Burnt out last night - did I over train?

Been riding since last summer so I guess most folks on here would class me as a beginner. I'm 39 and in reasonable shape, though for a cyclist I guess I'm pretty big at 6'2" and 220lbs, I'm aware this has no effect on my indoor training unless I choose to race.
Over the last 2 months I've steadily ramped up my training. I like to limit my sessions to between 50 and 60 minutes but I've gradually added in more days each week until just recently I managed to train 8 days in a row where my previous best had been 4 in a row.
At the start of last week I began Zwift's TT tune up plan, shortened to 5 weeks long and for that first 5 sessions the plan was a piece of cake, bordering on too easy if I'm honest.
The second week the plan has ramped up what seems like a huge amount with last night Cruise Intervals #2 absolutely killing me - I only managed two thirds of the workout before having to quit.
Last nights crappy session was the first real downer I have had after feeling like I was gradually improving for months now and it came after my first rest day in 8 days, which has puzzled me.
My legs felt great all day yesterday with the rest but when I started cycling (albeit a touch later than usual at 8.30pm) I knew for whatever reason I just didn't have 'it'.
My sleep and nutrition has been steady. I know it sounds insane but it's almost like that rest day actually set me back somehow.
I guess my question for everyone is, 'have I over trained and need more rest or should I soldier through and jump back on the bike tonight?'.
Over the last 2 months I've steadily ramped up my training. I like to limit my sessions to between 50 and 60 minutes but I've gradually added in more days each week until just recently I managed to train 8 days in a row where my previous best had been 4 in a row.
At the start of last week I began Zwift's TT tune up plan, shortened to 5 weeks long and for that first 5 sessions the plan was a piece of cake, bordering on too easy if I'm honest.
The second week the plan has ramped up what seems like a huge amount with last night Cruise Intervals #2 absolutely killing me - I only managed two thirds of the workout before having to quit.
Last nights crappy session was the first real downer I have had after feeling like I was gradually improving for months now and it came after my first rest day in 8 days, which has puzzled me.
My legs felt great all day yesterday with the rest but when I started cycling (albeit a touch later than usual at 8.30pm) I knew for whatever reason I just didn't have 'it'.
My sleep and nutrition has been steady. I know it sounds insane but it's almost like that rest day actually set me back somehow.
I guess my question for everyone is, 'have I over trained and need more rest or should I soldier through and jump back on the bike tonight?'.
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Remember one vital thing - training doesn't make you fitter, recovering makes you fitter.
Training puts a load on your body and your body will adapt to that load during recovery - but you need to give it time to recover.
Also, overtraining isn't something you can do in 8 days. Overtraining is a pretty serious, long term condition from continual non-functional overreaching.
Functional overreaching - doing training, getting tired, recovering and adapting
Non-functional overreaching - doing too much training, not enough recovery so your body never quite adapts, just gets beaten down
Overtraining - Continual state of non-functional overreaching for extended period of time, can take years to come back from.
"Recovery" is a funny thing, often you feel worse before you feel better. Constant stress and trianing keeps your body in a "primed state" where it releases natural "pain killer" hormones. when you ease up the level of these hormones drops and your body starts adapting to the stress. During this time you become a lot more sensitve to the effort level, it feels harder as your body isn't primed for it. It's why getting a taper right is such a balancing act, you want your body to have adapted to all the training, but you ALSO want the body to be primed for the event/effort.
Yeah, 8 days in a row then a scheduled rest day THEN I felt worse training the next day.
I felt fine while doing the 8 days in a row, otherwise I wouldn't have done it. I only stopped for the rest day because towards the end of the previous training session I felt like I was beginning to push things a wee bit tooo much.
Looking at what you have said, I'd say I have slipped (barely) into the non functional overreaching category.
Perhaps I'll take another rest day today after all.
Also if you look at the pros in long stage races, they always do a ride on the rest days.
This is what it looks like when you track these over time:
Here is some info about the internal:external load ratio ==> viewtopic.php?f=40121&t=13100387
It will retrospectively look at your riding data, ideally with a heart rate monitor and a power meter. You can now adjust data like weight, FTP, LTHR for date bands (Strava's own Fitness and Freshness can only use your current weight, FTP etc. to look at previous rides IIRC, which can be incorrect by some margin over a long period of time).
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo
I decided to take another rest day yesterday but I'll be back on the bike today!
You dont need to do as much as you think. Don't be so obsessive. It's a hobby, you're supposed to do it because you want to, not because youve slipped in to feeling obliged without realising it.