Don’t go faster than you should just because you’re feeling good!
Looking for a workout you can perform year-round regardless of what race you’re getting ready for? Then look no further than the halftime fartlek. This structured session can be performed by runners of all ability levels, is easily amendable and can be as challenging as you want to make it.
I like to use this session with athletes I coach who are returning to serious training after some time off, others who are peaking for a key race, and some who might just be burned out from doing too much track work. The basic framework of the workout is the same in each case, but the duration of the intervals and their accompanying effort level gets adjusted accordingly.
So how does it work? In it’s most basic form, the halftime fartlek is a set of descending intervals of a pre-determined length at a given effort level. The recovery between intervals is half the time of the last one you completed, hence the name of the workout.
Say you’re just getting back into serious training after a few weeks of well-deserved downtime following a big race. You can set up the halftime fartlek as such:
* 10-15:00 warmup, then run 5-4-3-2-1 minutes at 10K effort, followed by a 10-15:00 cooldown. Take 2:30 recovery after the 5:00 interval, 2:00 after the 4:00 interval, and so forth.
Or, you could shorten the length of the intervals and perform multiple sets, such as:
*10-15:00 warmup, 3-5 x [2:00-1:00-30 sec @ 5K effort], 10-15:00 cooldown. Again, recovery is half the time of the preceding interval. Take 2-3 minutes in between sets.
On the opposite end of the spectrum, if you’re approaching a big race and want to keep your legs moving in the final days leading up to it, perform the halftime fartlek 3-4 days beforehand. Adjust the length of the interval and effort level based on the distance you’ll be racing.
For example, heading into a shorter race such as 5K, I’d suggest the following variation of the halftime fartlek:
* 10-15:00 warmup, 4-3-2-1 minute pickups at no faster than 5K race effort, followed by a shorter set of 2:00-1:00-30 sec pickups slightly faster than race effort, all with halftime recovery. Take 2-3 minutes between sets. Finish with a 10-15:00 cooldown.
That’s 16 minutes worth of broken-up running at race pace 3-4 days before the big day. It’s enough to keep your neuromuscular system firing without wiping you out before the starter’s gun goes off. Of course, it’s up to you to keep yourself under control during the workout and not go faster than you should just because you’re feeling good.
For a 10K, simply bump up the duration of the intervals and back off the intensity a little bit. For example:
* 10-15:00 warmup, 6-4-2 minutes @ 10K race effort, then 3-2-1 minutes slightly faster than race effort, all with halftime recovery. Take 2-3 minutes between sets and finish with a 10-15:00 cooldown.
If approaching longer distances such as the half marathon or marathon, try the following version of the halftime fartlek four days before your race:
* 10:00 warmup, 8:00-6:00-4:00-2:00 all at goal race pace with halftime recovery between intervals, 10:00 cooldown.
Lastly, when in the middle of a training block, use the halftime fartlek to replace a descending ladder workout on the track. Instead of running around in circles to do an interval set of 1,600m, 1,200m, 800m, 400m, 200m at a few seconds per mile faster than your 5K race pace, head off the track and do the following (n.b. base the duration of the intervals on roughly the amount of time you’d anticipate taking to cover the equivalent distance on the track):
* 15:00 warmup, 7:00-5:00-3:00-1:00-30 seconds, starting at 5K effort and getting faster with each rep, 15:00 cooldown
Don’t worry about covering a set distance in a certain amount of time. When the watch says to stop, you stop. Pressure’s off. That’s the beauty of the halftime fartlek.