| Title |
Live high–train low guided by daily heart rate variability in elite Nordic-skiers
|
|---|---|
| Published in |
European Journal of Applied Physiology, December 2017
|
| DOI | 10.1007/s00421-017-3784-9 |
| Pubmed ID | |
| Authors |
Laurent Schmitt, Sarah J. Willis, Anthony Fardel, Nicolas Coulmy, Gregoire P. Millet |
| Abstract |
To analyze if live high-train low (LHTL) effectiveness is improved when daily training is guided by heart rate variability (HRV). Twenty-four elite Nordic skiers took part in a 15-day LHTL study and were randomized into a HRV-guided training hypoxic group (H-HRV, n = 9, sleeping in normobaric hypoxia, FiO2 = 15.0%) and two predefined training groups sleeping either in hypoxia (H, n = 9, FiO2 = 15.0%) or normoxia (N, n = 6). HRV and training loads (TL) were recorded daily. Prior (Pre), one (Post-1), and 21 days (Post-21) following LHTL, athletes performed a 10-km roller-ski test, and a treadmill test for determination of [Formula: see text] was performed at Pre and Post-1. Some HRV parameters measured in supine position were different between H-HRV and H: low and high (HF) frequency power in absolute (ms2) (16.0 ± 35.1 vs. 137.0 ± 54.9%, p = 0.05) and normalized units (- 3.8 ± 10.1 vs. 53.0 ± 19.5%, p = 0.02), HF(nu) (6.3 ± 6.8 vs. - 13.7 ± 8.0%, p = 0.03) as well as heart rate (3.7 ± 6.3 vs. 12.3 ± 4.1%, p = 0.008). At Post-1, [Formula: see text] was improved in H-HRV and H (3.8 ± 3.1%; p = 0.02 vs. 3.0 ± 4.4%; p = 0.08) but not in N (0.9 ± 5.1%; p = 0.7). Only H-HRV improved the roller-ski performance at Post-21 (- 2.7 ± 3.6%, p = 0.05). The daily individualization of TL reduced the decrease in autonomic nervous system parasympathetic activity commonly associated with LHTL. The improved performance and oxygen consumption in the two LHTL groups confirm the effectiveness of LHTL even in elite endurance athletes. |
X Demographics
The data shown below were collected from the profiles of 36 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 7 | 19% |
| United Kingdom | 4 | 11% |
| Switzerland | 4 | 11% |
| France | 3 | 8% |
| Canada | 1 | 3% |
| Brazil | 1 | 3% |
| Ireland | 1 | 3% |
| Mexico | 1 | 3% |
| Finland | 1 | 3% |
| Other | 1 | 3% |
| Unknown | 12 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 20 | 56% |
| Scientists | 10 | 28% |
| Practitioners (doctors, other healthcare professionals) | 5 | 14% |
| Science communicators (journalists, bloggers, editors) | 1 | 3% |
Mendeley readers
The data shown below were compiled from readership statistics for 152 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 152 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 28 | 18% |
| Student > Bachelor | 17 | 11% |
| Researcher | 16 | 11% |
| Student > Ph. D. Student | 13 | 9% |
| Student > Doctoral Student | 9 | 6% |
| Other | 24 | 16% |
| Unknown | 45 | 30% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 63 | 41% |
| Medicine and Dentistry | 9 | 6% |
| Nursing and Health Professions | 7 | 5% |
| Agricultural and Biological Sciences | 5 | 3% |
| Neuroscience | 3 | 2% |
| Other | 7 | 5% |
| Unknown | 58 | 38% |
Attention Score in Context
This research output has an Altmetric Attention Score of 71. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 07 July 2022.
All research outputs
#614,726
of 25,732,188 outputs
Outputs from European Journal of Applied Physiology
#169
of 4,385 outputs
Outputs of similar age
#13,700
of 446,550 outputs
Outputs of similar age from European Journal of Applied Physiology
#7
of 59 outputs
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So far Altmetric has tracked 4,385 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 14.7. This one has done particularly well, scoring higher than 96% of its peers.
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