The Claim
In previously untrained to moderately trained adults, endurance training (ET), high-intensity interval training (HIT), and sprint interval training (SIT) are associated with similar percentage increases in skeletal muscle mitochondrial content, averaging 23–27%, after adjusting for training frequency, duration, and initial fitness level, with no significant differences between the training modalities, indicating that all three forms of exercise effectively stimulate mitochondrial biogenesis.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
For people who aren't super fit to start with, different types of workouts—like steady cardio, intense interval training, and short sprints—boost the energy powerhouses in their muscles by about the same amount, around 23–27%.
See the scientific wording
In previously untrained to moderately trained adults, endurance training (ET), high-intensity interval training (HIT), and sprint interval training (SIT) are associated with similar percentage increases in skeletal muscle mitochondrial content, averaging 23–27% after adjusting for training frequency, duration, and initial fitness level, with no significant differences between training modalities, indicating that all three forms of exercise effectively stimulate mitochondrial biogenesis.
What the research says
1 studyThe study found that different types of exercise—like steady jogging, intense intervals, and all-out sprints—boost muscle energy factories (mitochondria) by about the same amount when done regularly, which supports the claim.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.