They are different studies and that is what is asked for. Are you going to argue over what the definition of a separate study is now?
Read both studies and report back. 
Actually, please don’t bother. Not much to get out of this.
No I think I will, because with every response you change your goalposts.
The 2014 study is a 9 week trial of 18 athletes. The 2015 study is a meta-analysis of the wider topic.
The authors are the same but it is a different study. As an analogy, Oliver Twist and a Tale of Two Cities are not the same story because they were both written by Charles Dickens.
Like I said, read the studies:
Since nearly all studies dealing with TID were based on retrospective analysis, we recently employed a randomized controlled design to investigate which TID (HVLIT vs. THR vs. HIT vs. polarized) provided the greatest response on key components of endurance performance among well-trained athletes (Stöggl and Sperlich, 2014). We concluded that the polarized TID resulted in the greatest improvements in the majority of key endurance performance variables assessed, and THR or HVLIT did not lead to further improvements in performance. However, as numerous retrospective reports have shown conflicting results, the question regarding which TID represents the “best-practice” model for inducing performance gains—while avoiding overtraining—remains open to debate. Therefore, the aims of the present review were to: (1) summarize the main responses of different retrospective and prospective studies exploring TID; (2) provide a systematic overview of TIDs during preparation, pre-competition, and competition phases in different endurance disciplines and performance levels; (3) address whether one TID has demonstrated enhanced efficacy over another; and (4) highlight research gaps in an effort to direct future scientific studies.
No goalposts were changed and your analogy doesn’t check out. The LOTR trilogy would be a better fit.
So the fact they commented on a previous study they had undertaken in a meta-analysis of the wider topic makes this the same study?
Right. Is Return of the King the same story as the Fellowship of the Ring?
They follow their own study up because their results were not without doubt. In simpler words, they didn’t finish the job in the first run and hence went back.
LOTR is a better analogy because it’s a series of movies that tells one story from beginning to end. Just like the two studies do.
No, that’s not it. They ran a trial in the 2014 study then conducted a meta-analysis in the 2015 study. Two different things.
Why don’t you simply read their explanation? They specifically describe why they followed the 2014 study up in 2015. Literally in the next sentence they explain what they did.
Yeah you’re correct actually. It’s actually exactly the same study. Sorry.
Oh boy, I am out. In case you find actual new research on POL let us know.
ok.
Evertsen, F., Medbo, J. I., Jebens, E., and Nicolaysen, K. (1997). Hard training for 5 mo increases Na(+)-K+ pump concentration in skeletal muscle of cross-country skiers. Am. J. Physiol. 272, R1417–R1424.
Evertsen, F., Medbo, J. I., Jebens, E., and Gjovaag, T. F. (1999). Effect of training on the activity of five muscle enzymes studied on elite cross-country skiers. Acta Physiol. Scand. 167, 247–257. doi: 10.1046/j.1365-201x.1999.00607.x
Evertsen, F., Medbo, J. I., and Bonen, A. (2001). Effect of training intensity on muscle lactate transporters and lactate threshold of cross-country skiers. Acta Physiol. Scand. 173, 195–205. doi: 10.1046/j.1365-201X.2001.00871.x
Billat, V. L., Flechet, B., Petit, B., Muriaux, G., and Koralsztein, J. P. (1999). Interval training at VO2max: effects on aerobic performance and overtraining markers. Med. Sci. Sports Exerc. 31, 156–163. doi: 10.1097/00005768-199901000-00024
Ingham, S. A., Fudge, B. W., and Pringle, J. S. (2012). Training distribution, physiological profile, and performance for a male international 1500-m runner. Int. J. Sports Physiol. Perform. 7, 193–195.
Ingham, S. A., Carter, H., Whyte, G. P., and Doust, J. H. (2008). Physiological and performance effects of low- versus mixed-intensity rowing training. Med. Sci. Sports Exerc. 40, 579–584. doi: 10.1249/MSS.0b013e31815ecc6a
Yu, H., Chen, X., Zhu, W., and Cao, C. (2012). A quasi-experimental study of Chinese top-level speed skaters. training load: threshold versus polarized model. Int. J. Sports Physiol. Perform. 7, 103–112.
All but one are not on POL itself. That one I haven’t read yet. Though I suggest you read them.
Picked the first for you:
To study how training affects the Na(+)-K+ pump concentration, 11 male and 9 female elite junior cross-country skiers trained 12-15 h/wk at 60-70% (moderate-intensity group) or 80-90% (high-intensity group) of their maximal O2 uptake for 5 mo.
No need to change the goalposts again. You asked for new research and I have given it you.
The research you have posted is not pol related. Again no goalpost moved. Read up, it won’t harm!
Here is what the first study you brought up was about:
To study how training affects the Na(+)-K+ pump concentration, 11 male and 9 female elite junior cross-country skiers trained 12-15 h/wk at 60-70% (moderate-intensity group) or 80-90% (high-intensity group) of their maximal O2 uptake for 5 mo.
Really? So this study is not POL related:
Yu, H., Chen, X., Zhu, W., and Cao, C. (2012). A quasi-experimental study of Chinese top-level speed skaters. training load: threshold versus polarized model. Int. J. Sports Physiol. Perform. 7, 103–112.
Curious.
Read what I wrote „all but one“ and „that one I haven’t read yet“.
Your behavior gets rather obnoxious. I will ignore you from now on. Enjoy.
Let’s not get personal. Chris, I think you’ve said what you’ve wanted to say and I think Keoni has made his point too.
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