I can only find the abstract, unfortunately I dont have subscriptions to any sports journals. I am just wondering if this study equated TUT and Intensity between the groups.
The effects of eccentric and concentric t... [Eur J Appl Physiol. 2003] - PubMed - NCBI
I couldnt understand all the numbers but did a search on it and basically they got 4 groups, 2 doing negatives and 2 doing positives, half doing explosive style(plyometrics) lifting and the other half seems to be regular rep speed.
I am guessing the load was <60%RM and the TUT was very different between the groups, but if it was a quality study things would of been equated and I would be very surprised at the results.