Study note • PMID 35526065
The Salzburg 10/7 HIIT shock cycle study: the effects of a 7-day high-intensity interval training shock microcycle with or without additional low-intensity training on endurance performance, well-being, stress and recovery in endurance trained athletes-study protocol of a randomized controlled trial.
Low risk + high feasibility for most athletes.
ELI5
In plain language
BACKGROUND: Performing multiple high-intensity interval training (HIIT) sessions in a compressed period of time (approximately 7-14 days) is called a HIIT shock microcycle (SM) and promises a rapid increase… (randomized trial; n=36 trained runners).
The abstract suggests a positive effect on VO₂max, Lactate threshold under the tested conditions. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: BACKGROUND: Performing multiple high-intensity interval training (HIIT) sessions in a compressed period of time (approximately 7-14 days) is called a HIIT shock microcycle (SM) and promises a rapid increase…
- • The abstract suggests a positive effect on VO₂max, Lactate threshold under the tested conditions.
- • Population: n=36 trained runners.
- • Protocol cues (full paper): 9 days • 7 days • 14 days • 3 days • 00 min • 30 min.
Protocol
Protocol (as reported)
- • Intervention/exposure: aerobic, endurance (vs control group).
- • Dose/time/duration cues found in the full paper: 9 days • 7 days • 14 days • 3 days • 00 min • 30 min • 4 min • 1 min.
- • Outcomes: VO₂max, Lactate threshold.
- • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.
Fit
Who it helps, and who should skip it
Who it helps
- • Athletes similar to the study population (n=36 trained runners) working on endurance.
- • Athletes who can measure VO₂max, Lactate threshold with a repeatable workout or time-trial effort.
Who should skip
- • If you have symptoms or conditions that make the intervention risky, get professional guidance.
- • If you’re near race day and can’t safely test, defer the experiment.
Methods
What the study actually did
- • Design: randomized trial.
- • Population: n=36 trained runners.
- • Comparator: control group.
- • Outcomes measured: VO₂max, Lactate threshold.
- • Protocol cues mentioned: 14 days • 9 days • 7 days • 30 days • 30 min • 4 min • 2.5 min • 5 km.
- • Source: PubMed PMID 35526065 (2022) — BMC sports science, medicine & rehabilitation.
Full paper
What the full paper adds
- • Participants (paper): n=36 trained runners.
- • More protocol detail (paper): 9 days • 7 days • 14 days • 3 days • 00 min • 30 min • 4 min • 1 min.
Results excerpt
What the abstract reports
“The feasibility study indicates good adherence and performance improvement of the pilot participant.”
Note: excerpts are short; for full context, read the paper.
Limits
Limitations & bias
- • Abstract-only summaries can miss critical details (population, protocol, adherence, and context).
- • Single studies often don’t generalize to your event, history, and training load; treat results as a starting point.
- • If your context differs (elite vs recreational; cycling vs running), adjust expectations and be conservative.
- • This is performance information, not medical advice.
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Threshold is 'how fast you can go for a long time' — where most endurance races are decided.
Sources
- The Salzburg 10/7 HIIT shock cycle study: the effects of a 7-day high-intensity interval training shock microcycle with or without additional low-intensity training on endurance performance, well-being, stress and recovery in endurance trained athletes-study protocol of a randomized controlled trial.
- DOI: 10.1186/s13102-022-00456-8
- Full text (PMC)