4 years ago

Effects of Varying the Step Duration on the Determination of Lactate Thresholds in Elite Rowers.

Sarah M Woolford, Pitre C Bourdon, Jonathan D Buckley
This study aimed to identify the minimum increment duration required to accurately assess two distinct lactate thresholds. Twenty-one elite rowers (12 female, 9 males) each performed 8-9 rowing tests comprising: 1) five progressive incremental tests (3, 4, 5, 7 or 10 min steps); and 2) at least three 30-min constant-intensity maximal lactate steady state (MLSS) assessments. Power output (PO) at lactate threshold 1 (LT1) was higher in the 3- and 4-min incremental tests. No other measures were different for LT1. PO at the second lactate threshold (LT2) was different between most tests and was higher than the PO at MLSS except for the 10-min incremental test. LT2 Oxygen consumption (V̇O2) was higher in the 3-, 4- and 5-min tests but heart rate (HR) and rating of perceived exhaustion were not different between tests. Peak PO in the incremental tests was inversely related to the step durations (r(2) = 0.86, p ≤ 0.02). Peak V̇O2 was higher in the shorter (≤ 5 min) compared with the longer incremental tests (≥ 7 min), while peak HR was not different between tests. These data suggest that for the methods used in this study: 1) incremental exercise tests with step durations ≤ 7 min overestimate MLSS exercise intensity; 2) Peak physiological values are best determined using incremental tests with step durations ≤ 4 min; and 3) HR measures are not affected by step duration and therefore prescription of training HRs can be made using any of these tests.

Publisher URL: http://doi.org/10.1123/ijspp.2017-0258

DOI: 10.1123/ijspp.2017-0258

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.