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Fatigue: better to shorten interval or slow pace?

The volume has caught up with my legs.  Just this morning, I thought I was hammering a z5 on the bike only to look down at the Joule and see barely a z3!  Same with running.  Question is:  on interval sets (biking or running) should I

A) Focus on holding the prescribed zone at all cost, and decrease the time of the interval (maybe by 25-30%)

-or-

B) Drop down to one zone slower, but keep the interval time as prescribed in the workout

IOW, on interval sets (5 wks til race) what's more important:  intensity or duration?

Comments

  • What's most important is recovery. If your data says you're clearly fatigued, step down the intensity and let your muscles rebuild. To do otherwise is to dig the hole deeper. With 5 weeks left its a perfect time to chill for a couple of days, leaving enough time for another short build (with volume) and then taper.
  • Freshen up; hit the key workouts well and create success.
  • Posted By Mac Caudill on 26 Jul 2011 02:11 PM

    ...IOW, on interval sets (5 wks til race) what's more important:  intensity or duration?



    I agree with the others, you need rest/recovery more than a half-assed workout at this point. If it were me, I would skip this week's run and bike intervals, and maybe the sprint session of swimming, I'd make sure I got in the Thursday long run and the Saturday brick. everything else would be secondary until I felt ready to go. Usually it takes me 36-48 hour of backing off (like, one day totally off) to get back in rhythm at this stage of an IM build. And I would make doubly sure I had enough fuel on board as well as fluids before, during and after any workout.

  • Timely question for us preparing for IMC and IMLou. And I just thought my run shoes had gotten heavy and my SRM was out of calibration ! Seriously, my RPE power numbers vs actual watts are 10+% off. Sounds like I'm in same boat.
  • P did a post about this last year, I believe he was talking about the temperature, but it applied to other situations as well.

    You can break a 2 x 1 (running) to a 4 x .5 etc. and/or increase the RI. Same for the bike change a 2 x 15 to a 3 x 10 etc.
  •  @Cary - thanks for that tip, I'll look for that post...but that makes sense.

    I've taken about 4 full days off the past 2 weeks, thinking that would do the trick.  Legs just feel like lead despite the extra rest.  Coach Patrick really wants me to do the run test this Thursday.  Unless there's a miracle happening that I don't know about, I think I'm gonna bomb it.

  • @Mac - it was the July 07 2010 Podcast, here's the direct download

  • I would do one of three things, depending on what I felt was the source of the power outage (fatigue, motivation, heat, etc), my relative strengths across the sports, and downstream workouts and their priority:

    • Hold the prescribed power for a decreased interval length, or...
    • Dial in 75-85% and call it race specific/one gear up aerobar time, or...
    • Take the day off
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