-90 seconds then increase the next interval to two minutes. Repeat this pattern up to a five-minute interval, make the next interval four minutes and continue down the pyramid for a 1/2/3/4/5/4/3/2/1 pattern. Finish with 10-minutes of steady running at 40

10-15 miles beforehand. Then at least you'll be doing the 'last' 6 miles of your training run with the crowds, which will keep you going. If you decide to do the extra miles after the 10K race, make sure you run much slower than your 10K race pace

I've ticked most of the 'must-do' boxes in my 20 years of running, from 5Ks to marathons, a multi-day event and even a night run. But I've never raced a mile, attempted cross-country or donned fancy dress. Nor have I run a European city marathon

WEEK 4 Rest 4M inc 200m at mile pace, then 200m jog; then 1000m at mile pace; then 400m jog; then 400m at faster than mile pace Rest 3M inc 6 x 100m strides, 1 at 10K pace, 1 at 5K pace, 1 at 3K pace, 1 at mile pace, 1 at 800m pace, 1 at 400m pace Rest 25

at marathon pace, 1M at 10K pace. Total time should be 4-5 mins longer than target race time.Key session for half-marathon races: 13 miles with 2M at marathon pace, 3M at half-marathon pace, 1M at marathon pace, 1M at 10M pace, 1M at marathon pace, 2M at half

-minute runs followed by three-minute recoveries.Pace B is your 5K pace, about three seconds a lap (10-15 seconds a mile) faster than Pace A. Recovery time should equal running time.Pace C is your mile or 1500m pace, about three seconds a lap faster than Pace B

Mon 3MTue 4M, then 6 x 100m at 1-mile pace Wed 3M or RestThu 2 x 1000m at 5-mile pace, then 2 x 800m at new 5K pace, then 2 x 400m at 1-mile pace (1:18/1:37/1:55)Fri Rest Sat 10-11M, then 6 x 50m (fast but relaxed)Sun RestWEEK SIX Mon 4MTue 1 x 1600m

then 10 mins easy jog; then 6 x 200m with recoveries of 30, 25, 20, 15 and 10 seconds. 30-40 mins slow 1200m time trial; then 10 mins jog; then 4 x 400m with 2-min recoveries with 200m at 3K pace, 200m at 800m pace Rest or 30 mins slow 2 x 2K at 5K pace

in a speed session-104-180Easy - a gentle jog-138-148Slow - conversational pace -146-156Steady - a comfortable, but purposeful, pace. -158-168Brisk (or Threshold (THR)) - around your target pace-174-182 Fast-10K-180-188Fast-5K-186-194Fast

:48 6:28 4:42 2:53 8145 (1:48) 1:34 3:26 5:24 7:16 5:18 3:16 1:3250 (2:00) 1:45 3:49 6:00 8:04 5:54 3:39 1:4355 (2:12) 1:56 4:12 6:36 8:52 6:30 4:02 1:5460 (2:24) 2:07 4:35 7:12 9:40 7:06 4:25 2:0565 (2:36) 2:18 4:47 7:48 10:28 7:42 4:37 2:16You should