation for the half marathon – I think there’s a high probability of breaking my 1hr31 PB if conditions are good. I’m hoping to break the 1hr30 but the legs have felt fatigued and I left my taper late.

Even so, the whole point of the past six months was to build a bigger endurance base during the winter ready for another round of 800m training and I’ve certainly done that. I think I’m at the fittest I’ve ever been, it’s just a case now of proving this with race times.

With this improved aerobic base, I’m hopeful I can now begin to push the speedwork harder. I’d shied away from running efforts too fast previously as that usually undoes my training, resetting my fast-twitch muscle to anaerobic and precipitating an aerobic rebuild.

I’m not quite sure how I will train in April. I need to give myself at least a week of recovery running after the half marathon and I’d like to see where my parkrun time is at. After that, I’m intending to resume 800m training and while I may use JackD’s sessions as the basis of my training, I’m going to tweak them to try and help improve my top-end speed. Building leg speed is becoming a priority and I may even start doing some hill sprints – I’m just nervous about that because when I did them two years ago, everything went backwards!

Anyway, let’s see how the half marathon goes and leave the future until after that.

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