Key result
Reducing training duration to 13 minutes/day maintained VO2 max and cardiac size, but significantly decreased long-term endurance by 10% compared to a 26-minute/day regimen.
Why the study?
Does reducing training duration to 13 or 26 minutes/day maintain VO2 max, endurance, and cardiac growth in previously trained subjects?
Population
13 subjects
Comparison
Reduced training duration of 13 min/day, 6… vs Reduced training duration of 26 min/day, 6…
Design
Cohort
Follow-up
25 weeks
Authors
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May support ≥26 min/day to preserve endurance in trained athletes; leaves open minimal-dose effects in prospective trials.
Does reducing training duration to 13 or 26 minutes/day maintain VO2 max, endurance, and cardiac growth in previously trained subjects?
A two-thirds reduction in training duration maintains VO2 max, short-term endurance, and cardiac hypertrophy, but at least a 50% reduction (26 min/day) is required to maintain long-term endurance.
Hickson et al. (1982) studied this question. Reduced training duration (13 min/day) vs. Reduced training duration (26 min/day) was evaluated on Maximum oxygen uptake (VO2 max), endurance, and cardiac size. Reducing training duration to 13 minutes/day maintained VO2 max and cardiac size, but significantly decreased long-term endurance by 10% compared to a 26-minute/day regimen.
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