Attempted Fartleks for the first time today. I was surprised how challenging I found it to switch the pace, considering I managed fine with intervals a few days ago. I tried to judge the pace change by effort ( as per the audio guide), but felt so tired with 2 repetitions to go, even though I slowed the “recovery” parts to what felt like snail pace towards the end. I definitely prefer intervals!
I did a 2k warm up run at 30s per km faster than my usual pace before starting the Fartleks 28m session so I was probably expecting too much of myself!