PMID- 34855913
OWN - NLM
STAT- MEDLINE
DCOM- 20211213
LR  - 20211214
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 16
IP  - 12
DP  - 2021
TI  - Three weeks of a home-based "sleep low-train low" intervention improves 
      functional threshold power in trained cyclists: A feasibility study.
PG  - e0260959
LID - 10.1371/journal.pone.0260959 [doi]
LID - e0260959
AB  - BACKGROUND: "Sleep Low-Train Low" is a training-nutrition strategy intended to 
      purposefully reduce muscle glycogen availability around specific exercise 
      sessions, potentially amplifying the training stimulus via augmented cell 
      signalling. The aim of this study was to assess the feasibility of a 3-week 
      home-based "sleep low-train low" programme and its effects on cycling performance 
      in trained athletes. METHODS: Fifty-five trained athletes (Functional Threshold 
      Power [FTP]: 258 +/- 52W) completed a home-based cycling training program 
      consisting of evening high-intensity training (6 x 5 min at 105% FTP), followed 
      by low-intensity training (1 hr at 75% FTP) the next morning, three times weekly 
      for three consecutive weeks. Participant's daily carbohydrate (CHO) intake (6 
      g.kg-1.d-1) was matched but timed differently to manipulate CHO availability 
      around exercise: no CHO consumption post- HIT until post-LIT sessions [Sleep Low 
      (SL), n = 28] or CHO consumption evenly distributed throughout the day [Control 
      (CON), n = 27]. Sessions were monitored remotely via power data uploaded to an 
      online training platform, with performance tests conducted pre-, 
      post-intervention. RESULTS: LIT exercise intensity reduced by 3% across week 1, 3 
      and 2% in week 2 (P < 0.01) with elevated RPE in SL vs. CON (P < 0.01). SL 
      enhanced FTP by +5.5% vs. +1.2% in CON (P < 0.01). Comparable increases in 5-min 
      peak power output (PPO) were observed between groups (P < 0.01) with +2.3% and 
      +2.7% in SL and CON, respectively (P = 0.77). SL 1-min PPO was unchanged (+0.8%) 
      whilst CON improved by +3.9% (P = 0.0144). CONCLUSION: Despite reduced relative 
      training intensity, our data demonstrate short-term "sleep low-train low" 
      intervention improves FTP compared with typically "normal" CHO availability 
      during exercise. Importantly, training was completed unsupervised at home (during 
      the COVID-19 pandemic), thus demonstrating the feasibility of completing a "sleep 
      low-train low" protocol under non-laboratory conditions.
FAU - Bennett, Samuel
AU  - Bennett S
AD  - Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores 
      University, Liverpool, United Kingdom.
AD  - Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport, 
      Paris, France.
FAU - Tiollier, Eve
AU  - Tiollier E
AD  - Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport, 
      Paris, France.
FAU - Brocherie, Franck
AU  - Brocherie F
AUID- ORCID: 0000-0002-0808-7986
AD  - Laboratory Sport, Expertise and Performance (EA 7370), French Institute of Sport, 
      Paris, France.
FAU - Owens, Daniel J
AU  - Owens DJ
AUID- ORCID: 0000-0002-1908-8677
AD  - Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores 
      University, Liverpool, United Kingdom.
FAU - Morton, James P
AU  - Morton JP
AD  - Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores 
      University, Liverpool, United Kingdom.
FAU - Louis, Julien
AU  - Louis J
AUID- ORCID: 0000-0002-9109-0958
AD  - Research Institute for Sport and Exercise Science (RISES), Liverpool John Moores 
      University, Liverpool, United Kingdom.
LA  - eng
PT  - Journal Article
DEP - 20211202
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
SB  - IM
MH  - Adult
MH  - Athletes
MH  - Bicycling/*physiology
MH  - COVID-19
MH  - Endurance Training/*methods
MH  - Feasibility Studies
MH  - Female
MH  - High-Intensity Interval Training/methods
MH  - Humans
MH  - Male
MH  - Nutritional Physiological Phenomena
MH  - Physical Endurance
MH  - Self Care/methods
MH  - Sleep/physiology
PMC - PMC8639084
COIS- The authors have declared that no competing interests exist.
EDAT- 2021/12/03 06:00
MHDA- 2021/12/15 06:00
PMCR- 2021/12/02
CRDT- 2021/12/02 17:34
PHST- 2021/06/21 00:00 [received]
PHST- 2021/11/21 00:00 [accepted]
PHST- 2021/12/02 17:34 [entrez]
PHST- 2021/12/03 06:00 [pubmed]
PHST- 2021/12/15 06:00 [medline]
PHST- 2021/12/02 00:00 [pmc-release]
AID - PONE-D-21-20297 [pii]
AID - 10.1371/journal.pone.0260959 [doi]
PST - epublish
SO  - PLoS One. 2021 Dec 2;16(12):e0260959. doi: 10.1371/journal.pone.0260959. 
      eCollection 2021.