Adding LIT to HIIT – Is Low-Intensity Training Vital for Endurance-Trained Athletes during a 7-day HIIT Shock Microcycle?

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Abstract
<jats:title>ABSTRACT</jats:title> <jats:sec> <jats:title>Purpose</jats:title> <jats:p>To investigate the effects of a 7-day high-intensity interval training shock microcycle (HIIT-SM) with or without additional low-intensity training (LIT) on aerobic fitness and endurance performance compared to a control group.</jats:p> </jats:sec> <jats:sec> <jats:title>Methods</jats:title> <jats:p>Thirty-three endurance-trained athletes (7 women, 26 men, mean ± SD: age, 30.2 ± 6.9 yr; maximal oxygen uptake (V̇O<jats:sub>2max</jats:sub>), 59.8 ± 4.9 mL·min<jats:sup>−1</jats:sup>·kg<jats:sup>−1</jats:sup>) performed exercise testing at T1 and were randomly assigned to one of three groups: i) HSM: 10 running-based HIIT sessions (5 x 4 min at 90-95% maximal heart rate) over 7 days ii) HSM + LIT: equal to HSM with additional 30-min of LIT after each HIIT iii) CG: regular training. Exercise testing was repeated 3 days (T2), 7 days (T3), and 14 days (T4) after the intervention. A 5-km time trial (TT<jats:sub>5km</jats:sub>) was performed 3-4 days before T1 and 10-11 days after the intervention. Data was analyzed by two-way repeated-measures ANOVA.</jats:p> </jats:sec> <jats:sec> <jats:title>Results</jats:title> <jats:p>No interaction effect was found for V̇O<jats:sub>2max</jats:sub> (P = 0.170, <jats:sub>p</jats:sub>η<jats:sup>2</jats:sup> = 0.09), peak power output (P = 0.734, <jats:sub>p</jats:sub>η<jats:sup>2</jats:sup> = 0.04), and work economy (P = 0.804, <jats:sub>p</jats:sub>η<jats:sup>2</jats:sup> = 0.03). There was an interaction for velocity at lactate threshold (P = 0.006, <jats:sub>p</jats:sub>η<jats:sup>2</jats:sup> = 0.18) with increased velocity in HSM at T2 (3.2%, P = 0.030), T3 (4%, P = 0.006), T4 (4%, P = 0.003), as well as in HSM + LIT for T2 (3.2%, P = 0.011), while CG showed no change. There was an interaction for TT<jats:sub>5km</jats:sub> (P = 0.044, <jats:sub>p</jats:sub>η<jats:sup>2</jats:sup> = 0.19) with HSM improving 2.7% (P = 0.003), HSM + LIT 2.3% (P = 0.010), while CG was on average – 0.3% (P = 0.821) slower.</jats:p> </jats:sec> <jats:sec> <jats:title>Conclusions</jats:title> <jats:p>HIIT-SM with or without additional LIT has negligible effects on V̇O<jats:sub>2max</jats:sub> but improves other key endurance variables in endurance-trained athletes. No superiority of either intervention group was demonstrated. Therefore, additional LIT during HIIT-SM is not beneficial.</jats:p> </jats:sec>
Autoren
  • Tilmann Strepp
  • Julia C Blumkaitis
  • Nils Haller
  • Thomas Leonhard Stöggl
DOI
10.1249/mss.0000000000003435
eISSN
1530-0315
ISSN
0195-9131
Zeitschrift
Medicine &amp; Science in Sports &amp; Exercise
Sprache
en
Online publication date
2024
Status
Published online
Herausgeber
Ovid Technologies (Wolters Kluwer Health)
Herausgeber URL
http://dx.doi.org/10.1249/mss.0000000000003435
Datum der Datenerfassung
2024
Titel
Adding LIT to HIIT – Is Low-Intensity Training Vital for Endurance-Trained Athletes during a 7-day HIIT Shock Microcycle?

