Study note • PMID 33307555
High-intensity Interval Training Shock Microcycle Improves Running Performance but not Economy in Female Soccer Players.
How to use this page
This note summarizes one study record. Check the participants, methods, results, and limitations before applying it to training.
- • Design signal: randomized trial.
- • Population relevance: mixed/unclear athlete specificity.
- • Consistency: single-study evidence.
- • Practical recommendation depends on tolerance, context, and whether it protects training consistency.
ELI5
In plain language
This study aimed to evaluate the effect of high-intensity interval training shock microcycles (HIIT(SM)) on endurance, running economy and change of direction economy in female soccer players. (randomized trial; elite participants).
The abstract doesn’t indicate a clear change in 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: This study aimed to evaluate the effect of high-intensity interval training shock microcycles (HIIT(SM)) on endurance, running economy and change of direction economy in female soccer players.
- • The abstract doesn’t indicate a clear change in Lactate threshold under the tested conditions.
- • Population: elite participants.
- • Protocol cues (title/abstract): 13 days • 20m • 10m.
Protocol
Protocol (as reported)
- • Intervention/exposure: endurance, interval (vs comparison group).
- • Dose/time/duration cues in abstract/title: 13 days • 20m • 10m.
- • Outcomes: VO₂max, Lactate threshold.
- • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.
Fit
Who it may help, and who should be cautious
Who it helps
- • Athletes similar to the study population (elite participants) working on endurance.
- • Athletes who can measure VO₂max, Lactate threshold with a repeatable workout or time-trial effort.
Who should be cautious
- • 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: elite participants.
- • Comparator: comparison group.
- • Outcomes measured: VO₂max, Lactate threshold.
- • Protocol cues mentioned: 13 days • 20m • 10m.
- • Source: PubMed PMID 33307555 (2021) — International journal of sports medicine.
Results excerpt
What the abstract reports
“There was no significant interaction (groupxtime) for running economy and change of direction economy.”
Note: excerpts are short; for full context, read the paper.
Limits
Limitations and 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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