Datenquelle: Crossref

Andere Metadatenquellen:
Abstract
<h4>Purpose</h4>To investigate the effects of a 7-day high-intensity interval training shock microcycle (HIIT-SM) with or without additional low-intensity training (LIT) on aerobic fitness and endurance performance compared to a control group.<h4>Methods</h4>Thirty-three endurance-trained athletes (7 women, 26 men, mean ± SD: age, 30.2 ± 6.9 yr; maximal oxygen uptake (V̇O 2max ), 59.8 ± 4.9 mL·min -1 ·kg -1 ) performed exercise testing at T1 and were randomly assigned to one of three groups: i) HSM: 10 running-based HIIT sessions (5 x 4 min at 90-95% maximal heart rate) over 7 days ii) HSM + LIT: equal to HSM with additional 30-min of LIT after each HIIT iii) CG: regular training. Exercise testing was repeated 3 days (T2), 7 days (T3), and 14 days (T4) after the intervention. A 5-km time trial (TT 5km ) was performed 3-4 days before T1 and 10-11 days after the intervention. Data was analyzed by two-way repeated-measures ANOVA.<h4>Results</h4>No interaction effect was found for V̇O 2max (P = 0.170, p η 2 = 0.09), peak power output (P = 0.734, p η 2 = 0.04), and work economy (P = 0.804, p η 2 = 0.03). There was an interaction for velocity at lactate threshold (P = 0.006, p η 2 = 0.18) with increased velocity in HSM at T2 (3.2%, P = 0.030), T3 (4%, P = 0.006), T4 (4%, P = 0.003), as well as in HSM + LIT for T2 (3.2%, P = 0.011), while CG showed no change. There was an interaction for TT 5km (P = 0.044, p η 2 = 0.19) with HSM improving 2.7% (P = 0.003), HSM + LIT 2.3% (P = 0.010), while CG was on average - 0.3% (P = 0.821) slower.<h4>Conclusions</h4>HIIT-SM with or without additional LIT has negligible effects on V̇O 2max but improves other key endurance variables in endurance-trained athletes. No superiority of either intervention group was demonstrated. Therefore, additional LIT during HIIT-SM is not beneficial.
Addresses
  • Department of Sport and Exercise Science, University of Salzburg, AUSTRIA.
Autoren
  • Tilmann Strepp
  • Julia C Blumkaitis
  • Nils Haller
  • Thomas Leonhard Stöggl
DOI
10.1249/mss.0000000000003435
eISSN
1530-0315
Externe Identifier
  • PubMed Identifier: 38587921
Open access
false
ISSN
0195-9131
Zeitschrift
Medicine and science in sports and exercise
Sprache
eng
Medium
Print-Electronic
Online publication date
2024
Datum der Veröffentlichung
2024
Status
Published
Datum der Datenerfassung
2024
Titel
Adding LIT to HIIT - Is Low-Intensity Training Vital for Endurance-Trained Athletes during a 7-day HIIT Shock Microcycle?
Sub types
  • Journal Article

Datenquelle: Europe PubMed Central

Abstract
PURPOSE: To investigate the effects of a 7-day high-intensity interval training shock microcycle (HIIT-SM) with or without additional low-intensity training (LIT) on aerobic fitness and endurance performance compared to a control group. METHODS: Thirty-three endurance-trained athletes (7 women, 26 men, mean ± SD: age, 30.2 ± 6.9 yr; maximal oxygen uptake (V̇O 2max ), 59.8 ± 4.9 mL·min -1 ·kg -1 ) performed exercise testing at T1 and were randomly assigned to one of three groups: i) HSM: 10 running-based HIIT sessions (5 x 4 min at 90-95% maximal heart rate) over 7 days ii) HSM + LIT: equal to HSM with additional 30-min of LIT after each HIIT iii) CG: regular training. Exercise testing was repeated 3 days (T2), 7 days (T3), and 14 days (T4) after the intervention. A 5-km time trial (TT 5km ) was performed 3-4 days before T1 and 10-11 days after the intervention. Data was analyzed by two-way repeated-measures ANOVA. RESULTS: No interaction effect was found for V̇O 2max (P = 0.170, p η 2 = 0.09), peak power output (P = 0.734, p η 2 = 0.04), and work economy (P = 0.804, p η 2 = 0.03). There was an interaction for velocity at lactate threshold (P = 0.006, p η 2 = 0.18) with increased velocity in HSM at T2 (3.2%, P = 0.030), T3 (4%, P = 0.006), T4 (4%, P = 0.003), as well as in HSM + LIT for T2 (3.2%, P = 0.011), while CG showed no change. There was an interaction for TT 5km (P = 0.044, p η 2 = 0.19) with HSM improving 2.7% (P = 0.003), HSM + LIT 2.3% (P = 0.010), while CG was on average - 0.3% (P = 0.821) slower. CONCLUSIONS: HIIT-SM with or without additional LIT has negligible effects on V̇O 2max but improves other key endurance variables in endurance-trained athletes. No superiority of either intervention group was demonstrated. Therefore, additional LIT during HIIT-SM is not beneficial.
Autoren
  • Tilmann Strepp
  • Julia C Blumkaitis
  • Nils Haller
  • Thomas Leonhard Stöggl
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/38587921
DOI
10.1249/MSS.0000000000003435
eISSN
1530-0315
Zeitschrift
Med Sci Sports Exerc
Sprache
eng
Country
United States
PII
00005768-990000000-00498
Datum der Veröffentlichung
2024
Status
Published online
Titel
Adding LIT to HIIT - Is Low-Intensity Training Vital for Endurance-Trained Athletes during a 7-day HIIT Shock Microcycle?
Sub types
  • Journal Article

Datenquelle: PubMed

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